28 February 2016, Volume 47 Issue 2

    

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Focuses & Concerns
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  Impact of rare-earth Er³⁺/Yb³⁺ on structure and photoluminescence property of porous silicon

  ZHANG Chunling, TANG Lei, ZHANG Huiping, YAO Jianghong

  功能材料. 2016, 47(2): 2001-2005. https://doi.org/10.3969/j.issn.1001-9731.2016.02.001

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  Porous silicon layers are prepared by electrochemical etching in double cell, and then doped with rare earth elements Er³⁺/Yb³⁺ with electrochemical method. The structure and composition of the samples were analyzed by scanning electron microscope and X-ray diffraction spectroscopy, and the changes in the energy level and the transfer process of energy were analyzed by comparing the fluorescence spectra of the samples rare earth elements doping. The results show that the green emission to the O—Si bonds present in the oxidized layer of as-prepared, but the red PL of the visible region and the PL bands in the near-infrared region is come from the selective transitions or cross-relaxation between Er³⁺ and Yb³⁺ ions.
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  Study of cystine sodium immobilization and anti-platelet activation on TiO₂ film

  WANG Hong, FAN Yonghong, HAN Honghong, PAN Xiaxin, WENG Yajun, HUANG Nan

  功能材料. 2016, 47(2): 2006-2009. https://doi.org/10.3969/j.issn.1001-9731.2016.02.002

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  It is acknowledged that NO releasing by degradation of endogenous NO donor catalyzed by biomaterials can significantly improve blood compatibility of the surfaces. And D-cystinesodium, a poly-dopamine coating was used to as a linker to immobilize cystine sodium with different chirality such as L-cystinesodium on TiO₂ films to construct catalytic activity.The effect of immobilizing cystine sodium with different chirality on anti-platelet activation was analyzed.The X-ray photoelectron spectroscopy (XPS) and the water contact angle test results showed that, in the same preparation process, the surfaces with either L-cystinesodium or D-cystinesodium immobilization have similar physical and chemical properties, while there are different biological properties of the two kinds of thesurfaces.Surfaces with D-cysteine sodium immobilization show higher hydrophilicproperties with higher standard error after pre-adsorption of BSA, while surfaces with L-type immobilization show higher NO release by catalyzing endogenous NO and enhancement of anti-platelet activation ability in vitro.
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  Effect of nano-SiO₂ on hydration and hardening of sulphoaluminate cement

  MA Baoguo, MEI Junpeng, LI Hainan, LIU Fengli

  功能材料. 2016, 47(2): 2010-2014. https://doi.org/10.3969/j.issn.1001-9731.2016.02.003

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  The influence of nano-SiO₂ (NS) on compressive/flexural strengths of sulphoaluminate cement (SAC) were studied. Results show that, as the content of NS increases, the compressive/flexural strengths of SAC mortars are significantly improved and especially there is still large room for the growth of later flexural strength. The flexural strength of SAC mortar with 3% NS at 2,8 h,1,3,28 and 56 d increases by 44.84%,41.80%,37.85%,37.78%,42.32% and 65.03% respectively comparing that of pure SAC. Also, the developing mechanism of strength is discovered by X-ray diffraction (XRD), scanning electron microscopy energy dispersive analysis (SEM-EDS) and hydration heat. The micro-aggregate filling effect and nucleation effect of NS at early age lead to the structure more uniform and compact and accelerate the hydration of SAC before 8 h. Moreover, the hydration degree of SAC was further improved due to the pozzolanic effect of NS at later age.
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  First-principles calculation on rare earth luminescent material

  JING Xiaolong, DENG Ying, CHEN Hui, PU Yong, PENG Lingling

  功能材料. 2016, 47(2): 2015-2019. https://doi.org/10.3969/j.issn.1001-9731.2016.02.004

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  The first-principles calculation were important tools to investigate the properties of materials. Rare earth luminescent materials were widely used in daily life, and the demands for original innovation were higher and higher. In this paper, we review the research results of the first-principles calculation in rare earth luminescent material, and foresaw the future.
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  Fabrication and biological evaluation of the new titanium matrix composites

  FAN Xingping, WANG Benju, REN Xiaoqing

  功能材料. 2016, 47(2): 2020-2023. https://doi.org/10.3969/j.issn.1001-9731.2016.02.005

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  The reactants of hydroxyapatite and titanium powder were sintered at 1200 ℃ for 3 h. When hydroxyapatite ratios were 40%, 15% and 5%. The compression strength of the sinters were 15.50,57.63 and 188.82 MPa, respectively. XRD results indicated that the sinter could be a new composite with phases contained not only titanium, but also Ti₃O、Ti₃P and CaO. When the HA addition was 5%, the surface of the sintered composite was covered by spherical HA after immersing in SBF solution for 7 days. The results showed that the material has excellent mechanical properties and biological activity.
Revies & Advance
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  Research progress on the interface structure, exchange coupling and magnetization reversal in nanocomposite magnets

  LI Zhubai, ZHANG Xuefeng, LI Yongfeng, LIU Yanli, ZHAO Qian

  功能材料. 2016, 47(2): 2024-2030. https://doi.org/10.3969/j.issn.1001-9731.2016.02.006

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  The energy product could be improved largely in nanostructure magnets owing to the interfacial exchange coupling that is strongly dependent on the interface structure between soft and hard magnetic phases. In this paper, the interface structure, interfacial exchange coupling and magnetization reversal are reviewed in Nd₂Fe₁₄B, Sm-Co and FePt based nanocomposite magnets. The atomically coherence, atomic interdiffusion, amorphous phase, nonmagnetic layer and lattice relaxation at the interface are possibly beneficial to modify the interface structure, improve the exchange coupling in different conditions and further affect the magnetization reversal process. The irreversible magnetization reversal, strongly depending on the nature of interface between hard/soft phases, occurs mainly in hard phases and determines the coercivity, which could be manipulated by modifying the interface structure. It is expected that this review is helpful for understanding fully the effect of interface and for improving the magnetic properties in nanocomposite magnets.
Research & Development
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  Preparation and absorption capability study of strontium substituted nano-hydroxyapatite for methotreaxate

  XIE Yuanfei, JI Jingou, XIANG Cuncheng, XU Yi

  功能材料. 2016, 47(2): 2031-2035. https://doi.org/10.3969/j.issn.1001-9731.2016.02.007

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  Strontium substituted nano-hydroxyapatite (nano-SrHA) was synthesized by co-precipitation method and applied to treat bone tumors.. The morphology of nano-SrHA was determined by transmission electron microscope (TEM) while its phase composition was characterized with X-ray diffraction (XRD). The absorption capability of nano-SrHA effected by coprecipitation time, feeding ratios of Sr, methotreaxate (MTX) concentrations and pH were also investigated. The results showed that the diffraction angles of nano-SrHA shifted to small value with the increase of feeding ratios of Sr, crystal forms and absorption capability increased with the coprecipitation time, and the nano-Sr_0.3HA with the acicular structure had the best absorption capability of 43.09 mg/g when the pH was about 7.8. It indicated that nano-Sr_0.3HA might be a potential candidate as MTX-delivery carrier.
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  First-principles study of electronic and magnetic properties of Fe doping in CdTe crystal

  LI Zhaoning, ZHAO Xincai, WANG Weiping

  功能材料. 2016, 47(2): 2036-2040. https://doi.org/10.3969/j.issn.1001-9731.2016.02.008

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  The structural, electronic and magnetic properties of Fe impurity doping in CdTe are studied using first principles based on the density functional theory (DFT) in a supercell approach. In order to make an accurate description of transition atom Fe, a generalized gradient approximation (GGA)+U method is used. The results show that there are significant changes in the bond lengths, magnetization and electronic properties. Based on electronic band structure and electron density of states, varies in electronic structures induced by orbital hybridization with respect to different doping site types (substitutional or interstitial) are analysed. It is found that the local magnetic moments of substitutional and interstitial Fe impurities are 3.76 and 3.14 Bohr magnetons, respectively. These conclusions provide some useful reference to understand the physical mechanism of CdTe based diluted magnetic semiconductors.
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  Study on the effects of calcination process on the morphology and property of α-Fe₂O₃ magnetic nanofibers

  WANG Xinyue, GAO Qiang, GE Mingqiao

  功能材料. 2016, 47(2): 2041-2045. https://doi.org/10.3969/j.issn.1001-9731.2016.02.009

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  PVA/Fe₃O₄ magnetic nanofiber was successfully prepared via electrospinning and hydrothermal synthesis. The as-prepared PVA/Fe₃O₄ magnetic nanofiber was calcined in a tube furnace under air atmosphere to achieve a series of α-Fe₂O₃ magnetic nanofibers. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and superconducting quantum interference device (SQUID) were employed to characterize α-Fe₂O₃ magnetic nanofibers. The results indicated that α-Fe₂O₃ magnetic nanofiber can be obtained via calcinations of PVA/Fe₃O₄ magnetic nanofibers from 600-800 ℃. The hollow tubular structureturned gradually into groove-like structure as the calcinations temperature increased. α-Fe₂O₃ nanoparticles in the nanofiber had different grain size as well as magnetic property, and its crystallization got better with the increase of temperature. The resultant α-Fe₂O₃ magnetic nanofibers possess potential application in water treatment.
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  Research on the effect of m(M)/m(P) ratio for the autogenous shrinkage and mechanism of magnesium phosphate cement

  QI Zhaoqing, WANG Hongtao, XUE Ming

  功能材料. 2016, 47(2): 2046-2050. https://doi.org/10.3969/j.issn.1001-9731.2016.02.010

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  By improving non-contact shrinkage deformation of concrete tester and target.The effect of m(M)/m(P) ratio on autogenous shrinkage behavior of magnesium phosphate cement stone were studied. The eight channel trace amount of heat meter, mercury injection apparatus, X-ray diffractometer and scanning electron microscope with energy spectrometer were applied to characterize its mechanism of autogenous shrinkage. The results show that the autogenous shrinkage of magnesium phosphate cement shows the characteristics of three phase, namely the rapid shrinkage of early stage, micro-expansion stage, the slow development shrinkage stage. With the increase of m(M)/m(P) ratio, the hydration heat quantity of magnesium phosphate cement reduce, the internal porosity increases, the crystallinity of hydration products reduced, structure is loose, so the shrinkage rate decreased.
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  Optimization of non-water based slurry in fixed abrasive polishing of LBO crystal

  SONG Longlong, LI Jun, WANG Wenze, HU Zhanggui, ZHU Yongwei, ZUO Dunwen

  功能材料. 2016, 47(2): 2051-2054. https://doi.org/10.3969/j.issn.1001-9731.2016.02.011

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  Lithium triborate (LBO) crystal was an excellent nonlinear optical crystal material. The residual water on crystal surface results in crystal deliquescence after polishing, which affects the use of the device. In this article, fixed abrasive polishing of LBO crystal using non-water based slurry was used, which reduced the water content. The influence of the concentration of deionized water, lactic acid, hydrogen peroxide on material removal rate and surface roughness were investigated. And the slurry components was optimized to achieve high material removal rate and good surface finish. The results show that deionized water 16%, lactic acid 22%, hydrogen peroxide 5% in non-water based slurry are the optimal combination. In this case, material removal rate achieves 392 nm/min and surface roughness is 0.62 nm in fixed abrasive polishing of LBO crystal. The high efficiency and high quality polishing method for LBO crystal comes true, which avoids to use a lot of water at the same time.
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  Influence of C₁₆H₁₀ doping on superconducting properties of MgB₂ thin films

  ZHANG Song, MA Junli, FU Yao, WANG Xu, LUO Zijiang, DENG Chaoyong

  功能材料. 2016, 47(2): 2055-2059. https://doi.org/10.3969/j.issn.1001-9731.2016.02.012

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  In this work, pyrene (C₁₆H₁₀) was doped into MgB₂ thin films by chemical vapor deposition method. The crystal structure, surface morphology and superconductivity of MgB₂ thin films were characterized by X-ray diffraction, scanning electron microscopy and physical property measurement system. The results indicated that a-axis lattice parameter and grain size of MgB₂ decreased with an increasing weight of C₁₆H₁₀ doping. All the doped samples exhibit higher superconducting performance than un-doped sample. The highest critical current density (J_c) and irreversibility field was obtained when MgB₂ thin films doped with 0.2 g C₁₆H₁₀. The J_c of the 0.2 g C₁₆H₁₀ doped sample reaches 1.12×10⁴ A/cm² at 5 K and 3 T, which was an order of magnitude higher than un-doped sample. These results suggest that magnetic flux pinning of the MgB₂ thin films was significantly improved by C₁₆H₁₀ doping.
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  Chloride diffusion in concrete in a west chlorine saline soil medium

  YAN Changwang, LI Jie, ZHANG Ju, LIU Shuguang

  功能材料. 2016, 47(2): 2060-2066. https://doi.org/10.3969/j.issn.1001-9731.2016.02.013

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  In order to study chloride diffusion in concrete in a west chlorine saline soil medium, experimental analysis, micro scanning and theoretic prediction were applied. The main contents included chloride content and distribution, maximum content and convection zone depth, time dependence of free chloride content and micro morphology in the surface concrete, and prediction of experienced time to get critical chloride concentration for steel corrosion at the given concrete cover depth. The study results shows content of free chloride and total chloride increase first and then decrease with the erosion depth, better linear relationship appears between them. Chloride peak content exists and changes slightly with the soaking period. However, convection zone depth increases, chloride content in the surface concrete grows, Friedel’s salt and chloride element in the surface concrete gets more with the increase of soaking time. Theoretic analysis results indicate diffusion coefficient increases with the increase of erosion depth and decreases with the increase of soaking period. Predicted result of service life agrees with the actual corrosion situation of concrete structures, and prediction model for service life can be used to predict and analyze service time of concrete structures in the west chlorine saline soil medium.
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  Molecular dynamics research of crack propagation along the [111] orientation in single crystal γ-TiAl

  LUO Dechun, RUI Zhiyuan, FU Rong, ZHANG Ling, YAN Changfeng, CAO Hui

  功能材料. 2016, 47(2): 2067-2071. https://doi.org/10.3969/j.issn.1001-9731.2016.02.014

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  In order to explore the mechanism of crack propagation in γ-TiAl alloy with specific crystal orientation from the micro perspective, the extension process of micro crack and fracture mechanism of γ-TiAl alloy with [111] orientation are studied in this paper. First,the [111] orientation’s micro crack was preseted in single crystal γ-TiAl, second, propagation process of this crack was simulated by the molecular dynamics,finally,the changes of crack tip atomic configuration, the propagation path of micro crack and the condition of stress and strain were studied. Studies have shown that micro crack propagation process is not along a straight line extension, but show the obvious effect of orientation. When just began to crack, the deflection of crack tip was happened along the main crack. Micro cracks extend by the way of crack tip slip dislocation and twin slip was formed on the crack tip. Under the influence of boundary, the sub crack appeared at the accumulation point of border dislocation, and extension mechanism was similar to the main crack. Through the interaction of slip dislocation was emissioned from two micro crack tip, the sub crack initiationed again in the main crack tip front-end. Finally, the main crack and the sub crack connected, expansion to fracture. Stress distribution in the process of micro crack extension mainly focused on the crack tip and formed in the extension process of twinning plane, and along with the expansion of micro crack, crack tip stress value decreases with the increase of the time.
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  Effect of oxide scale microstructure on weathering resistance property of hot-rolled strip

  SUN Bin, HE Yongquan, LIU Zhenyu

  功能材料. 2016, 47(2): 2072-2077. https://doi.org/10.3969/j.issn.1001-9731.2016.02.015

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  The corrosion behavior of a hot-rolled steel with four types of oxide scale was investigated by the dry and wet cyclic accelerated corrosion test. The test results for 80 cycles indicated that scale comprised wustite and magnetite had the strongest corrosion-resistance. The corrosion resistance of scale comprised magnetite/iron mixture and magnetite was weakest.It has been found that the comosion products are prior to nucleate on the defects of oxide scale, and grow into outer rust layer during the early stage. As the outer rust layer growing, the volume of corrision products become bigger. The cracks would form on the defects of oxide scale and grow to the matrix, which could be the corrosion core of inner rust layer. During the late stage the inner rust formed with the outerrust layer growing, by the growth of comosion core on the faying face. At the same time, oxide scale was lost protection function.
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  Mechanical properties, morphology and DMA of flax/basalt (glass) fiber fabric hybrid composite baterials

  YANG Yuefei, ZHENG Feng, XU Jianfeng, LAI Jiajia, SONG Jianbin, YANG Wenbin

  功能材料. 2016, 47(2): 2078-2083. https://doi.org/10.3969/j.issn.1001-9731.2016.02.016

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  The composites (B1-B3 and G1-G3) were prepared by changing the weight ration between flax and basalt fibers or glass fibers (F/B and F/G), the effect of theoretical density, actual density, mechanical and DMA performance were studied as well. The results show that actual density and theoretical density values of F/G increase gradually with the increase of GF contents and actual density of F/B increase with the increase of BF contents, except theoretical values. Flexural strength, flexural modulus and impact strength of F/B and F/G that are enhanced with increasing the amount of BF and GF are 67.2% (26.3%), 67.8% (48.0%) and 39% (58.9%) higher than that of B1 (G1), respectively. It was found that specific strength and modulus of F/G and F/B was approximate, but impact strength,dynamic thermophysical properties and interfacial adhesion of F/G was obviously better than that of F/B. SEM graphs indicate a poor interfacial adhesion between flax fiber and UP matrix and superior interfacial adhesion in GF and UP matrix. So mechanical properties of F/G was better than that of F/B.
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  The structure and dyeing properties of sodium alginate/antarctic krill protein composite fibre

  YANG Lijun, GUO Jing, LIU Mengzhu, ZHANG Sen, GUAN Fucheng, MU Siyang, QI Shanwei, LI Shenglin

  功能材料. 2016, 47(2): 2084-2088. https://doi.org/10.3969/j.issn.1001-9731.2016.02.017

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  The sodium alginate/antarctic Krill protein (SA/AKP) composite fiber has been prepared successfully by wet spinning. Composite resistance swelling agent with glutar aldehyde and acid dye were applied to dye SA/AKP fiber. The relationship between dyeing performance parameters such as dyeing rate, color fastness and apparent color depth and dyeing process were discussed. Dyeing fiber mechanical properties was also studied. At the same time, their structure were researched by infrared spectra (FT-TR) and scanning electron micrograph (SEM). The study shows that the surface of composite fiber shows uniform groove microstructure and the cross section presents oval. The results indicated that acid dyes for SA/AKP fiber were suitable and dyeing rate was 95.71%. Resistance to washing fastness level above 3,K/S value increases with temperature. The trend of K/S with the change of temperature is relatively slow after 60 ℃. Dyeing fiber mechanical properties loss ratio were decreases with the temperature increasing. When the temperature reach 80 ℃ dyed fiber mechanical properties increased by 0.3% and initial modulus decreases slightly to 3.7%.
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  Study on mechanical properties and morphological structure of sPS/PBA-aPS blends

  SUN Xingxing, LIU Xijun, LOU Chunhua, YU Ye, ZHANG Xuequan

  功能材料. 2016, 47(2): 2089-2093. https://doi.org/10.3969/j.issn.1001-9731.2016.02.018

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  In this paper, syndiotactic polystyrene was toughened with the polybutyl acrylate- atactic polystyrene (PBA-aPS) core-shell latex particles. The influence of PBA-aPS’ dosage on the sPS/PBA-aPS blends and morphological structure of which was studied. It was discovered that the addition of PBA-aPS particles could improve the toughness of sPS, when PBA-aPS content is 25%, unnotched Izod impact strength is doubled to 17.8 kJ/m³, when comparing with the pure sPS. Thermal performance and morphological structure were mearured by DSC,TG,DMA and SEM. Result showed that. Thermal decomposition temperature also decreases,with the addition of PBA-aPS blends still contain two phases, and the crystallinity decreases with the increasing of PBA-aPS dosage, glass transition temperature T_g decreases gradually. With the increasing of PBA-aPS content, thermal decompostion temperatute decreaces, however the temperature of maximum thermal decomposition rate increases. PBA-aPS particles are compatioble with and uniformly dispersed in sPS matrix. We propose that the toughening mechanism is the combination of the PBA-aPS’ cavitation and sPS’ multiple crazing induced by PBA-aPS.
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  The effect of trace TiB₂ on the grain growth kinetics of Ti-6Al-4V alloy in the β phase region

  HUANG Liguo, CHEN Yuyong

  功能材料. 2016, 47(2): 2094-2099. https://doi.org/10.3969/j.issn.1001-9731.2016.02.019

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  The effect that trace TiB₂ has on the grain growth behavior of two phase titanium alloy Ti-6Al-4V was studied. Higher temperature solid solution plus water quenching was conducted above the β transformation temperature, followed by the microstructure observation to confirm the grain size of the alloy. According to the experiment, TiB₂ in titanium alloy transformed to TiB. TiB particles are mainly at the grain boundary and significantly restrain the grain growth of the alloy. Solid soluted for 120 min when it was higher than transformation temperature by 100 ℃, the grain size of Ti-6Al-4V-0.32TiB₂ alloy only grows by 79 μm. The dynamic analysis shows that the grain growth exponent of Ti-6Al-4V-0.32TiB₂ was in the range of 0.036-0.037, which was far smaller than that of Ti-6Al-4V alloy, while the activation energy of grain growth was four times Ti-6Al-4V alloy. The calculation shows that the way TiB particles distribute at the grain boundary also influences the pinning effect significantly.
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  Influence of pressure on the properties of boron doped ZnO thin films

  WANG Hemei, ZHU Hua, ZHANG Jinyan, WANG Yanxiang, YANG Zhisheng, GUO Pingchun

  功能材料. 2016, 47(2): 2100-2103. https://doi.org/10.3969/j.issn.1001-9731.2016.02.020

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  ZnO:B thin films were deposited on glass substrate by magnetron sputtering at different temperature. The properties of ZnO:B thin films of were characterizated by X-ray diffraction(XRD), ultraviolet-visible spectrophotometer, four-probe meter and roughness tester. The results showed that the average transmittance of all the thin film samples was over 91% between 420 and 900 nm. With the increase of pressure, the resistivity first decreases and then increases, however the grain size first increases and then decreases. The lowest resistivity can be achieved to 1.53 × 10^-3 Ω·cm when the pressure was 0.5 Pa. All the samples’ band gaps have blue shifts by contrast with intrinsic ZnO.
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  Effects of adding CNTs on properties of Al-Cu alloy

  LI Chunhong, LUAN Baifeng, HE Weijun, YANG Liu, QIU Risheng, WANG Ke, LI Zhiqiang, ZHANG Di, LIU Qing

  功能材料. 2016, 47(2): 2104-2107. https://doi.org/10.3969/j.issn.1001-9731.2016.02.021

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  In this paper, we added CNTs to Al-Cu alloy by flake powder metallurgy,compared the density, electrical conductivity, hardness, tensile strength and high temperature rheological behavior before and after the addition of CNTs and analyzed the causes of the changes of the properties by SEM and TEM. The results show that the addition of CNTs leads to the grain refinement, increases the hardness and the tensile strength of the alloy. The changes of the high temperature stress and strain curves of the Al-Cu alloy and CNTS/Al-Cu composite are consistent, but the flow stress of the composites are higher than that of the matrix at different deformation temperature and deformation rate due to the increase of CNTs, especially at low temperature and high deformation rate
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  Synthesis and characterization of alkanolamide-based hydroxyl-terminated polyester

  WANG Xuechuan, LI Yang, WANG Haijun

  功能材料. 2016, 47(2): 2108-2111. https://doi.org/10.3969/j.issn.1001-9731.2016.02.022

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  Hydroxyl terminated hyperbranched polyesters of generations 1-3 were synthesized by one-pot method using coconut-oil fatty acid diethanolamide (CDEA) with dimethylol propionic acid (DMPA) as monomers, p-toluenesulfonic acid (p-TSA) as catalyst. The appropriate reaction conditions were optimized by single factor experiments as follows. The reaction temperature was 160 ℃, the reaction time was 4 h and the quantity of catalyst was equal to 2% of feedstock. The molecular structures of the products were characterized by FT-IR and ¹H NMR while surface activities were measured by more than one standard. The results showed that different properties of the modified surfactants were obtained using hyperbranched structure.
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  Influence of ultrasonic assisted grinding parameters on machined surface quality of SiC_p/Al

  LIANG Guiqiang, ZHOU Xiaoqin, ZHAO Feifei

  功能材料. 2016, 47(2): 2112-2115. https://doi.org/10.3969/j.issn.1001-9731.2016.02.023

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  In order to research influence of grinding parameters on machined surface quality of SiC_p/Al compound material, SiC_p/Al workpieces were ultrasonic assisted grinded. Considering value ranges of spindle speed, feed rate and grinding depth, 16 groups experiments were designed. After ultrasonic assisted grinding SiC_p/Al, surface roughness, surface breaking rate, contour deviation and contour sharpness of the workpieces were measured. Influence of the grinding parameters on the machined surface quality parameters were analyzed and 4 groups optimal process parameters were obtained. The results show that, spindle speed influences the machined surface quality greatly and the 4 groups optimal process parameters differ greatly. In order to obtain high surface quality, combination method of the grinding parameters should be further researched.
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  Crystallization processes of nesquehonite whisker with high conversion of magnesium

  WANG Suping, XIAO Yin, WANG Shirong, LI Xianggao

  功能材料. 2016, 47(2): 2116-2124. https://doi.org/10.3969/j.issn.1001-9731.2016.02.024

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  As an important magnesium functional material, nesquehonite whisker has been widely used in many fields. Due to its almost perfect fibrous single crystal structure, nesquehonite whisker has great applied potential in aspects of reinforcement, insulation, retardant and modification of polymer materials, and can be used to prepare magnesium oxide whisker, high purity magnesium oxide and hydromagnesite. The nesquehonite whisker was prepared with high conversion of Mg²⁺ by the carbonation method under normal pressure using magnesium hydroxide as raw materials and sodium citrate as additive. The influence of crystallization temperature, sodium citrate content, reaction time, stirring speed on the conversion of Mg²⁺ and morphology of nesquehonite whisker was studied, and the effect of sodium citrate on crystallization process was also illuminated. The results show that the reaction temperature can be raised to 90 ℃ and the conversion of Mg²⁺ can be reached to 80% with the additive of 0.2wt% sodium citrate. The uniform nesquehonite whisker of which the aspect ratio was 28 and the crystallinity was 99.19% without Cl^- and Na⁺ was successfully prepared under the optimized crystallization time and stirring speed of 30 min, 200 r/min.
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  Sustained-release behavior of tea tree oil-chitosan composite materials

  GE Yan, GE Mingqiao

  功能材料. 2016, 47(2): 2125-2129. https://doi.org/10.3969/j.issn.1001-9731.2016.02.025

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  Four kinds of tea tree oil-chitosan composites were prepared using methods of air-drying and freeze-drying based on the main ingredients including tea tree oil and chitosan. We determined the release of terpinen-4-01 in vitro and used improved swelling controlled release kinetic models to fit and analyze the release behavior of materials in order to discuss the release mechanism of tea tree oil liposome/chitosan freeze-drying material. The results showed that improved swelling controlled release kinetic models could describe the release behavior of terpinen-4-01 in vitro from tea tree oil liposome/chitosan freeze-drying composite because R² was between 0.9584 and 0.9976. The distribution and combination mode of tea tree oil with composites would produce bias in model fitting. Terpinen-4-01 release depended on the distribution effect of terpinen-4-01 in liposome shell of tea tree oil liposome/chitosan freeze-drying material, resulting in the uniform and slow diffusion process of terpinen-4-01.
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  The effects of the lead-free glass powders on performances of copper electronic paste

  MENG Qing, QU Yinhu, CHENG Xiaole, LIU Xinfeng, ZHOU Zongtuan, CUI Hangbing

  功能材料. 2016, 47(2): 2130-2134. https://doi.org/10.3969/j.issn.1001-9731.2016.02.026

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  The effects of melting temperature and the contents of lead-free glass powders on the performances of the copper electronic paste was researched.The conductivity of the copper films of electronic paste is tested by four point probe method.The copper films is characterized by X-ray diffraction and metallographic microstructure analysis.And the adhesion between copper films and substrate is tested.The results shows that: lead-free glass powders with low melting point is beneficial to prevent the copper powders from being oxidized in the high temperature. Copper powders would be coated by residual organic carrier to antioxidize in the lower sintering temperature,so the copper films have density surface and good electrical conductivity. When content of lead-free glass powders is 8%,sheet resistance of copper films is 43.9 mΩ/□ and the adhesion between copper films and substrate is more than 10 N/cm².
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  The properties of hydrogen evolution of AuPdPt-WC/C nano composite catalyst in simulated seawater solution

  LIU Xiaowei, NIE Ming, NIE Chaoyin, CAO Youfang, ZUO Wenjing, LI Qing, DU shengjuan, LU Shun

  功能材料. 2016, 47(2): 2135-2138. https://doi.org/10.3969/j.issn.1001-9731.2016.02.027

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  To study the hydrogen evolution reaction (HER) from seawater electrolysis, nano-tungsten carbide promoted composite catalyst AuPdPt-WC/C was prepared by the direct chemical reduction methods. The hydrogen evolution property of the AuPdPt-WC/C electrode in simulated seawater was tested for the first time and proved with well catalytic activity. Cathodic polarization curves indicated that the AuPdPt-WC/C catalyst was of more positive hydrogen evolution over-potential and greater ability of depolarization than that of the commercial Pt/C catalyst. AuPdPt-WC/C catalyst expressed better performance for hydrogen evolution reaction in simulated seawater solution. The stability test showed that AuPdPt-WC/C nanocomposite catalyst in simulated seawater solution had a well stability.
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  Simultaneously improvingstrength and electrical conductivity in Al-Mg-Si-Cu alloy by combined deformation and aging

  CHEN Jing, CHEN Jianghua, LIU Chunhui, LAI Yuxiang, GU Yuan

  功能材料. 2016, 47(2): 2139-2142. https://doi.org/10.3969/j.issn.1001-9731.2016.02.028

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  Application of Al as an excellent conductor is restricted due to its low strength. With the increasing attention on Al in electric power industry, a variety of strategies have been proposed to obtain a better comprehensive property of electrical conductivity and strength. In this work, a combined deformation and ageing method, through which a simultaneous improvement in strength and electrical conductivity is achieved in Al-Mg-Si-Cu alloy, is developed by changing the sequence of traditional T6 temper. The differences in comprehensive property and microstructure between the T6 treated alloy and the one treated by our method are investigated by micro-hardness measurement, electrical conductivity test and transmission electron microscopy(TEM). The dislocations introduced by cold-rolling could tune the precipitation during subsequent ageing. The coarsened precipitates contribute to the enhancement in electrical conductivity while the retained dislocations increase the hardening potential of the alloys.
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  Research on the relative permeability of magnetorheological elastomer based on silicone rubber

  HUANG Xuegong, LIU Chun, WANG Jiong

  功能材料. 2016, 47(2): 2143-2147. https://doi.org/10.3969/j.issn.1001-9731.2016.02.029

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  The main feature of magnetorheological elastomer is that its stiffness and damping can be changed and recovered in real time and reversible control under applied magnetic field, and the relative permeability of magnetorheological elastomer is one of the important factors that affect the controllable range. This paper studies the permeability of different components magnetorheological elastomer based on silicone rubber. Based on analyzing the relative permeability measuring principle, the relative permeability testing system of magnetorheological elastomer based on resonance circuit was built, and the factors which affect the relative permeability of magnetorheological elastomer have been studied experimentally. The results show that the relative permeability of magnetorheological elastomer increases with additional content of magnetic particles and decreases with the increase of the magnetic-field intensity; considering the influence of filler on the material permeability, carbonyl iron powder is better than carbonyl nickel powder in the same weight percentage. Meanwhile, the relative permeability of magnetorheological elastomer increase with additional content of plasticizer.
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  The influence of different pH on the activation energies of Eu₂Zr₂O₇/ZrO₂(3Y) powders

  GE Lifang, MA Weimin, WEI Mingwei, ZHOU Yao, MA Lei, LI Jun

  功能材料. 2016, 47(2): 2148-2153. https://doi.org/10.3969/j.issn.1001-9731.2016.02.030

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  The Eu₂Zr₂O₇/ZrO₂(3Y) particles were prepared by NSC co-precipitation method; the crystallization and morphology of Eu₂Zr₂O₇/ZrO₂(3Y) particles were analyzed by XRD,DTA-TG, SEM; The synthesis kinetics was studied during the preparation under pH=11 and 12. The results show that the Eu₂Zr₂O₇/ZrO₂(3Y) particles are approximately spherical with higher crystallinity and better dispersibility under the conditions of V(Eu₂Zr₂O₇)∶V(ZrO₂(3Y))=15∶85, the initial concentration of mother liquor was 0.1 mol/L, the co-precipitation temperature is 0 ℃, the titration rate was 2 mL/min and the pH value is controlled at 11,when calcined at 1 100 ℃ for 2.5 h. In addition, the powders have an uniform granularity with a dimension of about 35 nm. The Doyle-Ozawa and Kissinger methods were used to calculate the apparent activation energy of each stage and the results of the three reaction stages of precursors prepared by pH=11 and 12 are 59.66,100,310.53 kJ/mol and 73.99,126.91,356.74 kJ/mol respectively.The grain growth activation energies for powders prepared by pH=11 and 12 are 18.96 and 23.90 kJ/mol severally, the former decreases 4.94 kJ/mol than the latter and performs the better sintering activities.
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  Performance research of oil-soluble organic molybdenum as multifunctional additive in lubricant

  XIA Di, CHEN Guoxu, CHENG Peng, WANG Xuechun, SHAO Yi, WANG Jing

  功能材料. 2016, 47(2): 2154-2159. https://doi.org/10.3969/j.issn.1001-9731.2016.02.031

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  Selected lab-made organic molybdenum additive (MSN) as research object, examined the solubility and corrosion resistance in formulated oil. The difference of extreme pressure, antifriction, antiwear and antioxidant properites between MSN and usal additives (NA451 and T202) were compared. The lubricating mechanism was also discussed by using SEM, EDX and XPS. The tests showed that, MSN possessed good solubility and no corrosion in formulated oil, which displayed excellent oxidation-resistance. MSN had better properties of tribological than NA451, T202 under the same test conditions. It was due to formed the mixed lubricating film what made of MoO₃, FeSO₄ and FePO₄ during the friction process with thermal decomposition reaction and surface friction chemical reaction.
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  Effect of laser scribing on core loss and magnetic domain of grain-oriented silicon steel

  YANG Fuyao, GU Lingyun, MA Guang, CHEN Xin, REN Yu, XUE Zhiyong

  功能材料. 2016, 47(2): 2160-2165. https://doi.org/10.3969/j.issn.1001-9731.2016.02.032

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  It is well known that laser magnetic domain refinement (LMDF) is an effective way to reduce the power losses of grain-oriented silicon steel. Although people have done a lot of research on LMDF, the relationship between laser parameters and core loss reduction as well as that between laser parameters and magnetic domain of grain-oriented silicon steel has not been studied in detail yet. The core loss and magnetic domain of grain-oriented silicon steel that refined by different laser parameters are investigated by soft magnetic testing system and domain viewer. The results show that the average core loss reduction rate of grain-oriented silicon steel reaches a maximum value and then decreases while increasing laser power and scribing spacing, and it decreases while increasing laser frequency and scanning speed. After laser scribing processing with different parameters, the width of magnetic domain of silicon steels all narrows down, and the eddy current losses of silicon steel sheet also decrease, leading to the reduction of the core loss of silicon steel sheet. The variation of magnetic domain width is changing consistently according to the change of core loss reduction rate. Furthermore, the optimized parameters of laser scribing were obtained, by which the average core loss of grain-oriented silicon steel can reduce 8%.
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  Preparation, characterization and properties of chelating fiber with iminodiacetic acid group

  DAI Libo, YUAN Siguo, GUO Miao, ZHOU Congzhang

  功能材料. 2016, 47(2): 2166-2170. https://doi.org/10.3969/j.issn.1001-9731.2016.02.033

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  A novel chelating fiber with iminodiacetic group was synthesized by reaction of sodium chloroacetate on fibrous NH₂-PP-ST-DVB matrix with the acid agent of ethylamine. The effects of sodium chloroacetate dosage, reaction temperature and time on the synthesis of iminodiacetic acid fiber were systematic studied, and the chemical structures and physical characteristics of the functional fiber were characterized by IR, EA, TG-DTG, SEM-EDS. The selective adsorption properties for nickel ion of chelating fiber were preliminarily researched by the column adsorption technology. The results showed that the sodium acetate group in IDA-PP-ST-DVB fiber could be up to 4.78 mmol/g and the static adsorption capacity for nickel ion was 102.6 mg/g at reaction temperature 90 ℃, time 4 h and the moles proportion (—NH₂/ClCH₂COONa) 1:16. The novel functional fiber has good adsorption selectivity for nickel ion in the coexisting calcium ion solution.
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  Carrier effective of mixed oxide supported La_0.8Ce_0.2MnO₃ catalytic for combustion of toluene

  WANG Yongqiang, XUE Yufen, ZHAO Dongfeng, ZHAO Chaocheng, LIU Fang, LI Shi

  功能材料. 2016, 47(2): 2171-2176. https://doi.org/10.3969/j.issn.1001-9731.2016.02.034

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  Supported La_0.8Ce_0.2MnO₃ catalysts were prepared by using TiO₂, CeO₂, CeO₂-TiO₂ mixed oxide as carrier. For the same loading, catalysts showed obvious different performance because of the different support. The La_0.8Ce_0.2MnO₃/CeO₂-TiO₂ exhibits the best catalytic activity. The light-off and complete conversion temperature is 140, 255 ℃ respectively. The relationship between the nature of supports and the catalyst activity were investigated by XRD, BET, SEM, NH₃-TPD, H₂-TPR. The results show that the pore structure, surface acidity and redox and oxygen storage capability of catalysts are the main factors affecting catalysts activity. Amorphous Ce_xTi_1-xO₂ solid solution exists in the form of Ce-Ti mixed oxides which has a smaller particle size, larger specific surface area and bore diameter. The surface acidity of the CeO₂-TiO₂ is enhanced obviously after Ce-Ti mixed up. These features enhance the synergistic interaction between the carrier and perovskite. Owing to the synergy, the lattice oxygen vacancy concentration of La_0.8Ce_0.2MnO₃/CeO₂-TiO₂ is increased significantly. It markedly enhances its capability of making catalyst oxidation and fundamentally improves the catalyst activity.
Process & Technology
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  Preparation of polysilicon from SiO₂ by the solid oxide oxygen ion-conducting membrane (SOM) method

  LAI Guanquan, ZOU Xingli, CHENG Hongwei, ZHENG Kai, LI Shangshu, GENG Shuhua, LU Xionggang

  功能材料. 2016, 47(2): 2177-2182. https://doi.org/10.3969/j.issn.1001-9731.2016.02.035

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  Silicon has been widely investigated and applied because it is of great strategic significance in the development of solar energy and photovoltaic industry. In this paper, the preparation of polysilicon from SiO₂ by the solid oxide oxygen ion-conducting membrane(SOM) method was investigated thoroughly. The results show that the pressure and the sintering temperature have significant influences on the electrolysis process of SiO₂ precursor. 0.3 g SiO₂ pellet prepared under 2 MPa and sintered at 900 ℃ for 4 h, can be electrolyzed to pure silicon within 2 h at 1 000 ℃ and 4.0 V, and the current efficiency reaches 82.3%. During the electrolysis process, the reaction routes consist of SiO₂Si and SiO₂CaSiO₃Si.
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  The preparation and properties study of polyurethane/organic vermiculite composites

  ZHANG Tailiang, LI Zefeng, DAI Shanshan, HUANG Zhiyu

  功能材料. 2016, 47(2): 2183-2187. https://doi.org/10.3969/j.issn.1001-9731.2016.02.036

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  Polyurethane/silicate composites are widely used recently. Using vermiculite (VMT) modified with octadecyl trimethyl ammonium bromide (OTAB) as precursor, the polycarbonate polyol (PCDL) were dispersed well in OTAB-VMT(OVMT)as soft segment by high-speed stirring and ultrasonic dispersion, 1,4-cyclohexane diisocyanate (CHDI) as hard segment, polyurethane/organic vermiculite composites were prepared by intercalating polymerization. The structure and properties of OVMT and PU/OVMT composites were characterized by the FT-IR, XRD, TGA, SEM and tensile strength test. The results showed that the layer spacing of OVMT increased to 2.37 nm and further enlarged to 2.92 nm by the loading of PCDL. The tensile strength composites reached 26.8 MPa, which increased 52.3% than PUCPB. The temperature resistance of composites was above 300 ℃.
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  Preparation and property characterization of chitosan/siRNA nanoparticles

  ZHANG Demeng, LOU Ruyun, WANG Yu, LIU Xiudong, YU Weiting, MA Xiaojun

  功能材料. 2016, 47(2): 2188-2192. https://doi.org/10.3969/j.issn.1001-9731.2016.02.037

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  With the preparation of Chitosan/siRNA nanoparticles based on electrostatic self-assembly, a nucleic acid dye assay with SYBR Gold was established to determine the condensation rate (CR) of siRNA in nanoparticles, and then the influence of n(N)/n(P) ratio, Mw, DD, pH and ion strength of chitosan solution on siRNA CR, nanoparticle size and zeta-potential was investigated by SYBR Gold assay, dynamic light scattering and laser doppler electrophoresis respectively. The results showed that CR rose from (18.6±4.0)% to (92.9±2.0)% as n(N)/n(P) increased from 0.5 to 2 and stayed stable even when n(N)/n(P) reached 150. When n(N)/n(P) was below 2, no stable nanoparticles were detected and the complex was negative charged, while n(N)/n(P) went from 5 to 150, the size of nanoparticles increased from (179.3±5.7) nm to (235.5±8.3) nm and zeta-potential rose from (17.2±1.3) mV to (23.6±0.9) mV. At n(N)/n(P) 150, CR raised with the increase of DD or with the decrease of Bc, the size of nanoparticles increased with the increase of Mw and decreased with the increase of DD or Bc, the zeta-potential of nanoparticles increased with the increase of pH value or DD but decreased with the decrease of Bc. It demonstrated that n(N)/n(P) ratio is the most important factor determining the size, zeta-potential and CR, and nanoparticles with the diameter ranging from 100-300 nm and zeta-potential ranging from 15-25 mV can be easily obtained via adjusting above parameters.
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  The synthesis and curing property of methyl-tri(phenylethynyl)silane

  WU Xiaole, TAN Dexin, XU Yuan, WANG Yanli, XING Honglong

  功能材料. 2016, 47(2): 2193-2196. https://doi.org/10.3969/j.issn.1001-9731.2016.02.038

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  Methyl-tri(phenylethynyl)silane ((PhCC)₃-Si-CH₃)(MTPES) monomer was synthesized with ethyl bromide, methyl trichlorosilane and phenylacetylene by Grignard reaction. The molecular structure was characterized by FT-IR spectroscopy, ¹H-NMR, ¹³C-NMR, and ²⁹Si-NMR. Its curing behavior was analyzed by non-isothermal DSC and the rheology. The results showed that the melting point of MTPES was 130 ℃ and MTPES had an excellent processability with the 200 ℃ processing window.
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  Preparation of TiN films via ammonia reduction nitridation process and their SERS effect

  CHEN Ying, WEI Hengyong, DONG Zhanliang, BU Jinglong, WANG Ruisheng, WEI Yingna, LIN Jian

  功能材料. 2016, 47(2): 2197-2200. https://doi.org/10.3969/j.issn.1001-9731.2016.02.039

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  Titanium tetrachloride was used as raw material, the TiN films were successfully prepared via ammonia reduction nitridation process. The TiN films were investigated by XRD, RAMAN,FE-SEM,TEM, SAED and UV-VIS-NIR. The crystalline phase of thin film was sodium chloride-type face-centered cubic structure. and the thickness of TiN films was about 250 nm. UV visible spectroscopy showed that the surface plasma resonance absorption peak appeared at 520 nm. In order to study the Surface enhanced Raman scattering activity of TiN, R6G was choose as probe molecule. The results showed that the TiN thin films had obvious SERS effect, comparing with the blank quartz substrate. The enhancement factor of TiN thin films was 6.08×10³,and the detection limit was 10^-6 mol/L.
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  Synthesis and characterization of ceria micro hollow spheres

  DENG Weijun, ZHANG Wenwen, CHEN Liang, HU Jiang, CHEN Donghui

  功能材料. 2016, 47(2): 2201-2205. https://doi.org/10.3969/j.issn.1001-9731.2016.02.040

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  Cerium (Ⅲ) hydroxide @ polystyrene micro spheres was synthesized via a co-precipitation process with additive of ammonia in a water bath. Cerium (Ⅳ) oxide micro hollow spheres were obtained upon calcination at temperature of 500 ℃ over two hours. The morphology, size, structure, crystallinity and FT-IR spectrum of Cerium (Ⅳ) oxide micro hollow spheres were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and FT-IR spectrograph. The formation mechanism was discussed. The results show that the diameters of the as-prepeared Cerium (Ⅳ) oxide micro hollow spheres are about 220 nm in diameter and 20 nm in shell thickness. The as-prepared samples are uniform, well dispersed and of high purity. TGA, DSC and FT-IR verify that polystyrene was completely decomposed. XRD shows that shell was highly pure and in crystal structure. Photodegradation experiments demonstrate that as-prepared sample has better photocatalytic activity.
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  Polymer modified asphalts before and after aging on the low temperature rheological property of asphalt

  LI Chao, WANG Lan, FENG Lei

  功能材料. 2016, 47(2): 2206-2211. https://doi.org/10.3969/j.issn.1001-9731.2016.02.041

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  Using ductility test (5 ℃), bending beam rheometer (BBR) and scanning electron microscopy (SEM) to study the low temperature rheological properties of composite crumb rubber (CCR), crumb rubber(CR) and SBS modified asphalt from macro and micro dimensions. The results show that: before aging, rubber powder and SBS modifier has good fusion with asphalt, the space grid structure of CCR was more irregular compared with CR and SBS, and after aging, the interface of modifier and asphalt was worse for both asphalts, interface bonding of CCR modified asphalt was batter than the others; when the temperature was above zero, CCR modified asphalt has the best low-temperature crack resistance among them, and then was SBS modified asphalt, CR modified asphalt was the worst wherever aging or not; but when the temperature was below zero, the low-temperature crack resistance of CR modified asphalt was batter than SBS modified asphalt instead; CR modified asphalt has larger influence on stiffness modulus (S) and higher temperature sensitivity than CCR modified asphalt and SBS modified asphalt on different aging effects.
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  The study on the preparation of ITO powder by spray pyrolysis

  ZHOU Chaojin, GUO Shenghui, ZHANG Lihua, PENG Jinhui, YANG Xingwei, ZHANG Libo, ZHANG Shengzhou

  功能材料. 2016, 47(2): 2212-2218. https://doi.org/10.3969/j.issn.1001-9731.2016.02.042

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  This experiment was conducted with the raw materials of InCl₃·4H₂O and SnCl₂·2H₂O, the solvent of water and the mixture of them as precursor solution. And the ITO powders were prepared with the joint method of micro-wave and ultrasonic wave spray pyrolysis in a tubular furnace heated by micro-wave.The influence of different micro-wave pyrolysis temperature and adding the surface active agent of ethanol on the change of microstructure has been analyzed. And the structural characteristics and microstructure of the product have been characterized with the help of TG-DSC,EDS, XRD, SEM and TEM.The results demonstrated that appropriate precursor solution concentration, temperature and proper quantity of additive are the key factors that have effect on the morphology of ITO powders. The extraordinarily fine ITO particles which have relatively small diameter, good dispersibility property and spherical shape morphology were prepared when the temperature was 650 ℃, concentration was 0.01 mol/L, the quantity of alcohol added was 30% and the a 200 mesh strainer was inserted.
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  Preparation and characterization of N/S-codoped SrSnO₃ for photocatalytic degradation of dyes under visible-light irradiation

  HUANG Qiufeng, XIAO Hanbing, ZHANG Xiaofeng, LIN Shen

  功能材料. 2016, 47(2): 2219-2223. https://doi.org/10.3969/j.issn.1001-9731.2016.02.043

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  N/S-codoped SrSnO₃ composite compound was successfully prepared by hydrothermal method. The resulting product was characterized by XRD, XPS and DRS. It was found that N element replace O lattice sites and S element enter into the interstitial sites of SrSnO₃ crystal, respectively. DRS observations showed that N/S-codoped SrSnO₃ was sensitive to visible-light irradiation. The photocatalytic activity was tested with photodecomposition of rhodamine B, methylene blue and orange II. The results indicated that 100% of RhB was degraded after 6h, 96% of methylene blue was degraded after 3 h and 93% of orange Ⅱ was degraded after 3.5 h in the presence of N/S-codoped SrSnO₃ composite materials under irradiation of visible light.
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  Characterization of diffusion bonded joint between commercial pure Ti and 304 stainless steel using Al interlayer

  XU Zhefeng, RONG Ju, YU Xiaohua, FU Tianlin

  功能材料. 2016, 47(2): 2224-2229. https://doi.org/10.3969/j.issn.1001-9731.2016.02.044

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  A Ti-Al-304 stainless steel composite panel with aluminum (Al) as the interlayer was made by means of the thermal diffusion. The manufacturing process briefly requires a 2 h incubation in vacuum system at 2 MPa and 550-650 ℃. The microstructure, distribution of elements, and phases composition of the cross section were studied by the scanning electron microscope (SEM), energy spectrum scan (ESC), and X-ray diffraction (XRD), respectively. The conclusion is that ca. 550 ℃ is the best condition for manufacturing Ti stainless steel composite panel through thermal diffusion. Under this condition, the interlayer (Al) can block the diffusion of Fe into Ti matrix, which forms fragile Fe-Ti intermetallic section. Meanwhile, a stable diffusing layer between Al and Fe is formed.
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  Synthesis of silicone oil modified by amino-polyether at terminal-side position and its microemulsion

  ZHAO Ying, LI Tongguo, CUI Qingqing, ZHANG Baochang, SONG Xiaofeng

  功能材料. 2016, 47(2): 2230-2234. https://doi.org/10.3969/j.issn.1001-9731.2016.02.045

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  Silicone oil modified by epoxy at terminal and pendant position was synthesized with homemade epoxy capping agent, octamethylcyclotetrasiloxane (D₄), and 3-gylcidylpropyl (dimethyl) methylsilane as raw material, and (CH)₄ NOH as catalyst. Amino-polyethers were introduced into the epoxy modified silicone oil by ring-opening reaction of amidogen and epoxy group. The chemical structure of product was confirmed by ¹H NMR and FT-IR. The amino polyether modified silicone oil was also made into microemulsion, and the effects of microemulsion parameters on average particle size, surface tension and light transmittance were investigated in detail.
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  Optimization on modification of sepiolite by microwave assisted ferrous sulfate treatment via response surface methodology (RSM)

  XU Sheng, FANG Liang, GONG Xiaofeng, LIU Chunying, CHEN Chunli, ZENG Xiaoxing

  功能材料. 2016, 47(2): 2235-2241. https://doi.org/10.3969/j.issn.1001-9731.2016.02.046

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  In order to determine the optimal preparation condition of optimization on modification of sepiolite by microwave assisted ferrous sulfate treatment via response surface methodology (RSM), the factors and their levels were established first by single factor experiment, and then RSM was used on the basis of single factor experiment via design concept of the Box-Benhnken center combination experiment with 3 factors and 3 levels design were performed. The result showed that, the optimal preparation condition of the modified sepiolite were as follows: the irradiation power 250 W, irradiation time 7 min, and the ferrous sulfate was added 2.68% to Pb²⁺ wasted water, the theoretical removal rate of Pb²⁺ under the conditions of sepiolite added 0.4 g and contacted time for 30 min can reach 99% and the actual value of removal rate was 95.5% respectively on the modified sepiolite in the 100 mL Pb²⁺ waste water at 100 mg/L.
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  Effect of chemical mechanical planarization material on sapphire polishing rate and roughness

  JIA Shaohua, LIU Yuling, WANG Chenwei, YAN Chenqi

  功能材料. 2016, 47(2): 2242-2246. https://doi.org/10.3969/j.issn.1001-9731.2016.02.047

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  The article adopted a new type of alkaline sapphire polishing slurry self-developed. FA/O nonionic surfactant added in the process of sapphire CMP can decrease sapphire surface roughness. Meanwhile, it realized high removal rate difference of convex and concave area on the condition that the decline trend of removal rate is not so obvious, which is benefit for achieving global planarization of sapphire. Obtain the optimum pH value that can realize relatively higher removal rate and lower roughness through experiment. Also effect of particle dispersion with same mass fraction and particle size and polishing temperature on sapphire removal rate and surface roughness was studied.
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  Stability of TiO₂-H₂O hybrid nanofluid

  SHAO Xuefeng, CHEN Ying, MO Songping, CHENG Zhengdong, YIN Tao, JIA Lisi

  功能材料. 2016, 47(2): 2247-2252. https://doi.org/10.3969/j.issn.1001-9731.2016.02.048

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  TiO₂ nanotubes (TiNTs) and TiO₂ nanosheets (TiNSs) were synthesized by hydrothermal method. TiNTs and TiNSs were dispersed in pure water to prepare hybrid nanofluid. Influence of TiO₂ concentration and concentration ratio of TiNTs to TiNSs on stability of hybrid nanofluids were investigated. Sedimentation velocities of nanoparticles were calculated by sedimentation height variation with time, and stability was appraised by sedimentation velocity. The result showed that nanofluids kept more stable at high concentration, and stability of hybrid nanofluids are more excellent than individual TiNSs and TiNTs nanofluids at high TiNTs to TiNSs concentration ratios, but hybrid nanofluids kept unstable at low TiNTs to TiNSs concentration ratios. Viscosity of nanofluids at different shear rate was measured to interpret the influence of concentration and concentration ratio of TiNTs to TiNSs on sedimentation of nanoparticles.
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  Catalytic property of immobilizedsalicyl hydroxamic acid-transition metal complex in oxidation of ethylbenzene by molecular oxygen

  WANG Ruixin, LEI Caiping, SHI Xiaohui, WANG Hongjing

  功能材料. 2016, 47(2): 2253-2257. https://doi.org/10.3969/j.issn.1001-9731.2016.02.049

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  Salicylhydroxamic acid (SHA) was covalently bounded onto the chloromethylated cross-linked polystyrene microspheres (CMCPS) through the Friedel-Crafts alkylation reaction, obtained SHA-functionalized CPS (SHA/CPS). Then the supported catalyst M-SHA/CPS was prepared by the coordination between SHA/CPS ligand and metal ions (Co(Ⅱ), Cu(Ⅱ), Fe(Ⅱ), or Mn(Ⅱ)). Catalytic performances of M-SHA/CPS for the heterogenous oxygen oxidation of ethylbenzene in the absence of solvent were investigated and compared in detail. The results showed that M-SHA/CPS could effectively activate dioxygen and obviously catalyze the oxidation of ethylbenzene. The electronic structure of central metal ion had a strong effect on the catalytic properties of M-SHA/CPS,and the yield of EBHP obtained using Fe-SHA/CPS as catalyst was up to 14% at 100 ℃. The catalytic activity was affected by the Fe-SHA/CPS concentration, additive concentration, and temperature. In addition, Fe-SHA/CPS had a good reusability.
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  Recycling and reusing of alcoholysis liquid waste in down-proof fabric’s pilot scale to re-degrade PET

  LV Yashu, YU Tianshi, ZHENG Jia, GE Mingqiao

  功能材料. 2016, 47(2): 2258-2262. https://doi.org/10.3969/j.issn.1001-9731.2016.02.050

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  In this paper, a set of 40L piolot plant was used to control the glycol alcoholysis of polyester fabric and recycling of glycol programmatically to degrade polyester, vacuum distillation was used to processes waste liquid which was from glycol degradation of Down-proof fabric,and the processing of waste liquid mixed with ethylene glycol in different proportion to re-degradable Down-proof fabric, analyzed the influence of alcoholysis liquid dosage to conversion rate, alcoholysis time; average molecular weight were characterized by measuring the hydroxyl value;the thermal stability of degradation product was measured by thermogravimetry analysis (TG). The results indicated that the recovered product from waste liquid was a major component of ethylene glycol terephthalate (BHET),allcontains dimer and trimer. When the proportion of alcoholysis liquid was 30%, the utilization of alcoholysis liquid was the largest, and ethylene terephthalate(BHET) monomers content in the alcoholysis product was 48.22%, its average molecular weight was 257.02 g/mol and the product yield was 75.47%.