30 June 2012, Volume 43 Issue 12
    

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    研究与开发
  • Synthesis of pH Probe based on the N-(cyclohexylcarbamoyl)indolizine Derivative
    HAN Qiaorong;LIU Lei;JIANG Yuliang
    . 2012, 43(12): 1513-1515.
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    The compound 4 based on N-(cyclohexylcarbamoyl)indolizine derivative was synthesised. The solvent effects on its UV and fluorscence spectra were studied, the results showed that this compound exhibited obviously UV absorption and strong fluorescence in ethanol. The pH effect show that when pH =10.02~12.48, compound 4 exhibited strong fluorescence, and the relationship between the fluorescence intensity and pH data is linear. This compound is promising to be the pH probe for the base environment of pH =10.02~12.48.
  • Nonisothermal Crystallisation Kinetics of Nano-silver Modified Polypropylene
    WANG Bisi;DING Changkun;ZHAO Yu
    . 2012, 43(12): 1516-1518.
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    Abstract: Polypropylene antibacterial chips containing 0.5wt% nano-silver were prepared by blending and granulation. The nonisothermal crystallization behavior and crystallization kinetics of polypropylene and nano-silver modified polypropylene were investigated by differential scanning calorimetry. The results showed that the nucleation free energy of polypropylene was decreased with the addition of nano-silver during the nonisothermal crystallization process. The Avrami equation could describe nonisothermal crystallization of polypropylene and nano-silver modified polypropylene very well. Their nucleation mechanism and geometry of crystal growth remained almost unchanged with the addition of nano-silver. The Avrami exponent n of polypropylene and nano-silver modified polypropylene were around 4.01 and 4.28 respectively, indicating that their spherulites all developed in three-dimentional field.
  • Preparation of Bio-filler from Mussel Shell by Means of Mechanochemistry and its Surface Property Characterization
    LI Haiyan;ZHANG Haiyan;PAN Li
    . 2012, 43(12): 1519-1523.
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    Waste mussel shell stacking with a significant odor and toxicity which are hazardous to human constitutes a serious environmental hazard. For utilization of waste mussel shell resource, granule of mussel shell (HBZZC) was prepared from waste mussel shell by removing cuticle, separating prismatic layer and the left nacreous layer was grinded by the means of mechanochemistry. The characterization results of HBZZC show that the mainly composition of HBZZC is aragonite (CaCO3) platelets and the particle size distribution range of HBZZC powder is from 40 nm to 1000 nm, the proportion of organic components of HBZZC is about 4.34 % and with a good thermal stability. Calcium, carbon, oxygen and nitrogen contents on the surface of HBZZC determined by XPS is 8.71 %, 45.17 %, 43.79 %, 2.33 % respectively, while the actual contents of carbon, oxygen and nitrogen of the organic matter within the HBZZC powder is approximately 64.59 %, 31.28 %, 4.13 % separately. Both of hydrophilic property and lipophilic property of HBZZC powder is significantly. N-heptane spreads out on the HBZZC powder and the water contact angle is about 24.5°. Using mussel shell for producing bio-filler for practical application as fillers for reinforcing polymers and waterborne coatings is expected.
  • Investigation on Tensile Strength of Steel Tube Covered with NiCrBSi Spray Weld Coating
    WANG Jian;WANG Puyu;JIANG Zishi
    . 2012, 43(12): 1524-1527.
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    NiCrBSi alloy coatings were produced on refractory steel tube substrate by oxyacetylene flame spray welding. OM, SEM, EDS, TEM were used to character the coatings in terms of macrostructure, distribution of element phase structure. The tensile strength of the coatings was measured by tensile testing and the extending deformation was observed. Results made it clear that the coatings were composed of γ-Ni solid solution, dispersion distributing Cr-riched second phase and borosilicate glass phase. Abundance dislocations winding around second phase particles. The coatings and the substrate formed metallurgy bonding, so the tensile strength got 522 MPa. Ductility cracks were found in steel tube substrate and quasi-brittle fractures were observed in alloy coatings. Refractory steel tube with Ni based alloy coatings presented high intensity and nice toughness properties at the same time, then whole capabilities were improved greatly.
  • Preparation and Thermal Conduction Performance of Sr0.4Ba0.6TiO3 Materials
    FENG Xianyang;WANG Peiji;LI Ping
    . 2012, 43(12): 1528-1531.
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    The effect of lanthanum doped on thermal conduction and thermal performance of Sr0.4Ba0.6TiO3 materials are studied in this paper. The thermal conductivities of barium strontium titanate (SBTi) materials were obtained at different lanthanum doped. The density of SBTi increased with the increasing of pressures, sintering temperature and lanthanum doped. It was shown that the lanthanum doped of small quantity (less 2.0%mol) resulted in increasing of thermal conductivities, the lanthanum doped of greater quantity (greater 2.0%mol) resulted in decreasing of thermal conductivities. The electron thermal conductivity of SBTi is a constant with sintering temperature increasing, and the phonon thermal conductivity increased with sintering temperature increasing.
  • Activating treatment of titanium surface and the corresponding cell response
    HU Pan;ZHOU Mingbing;HUANG Di
    . 2012, 43(12): 1532-1536.
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    Abstract: Titanium surface was treated by means of different solutions (1wt% hydrofluoric acid (HF) solution, 30wt% hydrogen peroxide (H2O2) solution and HF/H2O2 mixed solution with ratios of 1:5, 5:1 and 1:5), and then obtained activated surface with different topologies. The structure, roughness, hydrophilicity and chemical properties on the surface of the samples were characterized and analyzed using Scanning Electronic Microscopy (SEM), Atomic Force Microscopy (AFM), Contact Angle Meter and X-ray Photoelectron Spectroscopy (XPS). In addition, we also investigated how the treated titanium surface affects the morphology, proliferation and differentiation of osteosarcoma cells (MG63) by in vitro cell culture. The results showed that the titanium surfaces treated by HF and H2O2 mixed solution are rougher and have more F- and OH- group than the others, indicating that these surfaces are more fit for the cell’s adhesion, spreading, growth and proliferation. In which, the titanium surface treated by HF and H2O2 mixture with 1:5 ratio presents the most excellent cell biocompatibility at the immediate time of cell culture. So, maybe the treating method in the study is effective to promote the rapid integration between titanium and its surrounding bone tissues.
  • Preparation and Magnetic Properties of TiO2 Films on Iron-based Nanocrystalline Ribbons
    HU Qin;ZHU Zhenghou;YIN Lei
    . 2012, 43(12): 1537-1539.
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    Iron-based nanocrystalline ribbons surface was coated with thin films of TiO2 by so1-gel method and its influence to magnetic properies are studied.The results show that a layer of the TiO2 can be formed on the surface of the ribbons by so1-gel method. After coating, the surface of ribbons become smooth, but effective magnetic permeability decreased when quality factors increased, the soft magnetic properties decreased. The thin films got at 2 times of dip-coating create minimum effect to magnetic properties of ribbons.
  • Study on Hydration Characteristics of Carbonated Steel Slag and Slag as Portland Cement Admixtures
    LIANG Xiaojie;YE Zhengmao;CHANG Jun
    . 2012, 43(12): 1540-1544.
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    The effect of carbonated steel slag on hydration characteristics of cementitious system was studied by the determination of silicate phase content changes and hydration heat evolution of before and after carbonation products of steel slag, mortar strength, type of hydration products as well as micromorphology of mortar. The results show that carbonation reduces the silicate phase content of steel slag from 47.06% to 14.38%; Carbonation promots the early hydration of steel slag, but inhibits its further hydration; At the same of ratio, 3, 28d compressive strength of carbonated steel slag and slag cement are higher than that of uncarbonated steel slag and salg cement; CaCO3 generated by carbonation promotes the hydration of clinker; Carbonated steel slag promotes the generation of AFt in cementitious system ,and generates calcium carboaluminate hydrate.
  • Effect of purple light on ferroelectricity and electric transport process of polycrystalline Mn-doped BiFeO3 film
    DU Minghui;JIANG Qinghua;PENG Zengwei
    . 2012, 43(12): 1545-1547.
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    5% Mn-dpoed BiFeO3(BFMO) film had been deposited on Pt(111)/Ti/ SiO2/Si(001) substrate by Sol-Gol method，and a capacitor with a structure of Pt/ /BFMO/Pt was constructed. Effect of purple light on ferroelectric and J-V properties were surveyed. Conductance of BFMO film increases when illuminated with purple light, which is accounted for the existence of photo-induced carries due to illumination. The leakage current density alters from 9.1mA/cm2 to16.3mA/cm2 at 5V. Analysis of dark current density suggests that Ohmic conduction behavior is the dominated leakage mechanism and illumination do not change the conductive mechanism. Additionally, Hysteresis loop changed under illumination of purple light, and illumination enhances the remanent polarization of BFMO film, from 91.7μC/cm2 in dark to 99.9μC/cm2 in light.
  • Synthesis and Application of Polystyrene Porous Film with Honeycomb Pattern
    SHEN Yanming;LIU Dongbin;LI Shifeng
    . 2012, 43(12): 1548-1552.
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    The porous films with well-ordered honeycomb structure were prepared by breath figures method using linear polystyrene (PS) without polar groups. The casting solutions were prepared by solving PS with organic solvents such as chloroform, benzene and dichloromethane. The prepared films were characterized by SEM. Some effects including solution concentration, environment humidity, air flow rate and solvent type were investigated. It was found that the porous films with well-ordered honeycomb structure can be prepared using chloroform as the solvent owing to its suitable volatility, while could not be prepared using benzene and dichloromethane as solvents because of their higher or lower volatility. When the concentration of PS was in the range from 20 to 80 mg/ml, the condensed water on the solution surface could be effectively wrapped and fixed by PS, as a result well –ordered honeycomb pattern can be formed. The blowing air humidity should be higher than that of environment, and the pore size increased with the increase in the blowing air humidity. Well-ordered honeycomb structure porous films can be formed under the air flow rates ranging from 400 to 1000 ml/min, and the pore size increased slightly with the air flow rate. The resulted films can be used to fix enzyme such as HRP, which has promising use in catalysis.
  • Influence of RF sputtering parameter on the structural and electrical properties of AZO thin film
    HUANG Wen;YU Zhou;LIU Lian
    . 2012, 43(12): 1553-1555.
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    Aluminum doped zinc oxide (AZO) ?lms have been deposited by RF (radio frequency) magnetron sputtering technique. Effect of sputtering parameters (substrate temperature and argon gas pressure) on the structural、surface topography and electrical properties of the deposited films have been studied. Crystalline structure of the deposited films changed significantly with increasing substrate temperature，while argon gas pressure prominently effected the (103) to (002) diffraction intensity ratio. Temperature influenced surface topography seriously, while argon gas pressure did not. As substrate temperature was increased, thin film resistivities decreased sharply and carrier concentration and hall mobility increased prominently. Film resistivities decreased with increasing argon gas pressure, and then increased.
  • Preparation and electrochemical properties of activated mesophase pitch-based foam carbons
    JING Lei;ZHAO Donglin;LIU Hui
    . 2012, 43(12): 1556-1560.
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    Activated mesophase pitch-based foam carbons (AMPFCs) were prepared by foaming method and KOH activation with mesophase pitch as a precursor, and used as electrode materials for supercapacitor. Microstructure and morphology of AMPFCs were investigated by scanning electron microscope, X-ray diffraction and nitrogen adsorption isotherms at 77 K. The results show that AMPFC has high specific surface area of 2700 m2 g-1 and high total pore volume value of 1.487 cm3 g-1. The electrochemical properties of AMPFCs as electrode materials for supercapacitor were investigated by galvanostatic charge/discharge, cyclic voltammetry and electrochemical impedance spectroscopy. The specific capacitance of the AMPFC electrode could be as high as 240.48 F g-1 under a specific current of 0.02 A g-1 by constant current charge/discharge technique, and the energy density of the AMPFC electrode was 33.4 Wh Kg-1; The specific capacitance of the AMPFC electrode was 166.68 F g-1 under a specific current of 5 A g-1, indicating that AMPFC as electrode material for supercapacitor presents good electrochemical characteristics.
  • Impact of polycarboxylate dispersant with super-length of side chains on early hydration of cement
    QIAO Min;YU Yinhui;RAN Qianping
    . 2012, 43(12): 1561-1563.
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    A serial of polycarboxylate dispersants with super-length of side chains are used as the dispersant for cement. The impact of the dispersant on the early hydration of cement is investigated in system using Isothermal calorimetry measurements, compressive strength and scanning electron micron-scope. The polycarboxylate dispersants with super-length of side chains accelerate the early hydration of cement more than the common polycarboxylate dispersants and evidently enhance the strength of cement-based material. The morphology tells that the addition of polycarboxylate dispersants with super-length of side chains changes the morphology of the hydrated production. As increasing the length of super side chains, the floc-like C–S–H and needle like type of ettringite crystals increased.
  • Graft Polymerization of Methacrylic Acid on Crosslinked Polyvinyl Alcohol Microspheres and Adsorption Property of Grafted Microspheres towards N-Containing Metabolite and Drug Molecules
    ZHANG Zhengguo;GAO Baojiao;LEI Qingjuan
    . 2012, 43(12): 1564-1567.
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    Crosslinked polyvinyl alcohol (CPVA) microspheres are a class of polymer microspheres with biocompatibility. A redox initiation system was constructed with a great deal of hydroxyl group on CPVA microspheres and cerium ammonium sulfate, and the surface-initiated graft polymerization of methacrylic acid (MAA) on CPVA microspheres was performed with a redox initiation system of cerium salt-hydroxy, resulting in the grafted microspheres CPVA-g-PMAA. The chemical structure and physicochemistry characters of CPVA-g-PMAA microspheres were adequately characterized with infrared spectrum (FTIR), scanning electron microscope (SEM) and determining zeta potential. The adsorption behavior of the grafted microspheres CPVA-g-PMAA for creatinine (Cr) as a metabolite molecule and 5-fluorouracil (5-FU) as a drug molecule were mainly investigated and the adsorption mechanism was explored. The experimental results show that in a wider range of pH, the zeta potential of the microspheres CPVA-g-PMAA is a negative value with a larger absolute value. By the driving of strong electrostatic interaction, the grafted microspheres CPVA-g-PMAA display very strong adsorption ability for Cr and 5-FU.
  • Studies on Preparation and Properties of the Rare Earth Complex {[Tb(L)2(H2O)2](Hdmpy)(H2O)2}∞/ Polyurethane Acrylate Rare Earth Polymer
    SUN Guanghui;GUO Liangqi;LU Min
    . 2012, 43(12): 1569-1573.
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    A two-dimensional (2-D) TbIII coordination complex {[Tb(L)2(H2O)2](Hdmpy)(H2O)2}∞ (L = anthracene-9,10-dicarboxylate and Hdmpy = protoned 2,6-dimethylpyridine) was synthesized with the reaction of Tb(NO3)3 and anthracene-9,10-dicarboxylic acid ligand in the presence of 2,6-dimethylpyridine (dmpy). The composite material of {[Tb(L)2(H2O)2](Hdmpy)(H2O)2}∞- PUA were prepared by using {[Tb(L)2(H2O)2](Hdmpy)(H2O)2}∞ and macromonomers of polyurethane acrylate (PUA) through in situ polymerization. The dispersion of the rare-earth complex in composite material was characterized by AFM, and the thermal stability and luminescence properties were further investigated. The results reveal that the rare earth complex is dispersed in composite material at about 200-500 nm and the resulting material possesses thermal stability (over 300℃) and the strongest fluorescence emission peak of the rare earth polymer appears at 440 nm when the excitation wavelength is 372 nm. This material can be applied for the fields of luminescent material.
  • Preparation and Characterization of superhydrophobic surface on Al-Mg-Si alloy with different adhesive forces
    LI Jie;ZHANG Huichen
    . 2012, 43(12): 1574-1578.
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    Rough structure of Al-Mg-Si alloy substrates were acquired by immersing in solution base on discocation etching. Self-assembled monolayers of perfluorodecyltrichlorosilane was prepared on rough surface by self-assembled method. The characterization of surface properties of specimens was conducted with X-ray diffractometer, Scanning electron microscope and surface profiler; Contact angle measurement was used to analyse the surface wettability. The results indicate that the wettability of substrate convert from hydrophilicity to superhydrophilicity and superhydrophobicity after solution immersing and self-assembled monolayers preparation. Different rough structure of Al-Mg-Si alloy substrates were acquired by changing immersing time; Superhydrophobic surface with different adhesive force were prepared by changing the solution immersing time. The analysis indicate that rough structure of specimens by solution immersing and low surface energy material FDTS self-assembled monolayers are the main factors to cause superhydrophobicity. The analysis indicate that the different adhesive forces are caused by the different state of water droplets on the superhydrophobic surface with different surface roughness.
  • Study on acrylic acid bentonite of high amount/poly(sodium acrylate) superabsorbent compositeⅠ:the preparation process and morphology
    FU Lihua;PENG Yingzhi;WEI Tengyou
    . 2012, 43(12): 1579-1582.
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    Superabsorbent composite of high amount of acrylic acid bentonite/poly(sodium acrylic) was synthesized through solution polymerization with acrylic acid bentonite(ABT) and sodium acrylic and acrylic acid. The morphology of the composite was observed by scanning electron microscope(SEM). The results showed that acrylic acid bentonite is evenly and disorder dispersed in the composite with the sheets of 20~30 nm thickness. The preparation process were optimized. The results are as follows. The amount of ABT, crosslinker and initiator are 30 wt%, 0.3 wt%, 1.1 wt% of the monomer mass respectively. The total water in the system is 340 % of the monomer mass, the neutralization degree is 64 %).The absorbency of the composite is 1103 g/g in deionized water in the conditions. At the same time, the water retention property of the superabsorbent composite(PAA) was better compared to that of PAA.
  • Synthesis and characterization of nanosheet-like poly(p-phenylenediamine)
    LI Xiting;YUAN Chengqian;ZHAO Yuhua
    . 2012, 43(12): 1583-1585.
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    Poly(p-phenylenediamine) (PpPD) nanosheets were synthesized by solution polymerization with HCl as the dopant acid and ammonium peroxydisulfate (APS) as oxidant. The macromolecular structure, crystallinity, thermal stability and morphology of the as-prepared product were characterized by Fourier transform infrared spectroscopy (FT-IR)、X-ray diffraction (XRD)、thermogravimetric analysis/differential scanning calorimetry (TGA/DSC) and scanning electron microscopy (SEM). The results reveal that the product is partly crystal and exhibits good thermal stability. The possible formation mechanism of PpPD nanosheets was also discussed.
  • Structural and optical properties of Ni2+-doped ZnO thin films and powder
    XU Songning;CAI Zongqi;SUN Naikun
    . 2012, 43(12): 1586-1589.
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    Abstract:　Ni2+-doped ZnO (0.8 at%) thin films that show the single-phase wurtzite (hexagonal) structure were grown on single-crystalline silicon (100) substrates by means of pulsed laser deposition using an XeCl excimer laser under vacuum and a 5 Pa oxygen atmosphere. Under the oxygen atmosphere, thin film grows along the direction of (002) and has a smooth surface; the average particle size of thin film is 80 nm. The thin films prepared under vacuum atmosphere appear impurity phase that is Zn2SiO4, and the average particle size of thin film is 150 nm. Compared with the thin film prepared under vacuum atmosphere, the thin film prepared under the oxygen atmosphere has more obvious intrinsic emission peak and shows the blue-violet emission located at 425 nm which is ascribed to an electronic transition between the donor level of interstitial Zn and the valence band. And it shows a strong blue emission peak at 482 nm, which is attributed to the transition between the vacancy of oxygen and interstitial oxygen. Meanwhile the intensity of the blue emission peak at 449 nm from oxygen defects greatly reduces.
  • Fabrication and optical properties of deuterated polystyrene colloidal crystals
    YAN Hongwei;ZHANG Lin;LV Haibing
    . 2012, 43(12): 1590-1593.
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    Highly monodisperse deuterated polystyrene colloidal spheres were synthesized in water medium. High-quality deuterated polystyrene colloidal crystals were fabricated by vertical deposition method. It was clearly shown that deuterated styrene monomers had generated a polymerization reaction through Fourier transform infrared spectroscopy. Highly ordered arrangement of colloidal microspheres was confirmed by scanning electron microscopy, and it was considered to be face-centered cubic structure by cross-sectional image analysis. The transmission spectra of deuterated polystyrene colloidal crystals exhibited some characterization of high-order Bragg diffraction, which further confirmed the face-centered cubic close-packed structure of deuterated polystyrene colloidal crystals as compared to the calculated band structure. Angle resolved transmission spectra showed the diffraction peak of (111) plane was blueshifted, while the diffraction peaks of (200) and (220) planes were both redshifted as increasing the incident angles.
  • Characterization and Technology Research on Preparation of Platinum/Graphene
    CHEN Kuan;TIAN Jianhua;LIN Na
    . 2012, 43(12): 1594-1597.
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    Graphite oxide was prepared from natural flake graphite by chemical oxidation method and subsequently low temperature thermal expansion was applied to produce the expanded graphite(EG). After that, we employed the microwave-heating method to reduce the expanded graphite and PtClO62- to platinum/graphene(Pt/Gr) composite in ethylene glycol system. Influences on the structure and catalytic property of Pt/Gr were analyzed systematically, such as pH value, the time of the microwave radiation and the proportion of water in ethylene glycol. We assessed the electrochemical property of Pt/Gr on the grounds of chronoamperometry(CV) test. Transmission electron microscopy(TEM) and Scanning electron microscope(SEM) characterizations confirm the surface structure of graphene and Pt/Gr. The result revealed that we can obtain Pt/Gr nanocomposite with high platinum loading and dispersivity under an optimum condition. The TEM image showed us that when the platinum loading is 40wt%, the particle size distribution of platinum was in the range of 3.0nm to3.3nm, it has a high catalytic activity to hydrogen and oxygen electrode reaction, that mean it can be used as electrocatalyst in PEMFC.
  • Synthesis and Properties in Hydrolytic Cellulose of Carbon-based Solid Acids Prepared From Different Carbon Sources
    SHEN Shuguang;WANG Tao;QIN Haifeng
    . 2012, 43(12): 1598-1601.
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    Abstract: Three kinds of carbon-based solid acid were prepared from carbon nanotubes (CNTs), glucose and phenolic residue, respectively. The structural information of these solid acids was investigated by XRD, FT-IR and 13C NMR. The carbon-based solid acids were used to hydrolyze pretreatment microcrystal cellulose as catalyst, in which the yield of reducing sugar was used to evaluate the hydrolysis efficiency of catalysts. The results indicated that compared with the traditional carbon-based solid acid from glucose, the phenolic residual-based solid acid also contains aliphatic side chains except phenolic-OH, COOH and SO3H. This structure is beneficial to catalytic activity of carbon-based solid acid and improves its hydrolytic efficiency. Although CNTs has the pyknotic carbon structure and low density of SO3H, its high specific area shows high hydrolytic efficiency in heterogeneous catalytic reaction of hydrolytic cellulose.
  • Improvement of the Electrochemical Properties of Triphosphazene-sulfur composite as cathode materials for Lithium-sulfur Batteries
    YUE Xin.LIU Hui;LIU Jingdong
    . 2012, 43(12): 1602-1604.
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    Mixture of triphosphazene-sulfur composite (TPS) and mesoporous carbon was prepared by heat treatment with the aim to improve TPS’ electrochemical properties. Results of Scanning Electron Microscope test showed that the morphology of TPS’ surface was different from that of elemental sulfur; Data of Contact Angle Measurement was that the contact angle of water droplet with TPS’ surface was 35°, while that of elemental sulfur’s surface was 115; Results of XRD and IR tests proved that structural characteristic of TPS was the same as sulfur, with its surface decorated by phosphazene groups. When TPS mixed with mesoporous carbon, it showed improved electrochemical properties. At the constant current of 10mA/g, its initial discharge capacity was 767mAh/g, the second cycle of capacity retention rate was 84.8%, its discharge capacity remained at 303.8mAh/g after 30 cycles.
  • Fabrication of PZT nanotubes in through-hole PAA template using sol-gel spin coating method
    SONG Ye;JIANG Longfei;QI Weixing
    . 2012, 43(12): 1605-1609.
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    PZT nanotubes were synthesized in through-hole PAA templates by using a sol-gel method together with spin-coating technique. The effect of the sol concentration on the nanotube morphology was studied. The morphology and microstructure of PZT nanotubes were examined by SEM and TEM. Their crystal structure and chemical composition were determined by XRD and EDS. The results show that the as-prepared nanotubes are composed of tetragonal perovskite nanocrystallites and appear to have high toughness. The average diameter of the nanotubes is ~ 75nm, in agreement with that of nanochannels of original PAA templates. The tubule wall thickness is ~ 7nm. When the sol concentration was in the range of 0.1 to 0.4M, PZT nanotubes could be formed within the nanochannels of PAA templates. Moreover, the sizes of nanocrystallites within the walls of PZT nanotubes were increased with the increase of the sol concentrations.
  • Surface modification of PET with MCT-β-CD and investigation on digital heat transfer printing
    CHEN Li;ZHANG Guanfeng;WANG Chaoxia
    . 2012, 43(12): 1610-1612.
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    Surface modifications of PET fabrics were studied with MCT-β-CD for digital transfer printing. The modification degree and the wettability of the modified PET fabrics were investigated. The results showed that the increase of weight gain rate of 7.50% could be obtained when the deweighting rate was 35.63%. The decrease of wetting time to 44.97s illustrated that the wettability was improved after the modification. The K/S value of the digital transfer printed modified PET fabric was 9.56 and that of the untreated PET fabric was 7.81. The K/S value would be decreased with reduced transfer temperature or time. Yet the K/S increase rate could be improved. Surface modification with MCT-β-CD provided an effective way to enhance the color depth of the PET fabric digital transfer printing.
  • Influence of Resin Matrix on Tensile Shear Strength of Conductive Adhesive
    YIN Ruiming;WANG Liugong;YANG Huarong
    . 2012, 43(12): 1613-1617.
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    Electrical conductive adhesives were prepared based on epoxy resin with different functional groups and curing agent with different addition, structure and performance were characterized by FT-IR, SEM and other means. The results indicated that tensile shear strength declined with the increased in the number of epoxy functional groups, the largest tensile shear strength of resin matrix is 31MPa and the largest tensile shear strength of ICA is 9MPa when we chose bifunctional of the DER331. Tensile shear strength raised with the addition of curing agent, the tensile shear strength of resin matrix is 32MPa and the tensile shear strength of ICA is 10MPa when the mass ratio of epoxy resin and curing agent is 25:7. Tensile shear strength was inverse relationship with the curing shrinkage.
  • Preparation and Photocatalysis Propetry of TiO2 Nanotube
    TIAN Hui;WU Yucheng;LI Yun
    . 2012, 43(12): 1618-1621.
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    Using NH4F as aqueous solution, TiO2 nanotubes arrays were prepared on the surface of titanium sheet by the method of anodic oxidation. TiO2 nanotubes were characterized by FESEM and XRD. UV-1800 ultraviolet and visible spectrophotometer was employed to investigate the photocatalytic property of nanotube on Methyl Orange, which was used as the analogue pollutant. The result revealed that TiO2 nanotube was effective on the degradation of Methyl Orange under the condition that oxidation potential was 50 V, oxidation time was 10 h and calcination temperature was 500℃.
  • Research on Preparation of Wall Decorative Building Materials With Bagasse and Bamboo
    ZHU Lei;YANG Rendang;HAN Wenjia
    . 2012, 43(12): 1622-1626.
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    Environmental molding decorative building materials were prepared with bagasse and bamboo fibers via the hot forming process of fiber molding. The morphological characteristics of bagasse and bamboo fiber were analyzed. The effect of addition of the bamboo pulp on stiffness, tensile, burst and drainage were investigated. The results indicate that the average length of bagasse and bamboo fiber is 0.78mm and 1.22mm. They have very well complementary to each other in fiber form. The drainage rate of pulp in the forming process was faster with the increase of the addition of the bamboo pulp, and the stiffness，tensile index and burst index increase at first and then tend to decrease. When the addition of bamboo pulp was 70% (by mass), the stiffness, tensile index, and burst index increased 77.02%, 26.69%, 21.77%, which well improved the physical properties of molding decorative building material. The surface microstructure of the material was analyzed with SEM．
  • In-situ Synthesis and Characterization of Nanocrystalline Cellulose/Magnetic Nanospheres
    LIU Zhiming;XIE Cheng;WANG Haiying
    . 2012, 43(12): 1627-1631.
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    Nanocrystalline cellulose/magnetic nanospheres were in-situ synthesized with laboratory-made reed pulp nanocrystalline cellulose (NCC). With atomic force microscope (AFM), transmission electron microscope (TEM), environmental scanning electron microscope (ESEM), magnetic particle solid content, porosity of nanocrystalline cellulose magnetic nanospheres, fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD), the results show that the magnetic particles was nano-Fe3O4, which was fully dispersed in NCC through chemical bonding and physical adsorption with NCC to form nanocrystalline cellulose/magnetic nanospheres. Nanocrystalline cellulose/magnetic nanospheres were in-situ synthesized under better condition with NCC concentration of 1.0%, stirring speed of 500 r/min, total iron ion concentration of 0.0065 mol/L(the mass fraction of magnetic particle theory quality is 5% to NCC). Nanocrystalline cellulose/magnetic nanospheres with vacuum freeze-drying has the magnetic properties of magnetized strength of 73.39 emu/g (per gram ash) and coercivity of 20.1 Oe.
  • Novel method for synthesis of biphenyl triarylamines as hole-transport material
    JIA Zhenglei.WANG Shirong;LI Xianggao
    . 2012, 43(12): 1632-1636.
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    Triarylamines have emerged as one of the most promising hole transport materials and play an important role for application in organic light-emitting diodes and organic photo-conductors. The recent method for synthesis of triarylamines is using 4,4′-diiodo-biphenyl to react with secondary arylamine and catalyzed by CuCl, 1,10-phenanthroline. To reduce the costs, we investigated the reaction which used the 4,4′-dibromo-biphenyl and diphenylamine as raw material and was catalyzed by Pd(OAc)2, tri-tert-butylphosphine. The reaction conditions，such as raw materials ratio, reaction time, amount of catalyst, reaction temperature was investigated. The optimal reaction conditions were determined: the molar ratio of diphenylamine to 4,4′-dibromo-biphenyl was 2.5︰1, the amount of catalyst was 0.05mmol, refluxed at 145℃ for 6h and the yield was 78.89%. According to the optimum process above, we used 4,4′-dibromo-biphenyl to react with 3-methyldiphenylamine and 4-methyldiphenylamine, respectively, for synthesis of N,N′-bis(3-methylphenyl)-N,N′-diphenyl- benzidine(m-TPD) and N,N′-bis(4-methylphenyl)-N,N′-diphenyl-benzidine(p-TPD) and the yield was 75.59% and 69.96%, respectively. The novel method efficiently reduced the costs of process flow diagram（PFD） of hole-transport materials.
  • Corrosion inhibitor nano-particles for iron relics protection prepared by self-assembling
    HE Benqiao;LI Tingting;ZHANG Tongyang
    . 2012, 43(12): 1637-1639.
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    The corrosion protection plays a very important role in the protection of iron relics. A novel corrosion inhibitor nano-particle for iron relics was fabricated by consecutively layer-by-layer self-assembling of positive polyethylene imide (PEI), negative poly(sulfonated styrene) (PSS) and positive benzotriazole (BTA) on the surface of negatively charged SiO2 nanoparticles. Transmission electron microscopy, Zetasizer and X-ray photoelectron spectroscopy (XPS) were employed to characterize the inhibitor nano-particles. Results reveal that the size of particles increases with the increase in the number of coating layers. The surface charge appears corresponding changes. The XPS result shows that the chemical surrounding of nitrogen atoms in the inhibitor nano-particles is changed with the assembly process due to the electrostatic effect between layers. The content of BTA in the inhibitor nano-particle with mono-layer of BTA reached 35.4mg/g SiO2, which can be readily controlled by improving the number of the PSS and BTA layers.
  • The surface modification of the separator to improve the cyclic performance of lithium metal electrode
    JU Lan;LI Zhihu;JU Hua
    . 2012, 43(12): 1640-1642.
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    Abstract: in this article the plasma technique was used to graft the lithium sulfonic group (SO3Li) and methyl methalacrylate (MMA) group into the polypropylene (PP) separator surface. The symmetric Li/separator/Li cells were assembled to study the effect of these functional groups on the lithium metal electrode. based on the electrochemical impedance measurements and the charge-discharge tests it can be found that the introduction of the MMA and SO3Li functional groups into the electrolyte (separator)/electrode interface can effectively enhance the electrode reaction kinetics, decrease the interface resistance and suppress the formation of the dendrite during cycling.
  • Effects of Assistant Gases Composition on the Structure, Properties of Diamond-like Carbon Films
    DAI Haiyang;CHEN Zhenping;CHENG Xuerui
    . 2012, 43(12): 1643-1646.
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    Diamond-like carbon (DLC) films on glass wafers were produced by middle frequency pulsed unbalanced magnetron sputtering technique (MFPUMST) with methane-argon or acetylene-argon mixed gases as assistant gases. These films were characterized by Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), nanoindentation and atomic force microscopy (AFM). The chemical bonding of carbon characterized by Raman spectroscopy and XPS shows that the sp3 fraction in DLC films obtained with argon-methane mixed gases as assistant gases is higher than those produced by means of argon-acetylene as assistant gases. Nano-hardness for these films analyzed by a nano-indentation technique shows the nano-hardness in DLC films obtained with argon-methane mixed gases as assistant gases is higher than those produced by means of argon-acetylene as assistant gases. AFM tests indicate that RMS roughness of the film obtained with argon-methane mixed gases as assistant gases is lower than those produced by means of argon-acetylene as assistant gases. The results shown above indicate that the assistant gases composition has a strong influence on the bonding configuration, properties, surface morphology of the deposited DLC films.
  • SYNTHESIS OF PRECURSOR OF SiC CERAMIC CONTAINING BERYLLIUM
    DUAN Xidong;LI Wenfang;ZHOU Shan
    . 2012, 43(12): 1647-1650.
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    Beryllium acetylacetonate [Be(acac)2] was synthesized using beryllium hydroxide,sulfuric acid and acetylacetone as raw material. Beryllium acetylacetonate [Be(acac)2] reacted with polycarbosilane (PCS) with heating ,resionoid product was produced. In the reaction ,the beryllium acetylacetonate was consumed , the melting point was rised comparing to the onset polycarbosilane .The element analysis shows there are some beryllium in the product , the gel permeation chromatography GPC analysis shows the molecular of the product is rised comparing to the onset polycarbosilane. Fourier transform infrared spectroscopy (FT- IR) analysis shows there are such chemical structures in PBeCS : Si(CH3)2—CH2—,—Si(CH3)?(H)—CH2—.1H–NMR shows the Si-H bond in the reagent was consumed 。The reaction mechanism is inferred on the basis of analysis result , and the Si-H bond played a crucial role in the formation of the product . The experiment and theory analysis shows the product is a kind of polycarbosilane containing beryllium , which can be called polyberylliumocarbosilane (PBeCS). After treated under 1200℃ the product PBeCS can be converted into the silicon carbide containing Beryllium.
  • Preparation of the Epoxy/polyacrylate Complex Latex Ⅰ: Effect of the Acrylate Monomers and Their Polymerizing on Swelling Behaviour of the Epoxy Latex Particles
    CHENG Wen;ZHANG Haichao;WU Yan
    . 2012, 43(12): 1651-1653.
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    The epoxy/polyethylene glycol block copolymer used as emulsifier the aqueous epoxy emulsion was prepared by means of phase inversion technique. The effect of the amount of the emulsifier on the phase inversion point, and effect of the stirring speed on the mean diameters and distribution of particles were investigated. The results showed that the phase inversion points decreased with increasing amounts of the emulsifier, and the mean diameters sharply decreased with increasing the stirring speed. The effects of the amount of the acrylate monomers and their polymerizing reaction on the swelling of the epoxy latex particles were also studied. The results showed that the epoxy latex particles could be swelled by the monomers, and as the mass ratio of monomers with epoxy (Mm/MEP) was raised to 0.8 epoxy latex particles were bursted but the stability of the complex emulsion not decreased. After polymerizing the mean diameters of the epoxy latex particles further increased and the distribution of particles became into wider. When Mm/MEP was raised to 0.6 parts of the epoxy latex particles settled because of bigger latex particles swelled.
  • The preparation of pH-responsive hyaluoronic acid nanoparticles and the study on a nano-delivery vehicle for doxorubicin
    WU Jingliang;LIU Chenguang;HUANG Zhenhua
    . 2012, 43(12): 1654-1657.
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    Polymeric nanoparticles were constructed from hyaluronic acid (HA) and histone (His) as a tumor pH-responsitive anticancer drug carrier. As pH decreased from 7.4 to 5.5, the particle size increased from 230 to 780 nm, absolute zeta potential increased, and in vitro DOX release increased. DOX-loaded nanoparticles (＜300nm) showed higher cytotoxicity to MCF-7 cells. Cell uptake studies indicate that DOX uptake might be taken place by two ways: endocytosis mediated by HA receptor and uptake of DOX released from DOX-loaded nanoparticles. Consequently, the ?ndings indicated that His-HA nanoparticles were pH-responsive and show a promising application as a doxorubicin carrier.
  • Study on 0.5wt%ZnO addition BaCe0.8Zr0.1Y0.1O3-a film enhancement Lightning-Strike Protection equipment
    HUANG Yan-qin
    . 2012, 43(12): 1658-1661.
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    0.5wt%ZnO addition BaCe0.8Zr0.1Y0.1O3-a film was prepared on the Fe substrate via sol-gel route. The sintering temperature and sintering time characters were according the TGA and DTA of the materials. Phase composition and fracture morphology of the material were characterized by using XRD, SEM and TEM. The XRD results indicate that the ceramic is of a single orthorhombic phase of perovskitetype BaCe0.8Zr0.1Y0.1O3-a. The SEM shows that the surface of the film is uniformity, high density and not cranny. The interface of the film and substrate are well combinative from analyzing the section image. The micstructure reason of ZnO enhancement the connection of crystalline grain was shown by TEM. The conductivity of the material is measured in the dry and wet air, respectively. The conductivity is increased as the temperature rises and bigger in wet air. This method prepared BaCe0.8Zr0.1Y0.1O3-a film can be used to protect the Lines Lightning Protection and enhancement their property.
  • In situ construction, characterization and antibacterial properties research of nano-silver/chitosan composite hydrogels
    KONG Jie;LI Guoqiang;YE Jingyun
    . 2012, 43(12): 1662-1664.
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    Nano-silver particles were in situ formed by reducing silver nitrate with ascorbic acid in chitosan/1, 2-propylene glycol gel, and then nano-silver/chitosan composite physical hydrogels with different content of nano-silver were obtained by replacing 1,2-propanediol with alkaline solution. UV-visible spectra, XRD diffraction patterns and low resolution TEM images showed that nano-silver particles with a good dispersion were formed in the composite hydrogels. High resolution TEM images indicated that the nano-silver particles were between 20~50nm in diameter, but its crystalline state was not uniform. Antimicrobial experiments illustrated the antibacterial properties of the nano-silver/chitosan composite hydrogel to Escherichiacoli and Staphylococcus. aureus.
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