30 September 2016, Volume 47 Issue 9
    

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    Focuses& Concerns
  • Study on band gaps of two-dimensional solid/solid phononic crystals with triangular-like lattices
    ZHAO Huanyu,CAO Xueqin,SONG Weibin,XU Zilong
    功能材料. 2016, 47(9): 9001-9006. https://doi.org/10.3969/j.issn.1001-9731.2016.09.001
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    In this paper the seven types of two-dimensional triangle-like lattices are classified by simple triangular lattice. The band gaps of antiplane modes for two-dimensional phononic crystals with triangle-like lattices composed of circular steel rods in epoxy are investigated by a plane wave expansion method. The isotropic band gaps and effect of the normalized radius on the band gaps are discussed. The numerical results show that the steel-epoxy phononic crystals with triangle-like lattices can open some the wider band gaps in the large frequency ranges. The maximum values of the band gaps in the lower frequencies are obtained if choosing the normalized radius 0.38 and 0.28. These findings of band gaps would provide the theoretical evidence to design new types of isolated materials.
  • Effects of the structures of monomer in interfacial polymerization on thestability of composite supported liquid membranes
    GAO Shiqiang, JIA Yue, LU Xiaolong, WU Chunrui, WANG Xuan,
    GAO Qijun, CHEN Huayan
    功能材料. 2016, 47(9): 9007-9011. https://doi.org/10.3969/j.issn.1001-9731.2016.09.002
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    This study prepared composite supported liquid membranes (CSLMs) by forming a hydrophilic layer on the surface of hydrophobic hollow fiber by interfacial polymerization(IP) method. The influence of IP process and the structures of monomers on stability of the CSLMs was studied. The basic properties of the composite membranes were characterized by zeta potential, contact angle, oil permeation rate, as well as the attenuation of mass transfer flux of the SLM process. The results showed that the negative charge on membrane surface and the mass transfer flux of positively charged metal ion (represented by Ni(Ⅱ)) increased when the immersion order is aqueous followed by oil. In SLM extraction experiments, the mass transfer flux of the unmodified SLMs decreased from 358.2 mg/(m2·h) to 0 within 30 h. Because of the strong hydrophilic carboxyle and soft chain of lysine, the CSLMs prepared by coating lysine on the support has a better hydrophilicity and, a better result in locking oil phase. Accordingly, the mass transfer flux reduced only 28.3% within 30 h. Therefore, composite membrane prepared by lysine has potential advantage in enhancing the stability of supported liquid membranes in long-term processes.
  • Study on the self-healing performances and swelling behavior of polyacrylic acid hydrogels
    HONG Haoqun, LI Xuesong, ZHANG Haiyan
    功能材料. 2016, 47(9): 9012-9016. https://doi.org/10.3969/j.issn.1001-9731.2016.09.003
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    The self-healable polyacrylic acid (PAA) hydrogels were prepared by micellar copolymerization of acrylic acid (AA) with a small amount of octadecyl methyl acrylate (OMA) in sodium dodecyl benzene sulfonate (SDBS) solution. Infrared spectrum was used to characterize the structure of PAA hydrogels. The tensile experiments were used to characterize the self-healing function and determine the tensile strength of PAA hydrogels. The swelling behavior of PAA hydrogels in water and sodium chloride solution was also investigated. Results show that PAA hydrogels had excellent self-healing performances. The self-healed PAA hydrogels could maintain the tensile strength higher than 80%. The elongation at break of self-healed PAA hydrogels approached that of untouched PAA hydrogels. The self-healing functions were attributed to the cooperation of network formed by the hydrogen bonding of carboxyl groups with network formed by the hydrophobic association of OMA and surfactant. The swelling of PAA hydrogels in water was dominated by the permeation and diffusion of water into the hydrogels. The swelling of PAA hydrogels in sodium chloride was dominated by the relaxation of chain segment of polymers.
  • Preparation and energy-saving effect evaluation of resin translucent concrete product
    ZHOU Zhi, GAO Xipeng, SHEN Juan, LI Zhonghua,YANG Huanyu
    功能材料. 2016, 47(9): 9017-9022. https://doi.org/10.3969/j.issn.1001-9731.2016.09.004
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    Development of new building materials is an important engine to promote the development of green energy efficient building. Based on the light transmission properties of the resin material, we designed a new type of resin translucent concrete products. In order to evaluate the energy saving effect of this type of resin translucent concrete products, we analyzed the lighting conditions and turn-off time of illumination devices of a laboratory that used the resin translucent concrete products with the help of Autodesk Ecotect Analysis software. The results show that after using the light-transmitting concrete products, the average daylight factor of the room can be increased by 30%; lighting uniformity upgrade 51%; the close time of artificial lighting devices within the natural light service period increased from 23% to 39%.
  • Coralloid-likehierarchically porous silicon for lithium-ion battery anode material
    HU Wen,HOU Hongying, YI Jianhong, ZHENG Biju, LI Fengxian
    功能材料. 2016, 47(9): 9023-9026. https://doi.org/10.3969/j.issn.1001-9731.2016.09.005
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    Industrially scalable fabrication of high-capacity silicon anode was the most critical and challenging aspect for its commercialization. In this report, a low-cost, high-yield and simple route was provided to synthesize silicon through air pyrolysis followed by magnesiothermic reduction of SiO2-F127 (EO106PO70EO106, a triblock copolymer) xerogel formed by a sol-gel reaction. Furthermore, a diazotization method is employed to coat the silicon with a carbon layer for use as hybrid anode material. X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), N2 sorption measurement and thermogravimetric analysis (TGA) were used to study the morphology and composition of the composite. The results indicate that the composite containing 76.3wt% Si has a coralloid-like micro-meso-macro hierarchically porous structure with a specific surface area of 123 m2/g. Electrochemical tests reveal that the as-prepared Si-C anode demonstrates specific capacity as high as 2 785 mAh/g, indicating improved electrochemical performance.
    • Review & Advance
  • The progress of organic molecular nanolayers ascopper diffusion barriers,part 2: characterization techniques
    WANG Yabin, LIU Zhong, LI Wu, DONG Yapin, HUANG Yudong
    功能材料. 2016, 47(9): 9027-9030. https://doi.org/10.3969/j.issn.1001-9731.2016.09.006
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    The investigations of organic molecular nanolayers (MNLs) as copper diffusion barriers are few researched, and the characterization techniques to analyze the MNLs are limitedly developed in China. Therefore, the techniques to characterize the MNLs were introduced in this mini-review, including thermal stable property, electrical property, interfacial adhesion, morphological observation and molecular simulation. The method and principle of determining interfacial adhesion were emphasized; the novel research interests arising from this technique were analyzed as well.
  • The research progress of Tin-based photocatalytic materials on the degradation of organic pollutants
    YAO Kaili, LI Jun, JIA Qingming, SHAN Shaoyun, SU Hongying, WANG Yaming
    功能材料. 2016, 47(9): 9031-9035. https://doi.org/10.3969/j.issn.1001-9731.2016.09.007
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    Tin sulfide, stannic phosphide are narrow band gap photocatalytic materials, can response to visible light, and even can realize the near-infrared absorption. While the band gap of Tin oxide material is wide, by means of doping and composite modification, also can widen the scope of its light response. Therefore, many researchers made a great deal of research work in tin-based function semiconductor materials, especially the preparation of low dimensional structure, nanoscale tin-based new materials and the photocatalytic performance. This paper systematically reviewed the research progress of tin oxide, tin sulfide, Stannic phosphide and other important tin-based photocatalytic materials in the degradation of organic pollutants, and their photocatalytic degradation mechanism. And putting forward some prospects and suggestions on the development of the tin-based photocatalytic materials.
  • Study on the special dispersion glass and application
    WANG Yanhang, ZU Chengkui,XU Xiaodian, ZHOU Peng, HE Kun
    功能材料. 2016, 47(9): 9036-9040. https://doi.org/10.3969/j.issn.1001-9731.2016.09.008
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    Special dispersion glass is thought to be a great potential material for long focus, wild field and high precision optical system because of its special optical parameter, excellent transmission and high deviation of the relative partial dispersion. The special dispersion nature aroused by inherent absorption in the ultraviolet and infrared regions and its progress of the native and foreign were reviewed. The typical application of special dispersion glass for lens material in advanced optical system to revise secondary spectrum was introduced. In addition, the prospect of special dispersion glass was outlined.
    • Research & Development
  • N-doped carbon materials: synthesis, structure and properties
    WU Cihang, ZHANG Chao, WANG Xinhai, ZHU Yanyan, LI Shuang, QIU Jieshan
    功能材料. 2016, 47(9): 9041-9050. https://doi.org/10.3969/j.issn.1001-9731.2016.09.009
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    Functional carbon materials with tuned structure and properties can be created by incorporating N atoms into the carbon matrix, which holds great promise in a number of fields and has drawn much attention around the world. This review has addressed the mechanism involved in the preparation of N-doped carbon materials, the strategies for making the N-doped carbon materials and their applications in hydrogen storage, supercapacitor, fuel cells, sensors and adsorption. The future trends are also briefly discussed.
  • Effect of pH value on graphene-containing composite materials for heavy metal ions adsorption
    CAO Mingli,SHENG Zhibo,ZHANG Huixia
    功能材料. 2016, 47(9): 9051-9056. https://doi.org/10.3969/j.issn.1001-9731.2016.09.010
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    Thepollution of heavy ions are hazardous to environment. Therefore, it is essential to tackle heavy-metal contamination. Graphene has excellent physical and chemical characteristics, which arouse wide attention in scientific community, so that graphene-containing composite materials could be served as an ideal absorbent, especially for heavy metal ions, due to its large specific surface area and mechanical strength. For the effect of graphene-composite materials on heavy metal ions, itis subject to many factors, such as contact time, temperature, pH value and so on, but the most relative important one is pH value. This paper not only gives an overview of the effect of pH value on adsorption of graphene-containing composite materials, but also discusses reason and effect mechanism.And, in the last of this paper, the challenges and application prospectsof graphene-containing composite materials are mentioned and commented.
  • Influence of V, N content and heat treatment on microstructure andmechanical properties of corrosion resistant pipe
    DONG Xiaoming, CHEN Yexin,ZHANG Zhonghua
    功能材料. 2016, 47(9): 9057-9062. https://doi.org/10.3969/j.issn.1001-9731.2016.09.011
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    The effect of V and N addition on microstructure and mechanical properties of microalloyed medium carbon steel at different normalized temperature had been studied. The results showed that even though the precipitation strengthening effect was promoted with the increase of V and N, the strength of material decreases and toughness was greatly improved. The amount of ferrite in V3 steel with higher V and N content is almost 6 times more than that of V1 steel with lower V and N content at normalized temperature of 950 ℃. However, the size of pearlite grains in V1 steel is about 3 times larger than that of V3 steel at 850 ℃. Meanwile, the content of ferrite and pearlite of material reduces and that of bainite increases at higher normalized temperature. It is obvious that increasing V and N content and decreasing normalized temperature is beneficial to the amount of ferrite and pearlite. According to analyses, the undissolved V(C,N) prevents coarsening of austenite grain, serving as nucleation of proeutectoid ferrite, promoting transformation of ferrite, inhibiting transformation of bainite. Subsequently, the ferrite and pearlite microstructure with good corrosion resistant property is formed, and the strength reaches up to 80ksi (552 MPa).
  • A model ofmagnetorheological elastomer based on chi-square distribution
    SUO Si,XU Zhaodong,XU Feihong
    功能材料. 2016, 47(9): 9063-9067. https://doi.org/10.3969/j.issn.1001-9731.2016.09.012
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    In order to describe the magnetorheological effect of magnetorheological elastomers accurately, and provide theory basis for the engineering application of MRE, a modified mathematical model is proposed based on the dipolar model. Analyzing the characteristic of ferromagnetic particles’ distribution in the elastomer, this model introduces n as a distribution parameter and assumes that the distance between two adjacent particles meets chi-square distribution, and the expression of magnetic-induced shear modulus is derived. This model overcomes the deficiency of the assumption that particles distribute uniformly in MRE, and it is simple in formation and apt for engineering application. Moreover, the expression of magnetic-induced shear modulus can reflect the law between the magnetorheological effect and each influence factor exactly, and results show the distribution parameter and magnetic intensity are the key factors.
  • Effect of catalyst on carbon nanotube and its electrochemical energy storage
    JIANG Xue, JIANG Qi, CHEN Jiankang,CHEN Zi, DENG Min,
    CAI Yudong, LU Xiaoying
    功能材料. 2016, 47(9): 9068-9072. https://doi.org/10.3969/j.issn.1001-9731.2016.09.013
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    The two catalyst precursors of LaNiO3 of hexagonal structure and La2NiO4 of tetragonal structure were fabricated by citrate method,the two patterns of carbon nanotubes(CNT)were made by chemical vapour deposition technique. XRD method was emploied to analyse the crystal structure of the catalysts and the catalyst precur-sors,TEM, pore surface area analyzer were used to analyse the morphology and pore structure of CNT,the two forms of CNT were respectively assembled to supercapacitors,then tested the electrochemical energy storage performance. The results showed that the LaNiO3 and La2NiO4 were reduced to two Ni metal nanoparticle catalysts with different (111) crystal face parameter at high temperature. And the two Ni metal nanoparticle catalysts could grow CNT. But the obtained CNTs had different yield, morphology and structure, pore structure parameters and electrochemical energy storage performances at the same preparation conditions. The research results could be obtained as the followingthere was a direct relationship between the CNT catalyst and CNT yield, morphology structure, pore structure parameters. There was a direct relationship between the CNT electrochemical energy storage performances and CNT morphology, pore structure parameters.
  • 3D geometry modeling method of closed-cell foam based porosity accumulation
    YU Kuahai,LIU Fen
    功能材料. 2016, 47(9): 9073-9078. https://doi.org/10.3969/j.issn.1001-9731.2016.09.014
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    This paper proposes a new 3D geometry modeling method of closed-cell foam material based on stochastic algorithm, with the cavity shape of spheroid. Uniform space partition method constructs the stacked unit cell space, then generate one spheroid in each unit cell to construct the basic geometry of foam, by defining the uniformity factor to control its randomness. Porosity accumulation method is developed to make the porosity reach to the target step by step, by central unit cell generate several spheroids randomly each time and intersection determination to retain the feasible geometry in each step. Porosity adaptive increasing algorithm based optimization method is also proposed to improve the modeling efficient. Besides, large cavities and overlapping flaw geometry models are also developed, considering the actual foaming process and structure features of foams.
  • Flame retardant synergisms betweenaluminium diethlyphosphinate andhyperbranched derivative of triazine group in PBT
    XU Bo, CHEN Yajun, XIN Fei, QIAN Lijun
    功能材料. 2016, 47(9): 9079-9084. https://doi.org/10.3969/j.issn.1001-9731.2016.09.015
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    Flame-retardant poly(butylene terephthalate) (PBT) composites had been prepared by combination of aluminium diethlyphosphinate (AlPi) and hyperbranched derivative of triazine group (EA). The flame retardancy of the composites was investigated by limiting oxygen index (LOI), UL-94 vertical burning test and Cone calorimeter tests. The thermal behaviors were investigated by thermogravimetric analysis (TGA). Morphology of char combustion of flame-retardant PBT was observed by SEM. The results show that when the mass ratio of AlPi and EA is 7∶3, flame-retardant effect of composites is best, with an increased LOI value (32.6%), a UL-94 V-0 rating and a decreased HRR value (653 kW/m2).The analysis of thermal decomposi tion shows that the addition of AlPi and EA results in an earlier char formation process during fire tests and the synergistic effect increase the char residue. The SEM of char layer shows that a dense and compact intumescent char layer has been formed by the synergism between AlPi and EA, and then the flame-retardant effect is improved.
  • Preparation and adsorption of Cd2+ of attapulgite modified by AMPS
    ZHANG Ping, SHI Yuerong, ZHANG Guifang, LV Chao, QIN Yingxi,
    ZHAO Yiping, CHEN Li
    功能材料. 2016, 47(9): 9085-9090. https://doi.org/10.3969/j.issn.1001-9731.2016.09.016
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    A novel organic modified attapulgite (ATP-g-AMPS) composite was synthesized and investigated for adsorption of Cd2+ from aqueous solutions. To improve the adsorption capacity of heavy metal ions and dispersion in organic solvent, the coupling reagent KH-570 was used to introduce ethylene groups onto the ATP surface before the graft polymerization was initiated,and the anionic monomer 2-Acrylamido-2-methyl propane sulfonic (AMPS) was grafted by double bond addition reactions. Organic modified attapulgite was characterized by Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and thermo-gravimetric analysis (TG). Adsorption of heavy metal ion Cd2+ onto the modified attapulgite was studied. The result shows that the anionic monomer was mainly grafted on the surface of ATP without changing its crystal structure. In addition,ATP-g-AMPS showed better adsorption properties for Cd2+ than the pure ATP.
  • Fabrication and I-V characterization of Mg2Si/Si heterojunction
    WANG Shanlan, LIAO Yangfang, WU Hongxian, LIANG Feng,
    功能材料. 2016, 47(9): 9091-9094. https://doi.org/10.3969/j.issn.1001-9731.2016.09.017
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    DC-magnetron sputtering;Mg2Si/Si heterojunction; I-V characterization
  • Studyof the preparation of cellulose and its ester grafted PEG copolymers phase change material
    XU Sumei, Halidan Maimaiti, Minawar Wumaier,Luptula Wushuer
    功能材料. 2016, 47(9): 9095-9099. https://doi.org/10.3969/j.issn.1001-9731.2016.09.018
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    This study based on the preparation of Cell-OH/PEG,CDA/PEG and LACE/PEG as solid-solid phase change materials (PCMs) for latent hea energy storageby solution graft copolymerization in the presence of Toluene diisocyanate (TDI) was described.The differences of the structures,crystallization properties and phase change energy storage performance of the obtained three products were characterized using Fourier transforminfrared (FT-IR) spectroscopy,Transmission Electron Microscopy(TEM),polarized optic microscopy (POM), Wide angle X-ray diffraction (WAXD) patterns and differential scanning calorime (DSC) techniquesetc.The results showed that the products showed a stronger capsule trend of the formation of ester chain wrapping PEG with the growth of PEG and graft polymerization of cellulose ester chain, which also showedthe smaller the degree of damage to the PEG crystallization, consequentlythe higher the phase transition enthalpy of the product.
  • Synthesis of arsenical natroalunite solid solution and mechanism of arsenic incorporation in natroalunite
    LUO Zhongqiu, ZHOU Xintao, JIA Qingming, HAO Xutao,
    功能材料. 2016, 47(9): 9100-9105. https://doi.org/10.3969/j.issn.1001-9731.2016.09.019
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    Arsenate-for-sulfate substitution in natroalunite has been a new method for arsenic immobilization/stabilization. Precipitation of arsenical natroalunite was synthesized using sodium sulfate (Na2SO4), aluminum sulfate (Al2(SO4)3·18H2O) and sodium arsenate (Na3AsO4·12H2O) as sources of Na, Al and As, respectively. The effect of (As/(As+S))aq molar ratio in the initial aqueous medium was investigated. The synthetic precipitates were characterized by XRD, ICP, SEM-EDS, FT-IR and TG-DSC. The results indicated that arsenic precipitated almost exclusively as natroalunite, and arsenic incorporation in natroalunite increased with the (As/(As+S))aq increased in the (As/(As+S))aq molar ratio range 0 to 0.178. The maximum arsenic substitution observed in the natroalunite structure was 8% molar. When n(As/(As+S))aq=0.185, a mixture of natroalunite, amorphous phase and mansfieldite was formed and the arsenic incorporated up to 14% molar in the natroalunite phase. Moreover, mechanism of arsenic incorporation was thought that AsO3-4 directly substituted for SO2-4 in the natroslunite structure, the difference between AsO3-4 and SO2-4 charge maintained balance by appropriate amounts protonation of hydroxyl (OH-). It also elucidated that the c and V unit cell parameters expanded slightly with AsO3-4-for-SO2-4 substitution increased in the natroalunite crystal structure, due to the larger As-O distance (0.1682 nm) than S-O distance (0.1473 nm).
  • Effect of Cr-doping on the optical bandgap andabsorption spectra of ZnO
    GAO Yihan,HOU Qingyu,ZHAO Chunwang
    功能材料. 2016, 47(9): 9106-9111. https://doi.org/10.3969/j.issn.1001-9731.2016.09.020
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    The studies of absorption spectra of Cr-doped ZnO have presented two contradictory experimental results, which are the red shift and blue shift on the optical bandgap and absorption spectra when the mole fraction of Cr increases in a range from 0.0313 to 0.0625. To solve this contradiction, based on the first-principles plane-wave pseudopotential of the spin-polarized density functional theory (DFT), we set up four models for Zn1-xCrxO (x=0, 0.0313, 0.0417, 0.0625) to calculate the band structure, density of state, difference charge density, population and absorption spectra using the method of generalized gradient approximation (GGA+U). The calculation results indicate that with the increase of mole fraction of Cr in a range from 0.0313 to 0.0625, the lattice parameters and the volume of doping systems increases, the total energy decreases, the formation energy decreases, thereby the doping becomes easier, and the doping system becomes more stable. Meanwhile, the optical bandgap of the doping system becomes wider, which suggests that absorption spectra of Cr-doped ZnO systems would have a blue shift. The calculation results are consistent with the experimental data. And the contradiction of blue shift and red shift of Cr-doped ZnO systems has been explained reasonably. These results may contribute to improve the design and the preparation of short wavelength optical devices from Cr-doped ZnO.
  • Study on modification of carbon fiber and performance of carbon paper as gas diffusion layer
    HU Zhijun,LIN Jiang, ZHANG Yan,HU Guilin
    功能材料. 2016, 47(9): 9112-9116. https://doi.org/10.3969/j.issn.1001-9731.2016.09.021
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    The effects of oxidation-coupling modification on carbon fiber(CF) were investigated according surface morphology, charge characteristics, dispersion and the conductivity of paper. At the same time, the permeability and pore size distribution of carbon paper were discussed by the ratio of CF, CF length and the loading of carbon black. The pre-oxidation treatment of KClO3-H2SO4 produces an etching effect on the fiber surface, generates potholes in crystal defect parts, and forms axial grooves. Coupling agent KH-550 attaches on the groove in particulate, the obvious increase of absolute value of zeta was observed, electrostatic repulsion between the CFs was strengthened, the dispersion of CFs was improved, and the electrical conductivity of the carbon paper had also been improved. The length of CF and the loading of carbon black can effectively adjust the permeability and pore size distribution of carbon paper.
  • Effects of hydrogen peroxide and pH on corrosion behavior of a biodegradable as-extruded Mg-0.5Sr alloy
    ZHAO Chaoyong, PAN Fusheng, ZHANG Lei, TANG Aitao
    功能材料. 2016, 47(9): 9117-9121. https://doi.org/10.3969/j.issn.1001-9731.2016.09.022
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    A simulated physiological environment after implantation was used, and the effects of H2O2 and pH on the corrosion behavior of a biodegradable as-extruded Mg-0.5Sr alloy in Hank’s solution were investigated by using immersion test, potentiodynamic polarization test and electrochemical impedance spectroscopy test. The results showed that the addition of H2O2 in Hank’s solution with different pH (7.4 and 5.2) promoted the corrosion reaction, and a higher H2O2 concentration further accelerated the corrosion reaction. The lower pH not only resulted in a higher corrosion rate of magnesium alloy, but also changed its corrosion mechanism. The present investigation indicated that the simulated physiological environment after implantation accelerated the corrosion of magnesium alloy implants, which provided us some important information about design, selection and clinic use of biodegradable magnesium alloy orthopedic implants.
  • Electrospinning preparation of V2O5 doped Bi2WO6 micro-nanofiberand their photocatalytic activity
    CUI Yanli, SUN Fengxia, HAN Xue, GU Ruirui, ZHAO Guolong, ZHOU Defeng
    功能材料. 2016, 47(9): 9122-9127. https://doi.org/10.3969/j.issn.1001-9731.2016.09.023
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    Bi2W1-xVxO6-δ micro-nanofiber were fabricated via calcining the as-synthesized precursors fibrous mat prepared by electrospinning technique route using Bi(NH3)2C6H7O7·H2O, H42N10O42W12,NH4VO3 and PVP as regent. The obtained samples were characterized by X-ray diffraction (XRD),Fourier transform infrared spectroscopy (FT-IR), Field emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS) and Ultraviolet-visible diffuse reflectance spectra(UV-Vis). The photocatalytic activity of Bi2WO6micro-nanofiber toward the decomposition of Methylene Blue(MB)was investigated.The results indicated that doping V2O5 could improve the catalytic properties of the Bi2WO6 catalyst. The results revealed that 3%(V-W at.) VO2.5 doping exhibited the highest photocatalytic activity under visible light irradiation. After visible light irradiation for 120 min, the degradation rate of MB (10 mg/L) reached 86.9%, improved 15% comparing to the pure Bi2WO6 sample.
  • Synthesis, characterization and propertiesof fluorine modified waterborne polyurethane
    QIANG Taotao,TANG Hua, REN Longfang
    功能材料. 2016, 47(9): 9128-9131. https://doi.org/10.3969/j.issn.1001-9731.2016.09.024
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    A novel fluorinated polyurethane (FWPU) was synthesized in which isophorone diisocyanate (IPDI) and polyethylene tetrahydrofuran (PTMEG, Mn=2 000) were as raw material, dihydroxy methyl propionic acid (DMPA) was as hydrophilic monomer and fluoride glycol (Rf(OH)2) was as the modifier. The influences of the Rf(OH)2 content on the properties of polyurethanes were studied. The water contact angle was increased from 80.72° to 99.35° with the increase of Rf(OH)2 groups.Water absorption was reduced by 6.6%. Particle size distribution (PSD) analysis indicated that the particle size of FWPU films first increased then decreasesd. When the content of Rf(OH)2 was 3.0wt%, the particle size is 147 nm. XRD,AFM and DSC were used for characterization of the FWPU films to verify the results. Showed that multiphase structure existed in the fluorinated polyurethane,the thermal stability and crystallinity of fluorinated polyurethane glue film was increased.
  • Influence of new interpenetrating polymer networks on the paper strengthing properties
    LIU Yan, SHEN Yiding, FEI Guiqiang, WANG Haihua, FAN Dan
    功能材料. 2016, 47(9): 9132-9137. https://doi.org/10.3969/j.issn.1001-9731.2016.09.025
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    With using polyamide epihalohydrin resin as reaction agent and ammonium persulfate as initiator, cationic crosslinking PAE/CPAM interpenetrating polymer network (IPN) was prepared by the free radical polymerization method of glycidyl methacrylate(GMA), acrylamide (AM), methacryloyloxyethyl trimethyl ammonium chloride (DMC) as monomers. The free radical polymerization could be epoxided by means of Fourier transform infrared spectroscopy(FT-IR);The scanning electron microscopy(SEM) photographs show that the mixtures with different mass ratios of PAE and CPAM present a spatial network structure. What is more, the mass fraction of PAE resin is 60.56%, the addition quantity of AM is 2.42%, the addition quantity of DMC is 2.42%, the reaction temperature 70 ℃, reationing 3 h. Cationic interpenetrating polymer network polymers product of 30% solid content is applied in the paper, when the addition quantity of IPN is 1%,The dry and wet tensile index increased by 17.44% and 26.78%, folding resistance degree by 39.84%, tearing index by 71.97%, the burst index by 41.49%.
  • Research on the mechanical propertiesof thermoplastic starch-based composite
    XU Jie, GUO Anfu, LI Jianfeng, LI Fangyi, ZHANG Chuanwei,
    功能材料. 2016, 47(9): 9138-9142. https://doi.org/10.3969/j.issn.1001-9731.2016.09.026
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    Thermoplastic starch-based composite which has the characteristics of using green raw materials and full degradation of composite materials after being abandoned has become a hot research topic at home and abroad. By analyzing the static compres-sion curves of composites obtained by static compression tests using formamide, urea, glycerol and ethylene glycol as plasticizer, the effect of thermoplastic starch (TPS) made by different proportions of single plasticizer and compound plasticizer on the cushioning properties of composites were studied. The experiment results shown that when the content of single plasticizer was 15%, the bearing capacity of four kinds of composites made by single plasticizer wasFPTPS composite>UPTPS composite>EGPTPS composite>GPTPS composite. When the content of compound plasticizer was 15%, the bearing capacity of four kinds of FUPTPS composites made by different mass ratios of formamide and urea was2∶1＞1∶1＞1∶2, and the bearing capacity of four kinds of GGPTPS composites made by different mass ratios of glycerol and ethylene glycol was1∶2＞2∶1＞1∶1.
  • Preparation of graphene transparent flexible conductive film via liquid surface deposition
    YUAN Chunqiu, ZENG Wenjin, TANG Wei, ZHAO Chunyan, MO Shenbin,
    功能材料. 2016, 47(9): 9143-9148. https://doi.org/10.3969/j.issn.1001-9731.2016.09.027
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    Transparent conductive film are widely used in electronics industry. Here we reported the Graphene oxide thin films were prepared on flexible substrates PET by liquid deposition method, the graphene transparent conductive film were achieved after hydrogen iodide (HI) vapour reduction at room temperature. Several kinds of characterization (including SEM, TEM, AFM, UV-Vis and resistance analysis (four-probe method)) were employed to study the relationship between transmittance and conductivity with different deposited layers of graphene films. The results show that the conductive of the graphene film will be increased with the more layers of deposited graphene, but the light transmittance of films decreased. The conductivity of the graphene transparent film was 620 Ω/□ with 82.22% in light transmittance (λ=550 nm) were achieved.
    • Process& Technology
  • Surface vitrification of Fe36Co36Si4.8B19.2Nb4 alloy and its propertiesby electrical discharge machining
    ZOU Shanfang, ZHANG Tao
    功能材料. 2016, 47(9): 9149-9152. https://doi.org/10.3969/j.issn.1001-9731.2016.09.028
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    Surface vitrification of Fe36Co36Si4.8B19.2Nb4 alloy with high glass-forming ability (GFA) was achieved by electrical discharge machining (EDM), obtaining amorphous layer with thickness of 7.0 μm. The effects of the pulse duration and the pulse interval on the phase structure and morphology of the surface layer were investigated and the optimum parameters of electrical discharge machining were established for Fe36Co36Si4.8B19.2Nb4 alloy. Investigations on the hardness and corrosion behavior of the surface for the treated Fe36Co36Si4.8B19.2Nb4 samples indicate that the amorphous surface of alloys treated with pulse duration of 64 μs and pulse interval of 4 μs exhibits high hardness of HV 1680,50% more than that of the substrate and outstanding corrosion resistance with a wide passive region of more than 1.6 V. This study provided theoretical and experimental foundation for the formation of amorphous layer on other metallic materials treated by electrical discharge machining
  • Effects of silica on phase transformation and microstructure of zirconia fiber
    CAI Wuji, HE Jing, YUAN Mengjiao, ZHOU Tong, CHEN Lifu
    功能材料. 2016, 47(9): 9153-9157. https://doi.org/10.3969/j.issn.1001-9731.2016.09.029
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    Zirconia fibers containing different amount of silica are prepared using zirconium oxychloride, hydrogen peroxide and silica sol as the raw materials and by sol-gel method. SEM, XRD, DTA, FT-IR, 29Si NMR and TEM are used to characterize the zirconia-silica fibers. It has been found that silica can significantly stabilize the tetragonal ZrO2 phase, inhibiting its phase transformation to the monoclinic phase. As the consequence, the formation of sheath-core structure in the zirconia-silica fibers has been prevented. Silica can also effectively inhibit the grain growth, resulting in crack-free, transparent, dense and flexible ceramic fibers.
  • Synthesis and self-assemble of thermosensitive galactose block polymer
    ZHOU Kaichun,XU Muru, WU Junzi, QUAN Jing
    功能材料. 2016, 47(9): 9158-9162. https://doi.org/10.3969/j.issn.1001-9731.2016.09.030
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    The glycomonomer 6-O-vinylazelaic-D-galactopyranose (OVZG) was synthesized by lipase catalyzed transesterification of divinyladipate with D-galactopyranose. PDEGMA-b-POVZG with narrow polydispersity (PDI) and obvious thermosensitivity was effectively prepared via enzymatic synthesis combined with reversible addition-fragmentation chain transfer (RAFT) polymerization. The structure and molecular weight of the synthesized glycopolymer were characterized by 1HNMR, FT-IR and gel permeation chromatography (GPC), respectively. Measurement by dynamic light scattering (DLS) and transmission electron microscopy (TEM) revealed that PDEGMA-b-POVZG was able to self-assemble into nano-micelles with well-defined structure and uniform size in aqueous solution. UV-Visible spectroscopy tests showed that the low critical solution temperature (LSCT) of the polymer can be controlled by the molar ratio of monomers. Especially, as the molar ratio of PDEGMA and OVZG was 1∶63, the LCST of PDEGMA-b-POVZG could be 33 ℃ in aqueous solution. The results demonstrate that PDEGMA-b-POVZG can form nano-micelles in the human body environments, which may have potential as functional drug carriers.
  • Effect of aging temperature on the microstructure and properties of Mn20Cu5Ni2FeCe alloy
    LU Fengshuang,WU Bin,ZHANG Jianfu,LI Ping,ZHAO Dongliang
    功能材料. 2016, 47(9): 9163-9165. https://doi.org/10.3969/j.issn.1001-9731.2016.09.031
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    After proper heat treatment, MnCu alloys could exhibit excellent damping and mechanical properties. In this paper, Mn20Cu5Ni2FeCe alloy was prepared by vacuum melting, and the effect of aging temperature on the microstructure and damping property of the alloy were investigated by XRD, TEM and DMA techniques. It is shown that the as-quenched Mn20Cu5Ni2FeCe alloy has a single fcc phase structure, with tanδ of less than 0.01. During aging process spinodal decomposition occurs and Mn-rich phase precipitates from the matrix phase. The damping capacity was significantly improved and the value of tanδ reaches 0.045 when aging at 400 ℃. The results indicated that the damping capacity of the alloy increases with the decrease of the testing environment temperature, implying that the Mn20Cu5Ni2FeCe damping alloy could possess good application prospects at low temperature.
  • The surfacefunctionalization of expandable graphite and its application in flame retardant polypropylene
    WANG Dezhao,ZHANG Yiyin,ZHONG Dewei,WU Wenxin,QI Fei,
    CHEN Xiaolang,LIAO Qiuhan
    功能材料. 2016, 47(9): 9166-9170. https://doi.org/10.3969/j.issn.1001-9731.2016.09.032
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    In this work, expandable graphite (EG), functionalized by using organic synergistic flame retardant (OSF), as a flame retardant, was filled into polypropylene (PP) composites. The structure and morphology of the modification EG (MEG) particles were characterized by FTIR and SEM. The results showed that the OSF was grafted into the surface of EG, and the layer structure of EG was complete. The influences of MEG on the flammability, thermal stability, crystallization, and mechanical properties of PP materials were investigated and discussed by limiting oxygen index test (LOI), UL-94 vertical flame test, TG and DSC and mechanical property tests. The results showed that MEG was an effective flame retardant. The LOI values of PP/MEG composites increased with increasing the MEG content, and the UL-94 V0 rating was obtained when the content of MEG was more than 20wt% in the flame retardant PP composites due to the complete and compact intumescent charred residues on the surface of PP/MEG composites after combustion. The TG data showed that the addition of MEG improved the thermal stability and charred residues at high temperature. The MEG particles have the heterogeneous nucleation effect on PP, and the melting temperature and crystallinity of PP were affected by MEG. The data from the mechanical property test showed that the addition of MEG deteriorated the tensile strength, elongation at break, and impact strength of PP.
  • Preparation of graphene under the continues stable disperse state
    DENG Chuan,YIN Li,GE Xiaoling
    功能材料. 2016, 47(9): 9171-9175. https://doi.org/10.3969/j.issn.1001-9731.2016.09.033
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    In order to analyze and eliminate the effect of aggregation of graphite to the yield of graphene, the graphene dispersion were prepared under the continues stable disperse state and non-continues stable disperse state. The aggregation of graphite during the preparation process was characterized by zeta potential. The disperse state of graphite dispersion was studied by measuring its absorbance. And the prepared graphene structures were characterized by atomic force microscope. Results show that the surface area of graphite is increased by exfoliating the graphite sheets, leading to the increasing of potential energy of aggregation of graphite and the decrease of the efficiency of exfoliation and graphene yield. The increasing potential energy of aggregation was overcame by continues stable dispersing, and the yield growth rate of graphene in top graphene dispersion reached at 21.9% by mechanical exfoliating graphite sheets for 4 h. The monolayer graphene with thickness of 1-2 nm was prepared, which show well structural integrity and free of aggregation. The method of continues stable dispersing gives a theoretical and practical guide for high-yield preparation of graphene.
  • Synthesis of bottom ash-based geopolymer Co-activated by double salts
    ZHANG Yaojun,CHAI Qian, YANG Mengyang,FAN Bowen,LI Xin
    功能材料. 2016, 47(9): 9176-9181. https://doi.org/10.3969/j.issn.1001-9731.2016.09.034
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    The bottom ash-based geopolymer with excellent mechanical properties was studied by using bottom ash as only one raw material and double salts of Na2SiO3/Na2SO4 as co-activator in the paper. When the dosages of co-activator were 7.74wt% Na2SiO3 and 0.5wt% Na2SO4, the bottom ash-based geopolymer showed the best compressive strength of 46.94 MPa, which increased by 15.8% comparing to the sample obtained by single Na2SiO3 activation in curing age of 28 d at room temperature. The XRD, IR and SEM results revealed that the co-activation of double salt accelerated the hydration reaction of mullite and lime in bottom ash to produce both fibrous attringite (AFt) and a large amount of amorphous geopolymer gel so as to lead to the displacement of asymmetric stretching vibration and bending vibration absorptions of Si—O bonds.
  • Synthesis and characterization of new nonylphenol series cationic and amphoteric asphalt emulsifiers
    LIANG Bo, WANG Weihua, LU Decai, ZHANG Wei, LI Zhong, LIU Shujie, LI Junping,
    LIANG Yue, WANG Mei
    功能材料. 2016, 47(9): 9182-9186. https://doi.org/10.3969/j.issn.1001-9731.2016.09.035
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    Nonylphenol (NP for short) and diethylamine were used as raw materials to synthesize one cationic and three amphoteric asphalt emulsifiers. The structure of emulsifiers was investigated by FT-IR and bromophenol blue experiment. Active principle in reaction products was determined by chemical titration. Emulsifiers synthesized in the paper were used for preparing emulsified asphalt. The performance including emulsifying effectiveness, storage stability, mixing stability, normal viscosity, asphalt content, residues on screening and the property of wrapping coarse aggregate was tested. The results demonstrated that the three emulsifiers have good properties. One of them can be used as a moderate-setting asphalt emulsifier; others can be used as slow-setting asphalt emulsifiers.
  • Preparation of alumina tritium permeation barrier coating on 1Cr18Ni9Tistainless steel by magnetron sputtering and micro-arc oxidation
    WU Yanping,WANG Qingfu,JIANG Chi,WANG Qinguo, WU Quanwen
    功能材料. 2016, 47(9): 9187-9191. https://doi.org/10.3969/j.issn.1001-9731.2016.09.036
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    Aluminium coating was prepared on stainless steel by magnetron sputtering technology.The alumina coatings were synthesized by micro-arc oxidation technology at different arc starting voltage and processing time.The film surface morphology and structure were investigated by SEM and XRD.The results show that the aluminium films are compact and smooth.The alumina coatings are composed of inner compact layer and outer loose one.The outer layer is γ-Al2O3 due to the high cooling rate. The inner layer is α-Al2O3 because of the low cooling rate caused by the heat preservation of outer γ-Al2O3. The coatings are the mixture of α-Al2O3 and γ-Al2O3.The content of α-Al2O3 is increased with the coatings thickness increasing.
  • Preparation of the hydrogen containing phenyl silicone resin and its application in coatings
    WANG Tingting, AN Qiufeng, ZHANG Bei, PAN Jiayan
    功能材料. 2016, 47(9): 9192-9196. https://doi.org/10.3969/j.issn.1001-9731.2016.09.037
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    The hydrogen containing phenyl silicone resin (HPSR) was synthesized with hydrolysis-polycondensation method from phenyltriethoxysilane (PTES), methyltriethoxysilane (MTES), teteamethylcyclotetrasiloxane (D4H), octamethylcyclotetrasioxane (D4), hexamethyldisiloxane (MM) and teteamethyldisiloane (D2H) in the presence of solid acid catalyst, which has different content of Si—H and D chain respectively. The structure of the polymer was characterized through FT-IR and 1H NMR. The HPSR and vinyl silicone rubber (VPS) was mixed with the molar ratio of n(Si—H)∶n(Vi)=1.2∶1.3, together with the dose of Pt catalyst, Pt inhibitor, and 10% of silica and titanium dioxide, the high temperature silicone rubber coating was successively prepared with 160 ℃ sustained 10-15 min, and the high temperature and mechanical properties were also studied. the results showed that when content of HPSR Si—H was 5 mmol/g, MD∶MR=10%, high resistance, flexibility and mechanical properties of the coating were the best.
  • Preparation of Fe-citric acid modified cotton fiber complex and their catalytic effect for dye degradation
    CUI Guixin, DONG Yongchun, WANG Peng, LI Bing, LI Fu
    功能材料. 2016, 47(9): 9197-9201. https://doi.org/10.3969/j.issn.1001-9731.2016.09.038
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    Cotton woven fabric was firstly modified with citric acid by a conventional pad-dry-cure process, and then coordinated with Fe3+ ions to prepare a Fe-citric acid modified cotton fiber complex. After the characterizing by SEM, FT-IR, DRS and TGA, catalytic performance of the complex was evaluated as a heterogeneous Fenton catalyst for the degradation of azo dye in water. The results indicated that Fe3+ ion initial concentration and temperature enhanced the coordination of citric acid modified cotton fiber and Fe3+ ions and significantly increased the Fe ion content of the resulting complex. Dye degradation was significantly accelerated by the presence of the complex as a heterogeneous Fenton catalyst in the dark. The catalytic performance of the complex was improved under light irradiation. Additionally, it catalytic activity was further promoted by increasing the Fe content or introduction of Cu2+ ions.
  • Preparation of porous materials by amphiphilic block copolymer polystyrene-block-poly(vinyl pyrrolidone) self-assembly
    LI Ying, HAN Han,YUAN Jinfang
    功能材料. 2016, 47(9): 9202-9206. https://doi.org/10.3969/j.issn.1001-9731.2016.09.039
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    A series of diblock copolymers,polystyrene-block-poly(vinyl pyrrolidone)(PSt-b-PVP),with different hydrophilic/hydrophobic ratios were synthesized by reversible addition fragmentation chain transfer(RAFT) polymerization.The structures and properties of the diblock copolymers were characterized by FT IR, 1H NMR and GPC. Different additives and a series of PSt-b-PVP with different hydrophilic/hydrophobic ratios dissolved in selective solvents.After solvent evaporation,the transparent film was obtained by rising with water. FESEM was used to study the morphology and size of the polymer porous material.The influence of additives, solvent evaporation temperature, the solvents and the hydrophilic/hydrophobic ratios on pore size were also studied. The results show that if the structure that we uses contains —OH functional groups or the monomer itself is used as additive,the porous polymer formed would have smaller holes.Meanwhile, reducing the heat is benefit to reduce the size of porous. And if we can use the structure which hydrophilic/hydrophobic ratios is PSt101-b-PVP79, it would be more easier to form smaller porous.Besides,using volatile solvent can be good for the forming of porous.
  • Properties of functionalized multiwalled carbon nanotubes with ultra-highercontent of carboxylic groups prepared by modified hummers
    LIANG Shaolei, SHI Le, LI Guangfen, TIAN Run, GENG Hongzhang
    功能材料. 2016, 47(9): 9207-9210. https://doi.org/10.3969/j.issn.1001-9731.2016.09.040
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    Here, carboxylation multiwalled carbon nanotubes (MWCNTs-COOH) were synthesized via a novel mild oxidation approach assisted by ultrasonication. A mild oxidation system with three oxidation agents as concentrated sulphuric acid, potassium permanganate, and hydrogen peroxide were chosen. In comparing to nonultrasonic process, the effect of ultrasound-assisted process on the carboxyl content of MWCNTs-COOH was discussed. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirmed that oxygen-containing functional groups such as —COOH, —OH, —CO were successfully attached on the surface of nanotubes. The results verified that the ultrasound-assisted oxidation process are much more effective than that without using ultrasonication, a higher oxygen content as 20.98at% in resulted MWCNTs-COOH were estimated, which exceeds the content of as-received carboxylated MWCNTs. A better dispersion of MWCNTs-COOH in ethanol was expected. Finally, field-emission scanning electron microscope (FESEM) images revealed that the length of MWCNTs-COOH was not shortened during the mild oxidation approach and the agglomeration was significantly reduced in the ultrasound-assisted oxidation process.
  • Influence of sintering temperature on properties of M2052 alloy prepared by powder metallurgy
    WANG Zhubo, LU Fengshuang, WU Bin,XU Ran, ZHANG Jianfu,
    功能材料. 2016, 47(9): 9211-9215. https://doi.org/10.3969/j.issn.1001-9731.2016.09.041
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    M2052 damping alloy was prepared through reaction sintered method using high-purity simple substance powders of Mn、Cu、Ni、Fe. Not only the effect of different sintering temperature on the density, porosity and mechanical properties of the sintering alloy was studied, but also the phase composition of the sintered sample was analyzed. It is demonstrated that the M2052 alloy sintered at 1 223 K was essentially γ-MnCu solid solution. The density of M2052 alloy sintered at 1 223 K was 6.23 g/cm-3, the relative density was 87.2% and the bending strength reach to 487 MPa. The results show that the damping capacity maintained at a very high level (tanδ ranges from 0.11-0.12) and the damping ability changes little as frequency increases from 0-100 Hz.
  • Synthesis of epoxy modifiedpolyurethane emulsion for water based inks
    ZHU Keke, ZHANG Xudong, WANG Yue
    功能材料. 2016, 47(9): 9216-9219. https://doi.org/10.3969/j.issn.1001-9731.2016.09.042
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    Epoxy modified polyurethane composite emulsion (PUE) was prepared using epoxy resin (CYD-011) as modified resin, toluene diisocyanate (TDI), polyether glycol (GE-210) as main materials by the way of acetone. Gravure water based inks was prepared with modified resin as binder and carbon black as pigment. The effect of such factors as the initial R (NCO/OH), the type and content of epoxy resin on the performance of emulsion and film were discussed. Additionally the amounts of epoxy resin on the property of the water based inks were researched as well. The emulsions were characterized by FT-IR and DSC. The results showed that epoxy resin and polyurethane have occurred graft reaction to achieve the purpose of the modification. It was found that PUE has excellent comprehensive performance with the initial R (NCO/OH) was 7.5, the content of epoxy resin CYD-011was 6%. The Water based inks has ideal gloss and rub resistance, while water resistance, alkali resistance could reached grade 5 and met the requirements of practical application.
  • Adsorption and recognition performance of amino modified D301 resin for AuCl4-
    AN Fuqiang, YUE Xiaoxia,GUO Xudong, WANG Heyang, LI Min,
    功能材料. 2016, 47(9): 9220-9225. https://doi.org/10.3969/j.issn.1001-9731.2016.09.043
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    The amino modified D301 resin, D301-g-APGMA, was obtained using D301 resin as the carrier, polyglycidyl methacrylate as functional polymer and ethylenediamine as modifier. D301-g-APGMA were characterized by FT-IR and XPS methods. Its adsorption performance and recognition selectivity performance for AuCl4- were also investigated. The results showed that D301-g-APGMA exhibited excellent adsorption properties and recognition selectivity for AuCl4-. The static adsorption capacity can reach to 276.74 mg/g at 25 ℃ and pH of 2. The relative selectivity coefficients relative to Cu2+ and Fe3+ are 713 and 374, respectively. Additional, D301-g-APGMA possesses excellent reproducibility and reusability.
  • Synthesis and performance of waterborne polyurethane-polyacrylate containing sulfonated soft segment
    XING Bo,WANG Tingping, LAI Xiaojuan
    功能材料. 2016, 47(9): 9226-9230. https://doi.org/10.3969/j.issn.1001-9731.2016.09.044
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    Waterborne polyurethane containing sulfonated soft segment (SWPU) was prepared with isophorone diisocyanate (IPDI) and sulfonated polyester-diol (SPOL) as main raw materials, then the sulfonated waterborne polyurethane-polyacrylate (SWPUA) composite emulsion was obtained by copolymerization with mixture monomers methylmethacrylate (MMA) and butylacrylate (BA). The synthesis process of SWPUA was simple and easy to control without any organic solvent and amine-free. The micellar conformation and diameter of the composite emulsion were characterized by transmission electron microscopic (TEM) and diameter analyzer. The crystallinity, thermal stability, mechanical properties and water resistance of films were investigated by X-ray diffraction analysis (XRD), thermogravimetric analysis (TGA) and tension test. The results showed that core-shell structure had formed between polyurethane and polyacrylate, degree of crystallinity of the films was 3.76%. After modified by polyacrylate, the thermal stability of SWPUA increased by 22 ℃. When the SPOL content was 40%, NCO/OH molar ratio (R) was 1.7, SWPUA with 50% solid content was obtained, the emulsion of SWPUA showed good appearance, and the average particle size and storage stability were44 nm and 12 months.
  • Preparation and adsorptive behavior to iodine of Cu-Mg-Al layer supramolecular materials
    ZHENG Jie, ZHU Xiaping, LI Ping, BAI Dekui, LI Ming
    功能材料. 2016, 47(9): 9231-9236. https://doi.org/10.3969/j.issn.1001-9731.2016.09.045
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    The Cu-Mg-Al layer supramolecular materials(Cu-Mg-Al LDHs) was successfully prepared by coprecipitation method, characterized by XRD and DTA-TG-DTG, and used as the adsorption materials to iodine. The Cu-Mg-Al LDHs was layered hydroxides with memory effect. The iodine could intercalate the interlayer of Cu-Mg-Al LDHs and the Cu on the laminate could adsorb iodine specifically. The saturated adsorption capacity of Cu-Mg-Al LDHs to iodine was 279.15 mg/g, it was much higher than that of ordinary Mg/Al layered double hydroxide (66.61 mg/g). The materials might be used as the adsorption materials to radioactive iodine.
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