29 June 2014, Volume 45 Issue S1

    

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研究 开发
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  Binding and Recognizing Properties of Ionic Imprinted Polymer towards Sc(III)

  ;;;;Fu-Qiang AN ;;

  . 2014, 45(S1): 1-0.

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  Polyethyleneimine (PEI) is grafted onto the surface of silica gel particles, and functional grafting material PEI/SiO2 is prepared successfully. Then the ionic imprinted polyethyleneimine on the surface of silica gel is prepared using Sc3+ as template ions and ethylene glycol diglycidyl ether (EGDE) as crosslinking agent and ionic imprinted material IIP-PEI/SiO2 is obtained. The binding and recognizing properties of IIP-PEI/SiO2 for Sc3+ are researched using batch and methods. The experiment results show that the ionic imprinted material IIP-PEI/SiO2 possesses strong binding affinity and specific recognition selectivity property for Sc3+. The binding capacity could reach to 1.08mg?g-1, and binding isotherm data greatly obey the Freundlich model. The relative selectivity coefficient relative to Al3+ and Fe3+ is 4.21 and 5.73, respectively. The Sc3+ in simulative and actual acid dipping solution of red mud is recovered effectively. Besides, the IIP-PEI/SiO2 can be regenerated easily and IIP-PEI/SiO2 possesses better reusability.
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  Reinsertion Method to Produce Graphite Intercalation Compounds with Larger Expanded Volume

  Xue-Yan WU

  . 2014, 45(S1): 2-0.

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  Graphite intercalation compounds were prepared by using a double treatment method to increase the expanded volume. The expandable graphite (expanded volume 250ml/g) was prepared by chemical oxidation. Then the expandable graphite was used as the raw material. The expanded graphite, with expanded volume of 380ml/g, was prepared by using the reinsertion method. The influences of mixture ratio, reaction temperature and time on the expanded volume were also investigated. X-ray diffraction patterns provided evidence for the intercalation product remaining in the crystalline structure of natural graphite，but the graphite layer distance was widened . The SEM images indicate that the graphite layers opened further by the reinsertion. The results showed that the method was potentially feasible and applicable. This new method could potentially provide new insights into graphite-based nano-materials.
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  Preparation and characterization of polyethylene glycol/ethyl cellulose composite phase change thermal energy storage material

  LI Yan Shan ;;;

  . 2014, 45(S1): 3-0.

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  This paper deals with the preparation, characterization, and determination thermal energy storage properties of polyethylene glycol / ethyl cellulose (PEG / EC) composite as solid-solid composite phase change materials (PCMs). The composite PCMs were prepared by blending PEG and EC in the light of the organic phase separation method. And the maximum mass fraction of PEG in the composite is 84.6%. The composite PCMs were characterized by FTIR, SEM, DSC and TG analysis techniques to study the morphology, compatibility, structure and thermal properties of PEG / EC composites respectively. The results show that PEG / EC composite PCMs are irregular granules which have good compatibility not due to new chemical bond but hydrogen bond formed between PEG and EC molecules. PEG / EC composite is changed into network structure and PEG loses its mobility when temperature is higher than its melting point on account of hydrogen bond and winding among PEG and EC molecules, etc. So the composites turn into solid – solid PCMs, which have good thermal stability when phase change occurs under 80℃, and maximum enthalpy may reach 151.8 J / g.
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  Effect of quenching-tempering process on microstructure and mechanical properties of 30CrNi2MoV steel of frac-pump fluid end

  ;Lin-Yan CHEN ;;

  . 2014, 45(S1): 4-0.

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  Cracking failure of frac-pump fluid end easily occur in fracture operation in the oil fields. Influence ofdifferent heat treatment processes on microstructure and mechanical properties of frac-pump fluid end 30CrNi2MoV steel were investigated by means of scanning electron microscope, Rockwell hardness test, tensile test, impact test. The changing rules of plasticity, hardness, strength and impact toughness of 30CrNi2MoV steel at different heat treatment processes were analyzed. The results show that the impact energy, crack propagation energy will all increase as the temperature increase. The toughness of 30CrNi2MoV steel is mainly dependent on the crack propagation energy. The effect of Quenched-and-Tempered microstructure on impact crack initiation energy is less, but the effect of that on crack propagation energy is great. Alloy elements are fully dissolved under oil quenching at 880℃, when tempered at 620~650℃, dispersive tiny carbide stable and the uniform and tempered sorbite is obtained. The optimum hardness range of (37.2-40.5HRC), excellent combination of strength and toughness is also obtained, which can satisfy basic application of frac-pump fluid end steel.
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  Influence of amphoteric polycarboxylate-based superplasticizer with long side chain on early hydration of cement paste

  . 2014, 45(S1): 5-0.

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  The influence of cation content in main chain of amphoteric polycarboxylate-based superplasticizers (APCs) on the early hydration of cement is investigated. The result indicates that, compared with the traditional anion polycarboxylate, APCs with cation groups promotes the hydration of cement and the formation of hydration product, thereby increasing the early strength of cement paste. The calorimetry shows that cement with APC-10 (10% content of cationic groups) has an earlier acceleration period. Results from DSC and SEM confirm the trend that more hydration products, such as portlandite and clusters of C-S-H, are formed in sample with APC-10. However, when cationic content is increased to 15% and 20%, the hydration promotion effect of long side chain APCs is reduced or even disappeared resulting in a slight decrease of the early strength of cement paste.
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  Preparation and electromagnetism property of activated carbon loaded with Ni-Zn ferrite

  Yuliang An ;;

  . 2014, 45(S1): 6-0.

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  The Ni-Zn ferrite sol was synthesized with citric acid as complexing reagent, and the ferrite and activated carbon composite gel was obtained by vaporization treatment, then the activated carbon loaded with Ni-Zn ferrite composite was prepared by calcination treatment of the gel. The effect of process parameters such as the sintering temperature, sintering gas and ratio of carbon/ferrite on the morphology and structure of composite were studied in detail, in which the morphology, structure and compose of composite were characterized by Scanning Electron Microscopy (SEM) and Elements X-ray diffraction (XRD). Furthermore, the complex permittivity and permeability of the as-prepared composites were characterized in the frequency ranges of 8.2-12.4 GHz by the wave-guide method on the vector network analyzer, in which the higher electrical and magnetic loss tangent values of the activated carbon loaded with Ni-Zn ferrite composite were obtained.
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  Research progress in graphene/polymer conducting composites

  ;zhang dong

  . 2014, 45(S1): 7-0.

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  Graphene has recently attracted much interest in material field due to its unique two-dimensional structure and outstanding properties. It has great potential in terms of improving the electrical, thermal and mechanical properties of its polymer composites. In this paper, advances in preparation and application of graphene/polymer conducting composites were reviewed and further developments of graphene/polymer conducting composites were also proposed.
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  Magnetic properties and large magnetocaloric effects of amorphous and crystallized Gd-Co binary alloys

  . 2014, 45(S1): 8-0.

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  Gd59Co41 and Gd56Co44 amorphous ribbons were prepared by arc melt spinning, and then Gd56Co44 amorphous ribbon was crystallized at 588K for 10min. By means of X-ray diffraction (XRD) and physical property measurement system (PPMS), the structure, magnetic properties and magnetocaloric effect of the alloys were investigated. The results show that the onset crystallization temperatures Tx for the Gd59Co41 and Gd56Co44 amorphous ribbons were found to be about 523 and 544 K, respectively.The Ho4Co3-type hexagonal phase was obtained for crystallized Gd56Co44 ribbons after annealing. All the amorphous and crystallized alloys undergo ferromagnetic to paramagnetic second-order transition at their Curie temperatures. The Curie temperature (TC) of the amorphous Gd59Co41 and Gd56Co44 alloy enhances from 198 to 217 K with decreasing the Gd/Co ratio. And the TC of crystallized Gd56Co44 alloy was 218K, which has little change compared with that of the amorphous alloy. For a magnetic field change of 5T, the maximum magnetic entropy change (-ΔSM) and refrigerant capacity (RC) of Gd59Co41 and Gd56Co44 amorphous alloys are 7.7 J/kg K, 525 J/kg and 6.6J/kg K, 544J/kg, respectively. However, these values of crystallized Gd56Co44 alloy are 5.6 J/kg K and 528 J/kg. Large magnetic entropy change and magnetocaloric effect, negligible coercive force and thermal/magnetic hysteresis make Gd-Co binary amorphous and crystallized alloys as the potential candidates for the magnetic refrigeration materials working in the vicinity of 200 K.
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  Effect of rare earth Nd Doping on the Electronic Structure and Optical Properties of ZnO

  . 2014, 45(S1): 9-0.

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  This text was conducted to analytical investigation the Effect of Nd Doping on the Electronic Structure and Optical Properties of ZnO, The geometry structure of ZnO crystal was optimized about undoped and Nd-doping cases, were performed by using density functional theory(DFT) based on first-principles ultrasoft pseudoptential metheod, meanwhile band structures，density of states(DOS) 、partial density of states(PDOS) and optical properties have been calculated. The results show that after doping,the lattice constant increases,band gap widening ,Fermi level into the condution band , dielectric constant and absorption coefficient have great change. Nd is an effective donor doping elements of ZnO; Nd added to improve the electrical conductivity of ZnO system and improve the optical performance.
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  Effects of oxygen content on electrical property and stability of ITO films

  Ji-Wen XU

  . 2014, 45(S1): 10-0.

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  ITO films under different oxygen content were deposited by magnetron sputtering on glass substrates. The effects of oxygen content on the optical, electrical properties as well as stability of ITO films under high temperature, high temperature and high humidity, alkaline environments and time-dependent are studied. The results show that the increasing of oxygen content reduces the deposition rate. The oxygen content has a little influence on the visible transmittance, and causes the blue shift of peak transmittance. However, the oxygen content has a great impact on the electrical property and stability. When the oxygen content is less than 1vol.%, the electrical property firstly decrease and then increase, and the optimal resistivity is achieved at 0.4vol.% oxygen content. Furthermore, the electrical property has high stability in various environments. When the oxygen content exceeds 1vol.%, the electrical properties and its stability are deteriorated.
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  Synthesis and characterization of Eu-SSA-phen／MCM-41 hybrid luminescent materials

  . 2014, 45(S1): 11-0.

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  Abstract: Modified MCM-41 mesoporous molecular sieves were synthesized by hydrothermal method. Lanthanide complexes Eu-SSA-Phen was synthesized by liquid precipitation method, the best ratio of sulfosalicylic acid and o-phenanthroline these two ligands was found, Eu：SSA：phen=1:2:1. Finally, lanthanide luminescent complexes with the best glowing effect was assembled into modified MCM-41,and then synthesized lanthanide complexes (Eu) / modified MCM-41 hybrid materials which were then characterized by SAXRD, IR spectra, fluorescent spectroscopy, thermal gravimetric analysis, for study the structure and fluorescence properties. It showed that the hybrid materials had typical structure of MCM-41 and retained the same pore structure as MCM-41 after the assembly processing. The fluorescence spectra presented characteristic fluorescence-emission of Eu3+. Compared with lanthanide complexes, the higher emission intensity and better thermal stability was observed, which was good for practical application.
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  Synthesis and Characterization of Polyaniline-silver by Double-situ Polymerization

  ;WU Zhen Jun

  . 2014, 45(S1): 12-0.

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  Polyaniline-silver complex was obtained by the double-situ composite method, which was polymerized via the oxidant of both ammonium persulfate and silver nitrate of aniline. Results show that the ratio of ammonium persulfate to silver nitrate and the concentration of nitric acid has a great influence on morphology and the conductivity of silver/polyaniline materials. The morphology and structure of complex were characterized by scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR). Four-probe measurements was employed to investigate electrical conductivity. As 0.2mol/L aniline dissolved in 1.0mol/L nitric acid was polymerized via mixed oxidation with the ratio of 0.4, which can get the homogeneous rod structure and the conductivity of the pellet is up to 10.2755S?cm-1.
工艺 技术
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  Design Optimization for the Coextrusion Molding of the PMMA/PVC Surface Composite Profile

  Qi-Bing wang ;

  . 2014, 45(S1): 14-0.

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  Polymethyl methacrylate（PMMA）/ Polyvinyl chloride（PVC）Surface Composite Profile (hereinafter referred to as composite profile) took the equal flow velocity of each sub-domain on the cross section of the composite profile at the outlet of the coextrusion die as the optimization target through coextrusion molding. The compression gap that had a huge influence on the flow uniformity was taken as the design variable. The finite element numerical simulation was combined to the ERP system and expert database of the CAD/CAE network system extrusion die in the concurrent engineering. It is testified by the case design optimization that the flow velocity uniformity of each region in the composite profile melt at the outlet of the optimized coextrusion die has been improved greatly, the embryo quality of the composite profile has been improved, and its structure size, as well as the performance satisfies the demands well.
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  Performance evaluation of micro-arc oxidation coatings on pure titanium

  . 2014, 45(S1): 15-0.

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  The TiO2 ceramic coating with single component and larger surface area was prepared on pure titanium substrate by a novel process involving treatment of the MAO (micro-arc oxidation) and alkali-heat treatment, and then trained the coating in SBF(simulated body fluid) for the its bioactivity evaluation. The results showed that: The ceramic coating was mainly composed of anatase TiO2, and the porosity of the coating which with uniform porous structure reached 12 %; As a result of the wetting angle with SBF and deionized water, the coating treated by alkali-heat method showed good hydrophilic; The coating treated by alkali-heat method was completely covered by bone-like apatite when it was cultured in SBF for 14 days, and the calcium deficiency apatite grew on the coating which with perfect bioactivity was similar to the human bone in composition.
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  Preparation of CuO nanowires on SOI substrate

  ; ;

  . 2014, 45(S1): 16-0.

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  Preparation of optoelectronic nanodevices on SOI substrate has good prospects in optoelectronic integrated applications. CuO nanowires have been successfully prepared on the SOI substrate at 600 ℃ by the heat treatment method of Cu(OH)2 precursors nanowires, which were pre-prepared by the copper film growth method. Morphology and structures of the samples were characterized by scanning electron microscope (SEM), transmission electron microscopy(TEM),and X-ray diffraction(XRD). The SEM and TEM testing results showed that Cu(OH)2 precursors nanowires were needle-like with consistent structure and smooth and uniform surface. The CuO nanowires were cattail-like with tenuous and smooth structure. The diameter of CuO nanowires was about 80-100 nm, the length of nanowires was about 10 μm. A good crystalline quality of CuO nanowires were obtained.
研究 开发
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  Preparation and performance study of the injectable thermo-sensitive chitosan-based complexity

  ;Qi-Feng DANG ;;; ;;

  . 2014, 45(S1): 17-0.

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  In this article, the injectable thermo-sensitive chitosan-based complexity was prepared. First, Methotrexate (MTX)-loaded chitosan microspheres were prepared with emulsion- chemical cross-linking method using glutaraldehyde as crosslinking agents. CS thermo-sensitive hydrogel was prepared by CS and gycerophosphate using ionic crosslinking method. The thermo-sensitive chitosan-based complexity was composed by CS microspheres and CS hydrogel. The results indicated that the drug-loading efficiency and encapsulation efficiency of CS microspheres were 12.98% and 32.66%, respectively. The microspheres prepared in this study had uniform particle size, good dispersibility and could be injected through needles. The phase could change from the sol state to a gel state at 37℃ in 1min, which indicated the hydrogel prepared in this article had good thermo-sensitivity. The thermo-sensitive chitosan-based complexity had a good ability of injection. In vitro releasing properties of MTX were investigated and the results indicated that 35.65% of the total MTX in the thermo-sensitive chitosan-based complexity was released in the first 4h. The complexity had an ideal releasing effect.
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  Study of InAlN thin films and microstructures grown by MOCVD

  Xun DONG

  . 2014, 45(S1): 18-0.

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  InAlN thin films and microstructures were grown on 3 inch sapphire substrates by MOCVD. In content、surface morphology、electronic properties were characterized by XRD 、AFM and Hall. The results indicated that the In content decrease with increasing growth temperature and the surface of the InAlN film was three dimensional like. High temperature hall tests showed that high temperature electron mobility was much higher for InAlN/GaN compared to AlGaN/GaN heterostructure.
工艺 技术
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  Inversion Analysis of Macro Gradient Function Distributions of Functionally Graded Material Properties

  ;;

  . 2014, 45(S1): 20-0.

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  There are complex microstructures of functionally graded materials, and its internal structure is more complex than the homogeneous material’s. It was difficult to point by point test the parameters distribution of functionally graded materials according to the experimental conditions. In this paper, based on the finite volume method for solving one-dimensional transient wave propagation theory, combined with the D.S.C algorithm to construct inversion mathematical model. In the case of the received wave was known, the Inversion analysis for three commonly used macro-distribution function of functionally graded material parameters were completed by the examples, and achieved satisfactory results. Clearly, this method can greatly induce the test work of the basic mechanical performance of functionally graded materials.
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  Preparation of 12-Tungstophosphoric Acid/ SiO2 Catalyst by In-situ Method and Its Catalytic Performance

  Shui-jin YANG

  . 2014, 45(S1): 21-0.

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  The different loading catalysts of 12-tungstophosphoric acid/SiO2 were prepared by in-situ method. The structure and properties of the catalysts were characterized by FT-IR spectroscopy, X-ray diffraction. It was found that the catalyst containing 20 % H3PW12O40 by calcination at 200 ℃ for 4 h showed a higher catalytic activity. The results show that the 12-tungstophoaphoric acid highly dispersed in hole of SiO2 still keeps the Keggin structure, and has certain chemical interaction with surface hydroxy for SiO2. The catalytic properties of synthetic benzaldehyde 1,2-propanediol acetal show that H3PW12O40/SiO2 catalyst have high catalytic activity. The optimum conditions are: molar ratio of benzaldehyde to 1,2-propylene is 1:1.5, the mass ratio of the catalyst used to the reactants is 1.0%, the volume of cyclohexane as the water-carrying agent is 8 mL, and the reaction time is 60 min, the yield of its can reach 88.5%, and show excellent reusabity.
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  Influence of annealing on the microwave-absorption properties of (NiCo)/TiO2 Nanocomposites

  Zhi-Jie XU

  . 2014, 45(S1): 22-0.

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  Abstract: (NiCo)/TiO2 nanocomposites composed of tetragonal TiO2 (rutile) and cubic NiCo were prepared by ball milling in Ar atmosphere and then annealed at 500 oC for half an hour. The phase structure, morphology, the magnetic properties and the electromagnetism parameters of the (NiCo)/TiO2 nanococomposites were examined by X-ray diffraction, scanning electron microscope, vibrating sample magnetometer and vector net work analyzer. Compared with the as-milled samples, the Bragg reflections of NiCo for the annealed sample are clearly narrowed, suggesting a larger grain size and a smaller microstrain, leading to an increase of saturation magnetization intensity,and a decrease of coercive force. The samples show the behavior of dielectric relaxation and magnetic resonance, and annealing optimizes the microstructure, which leads to significant strengthen of interface polarization and polarization loss in frequency range 12-16 GHz, while the optimal reflection loss decrease from -6.4 dB to -14.8 dB for 8 mm thickness. After annealing the nature resonance peaks at 2.6, 5.3 GHz, and the exchange resonance peaks at 10.5, 13, 15.6 GHz are greatly enhanced.
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  Simulation studies on the expansion and mechanics performance of magnesium alloy stent

  Zhi-Yong HU;;Hai-Quan FENG ;

  . 2014, 45(S1): 23-0.

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  The expansion and mechanics performance of stent is one of important factors to ensure operation success. By using the finite element method (FEM) to simulation and analysis the outer coupling expansion process of the magnesium alloys stent. We have focused the research on the change initial diameter of stent and support length and circumference direction number's influence on the expansion and mechanics performance, explore the stent structure to optimize. The results show that decrease the initial diameter of stent, it's stress and strain reduced by 3.94% and 16.59% respectively; increase the support length of stent, it's stress and strain reduced by 15.76% and 49.50% respectively; increase circumference direction number of support, stress and strain of stent decreased by 8.97% and 31.78% respectively. By changing the three structural parameters can effectively decrease the stress and strain of stent, and the support length impact is bigger. To analysis the optimal design of stent structure through its expansion performance and mechanics performance, and provide assistance for the future magnesium alloy stent optimal design.
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  Preparation and flocculation performance of dimethylallyl quaternary ammonium salts of lignin

  Qiong ZHANG;;MA YANLI;

  . 2014, 45(S1): 24-0.

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  Cationic flocculant, dimethylallyl quaternary ammonium salt of lignin (DL), was synthesized with alkali lignin as raw material, using the cross linker potassium persulfate. Its character was analyzed by FTIR , SEM and TG/DTG, and analysis of its solubility and nitrogen contents. The optimum conditions obtained by monotheism experiments were on the standard of removal rate for acid black ATT as the simulate dye, which include: m(D):m(L)=2:1; 5h of reaction time and 5 wt% of the potassium persulfate. The product behaved as flocculant by electrostatic interactions and bridging actions. The effects of DL on the flocculation performance of acid black ATT was investigated, which the maximum removal rate was 80.06% under the corresponding optimal conditions (3.75 g/L of the flocculant at pH 1.5, 30 °C). This modified natural macromolecule showed a favorable flocculation performance.
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  Preparation and magnetic properties of bulk nanocrystal Sm2Co17 magnets

  ;Yilong Ma ;;;

  . 2014, 45(S1): 25-0.

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  Two kinds of Sm-Co alloys with a 2:17R structure were prepared by arc-melting: Sm2(Fe,Cu,Zr,Co)17 and Sm2Co17. Bulk nanocrystal magnets of these two alloys were prepared by applying high energy ball milling and spark plasma sintering, and their magnetic properties and phase composition were also studied. Sm2(Fe,Cu,Zr,Co)17 alloy has a high coercivity, but Sm2Co17 has a very low coercivity. However, coercivity of Sm2(Fe,Cu,Zr,Co)17 could be deteriorated quickly by ball milling. Bulk nanocrystal magnets were prepared by sintering the amorphous powders using SPS. Bulk nanocrystal Sm2Co17 magnet has a high coercivity and a structure of single 1:7H. On the other hand, Sm2(Fe,Cu,Zr,Co)17 alloy has a higher Ms but a coercivity of about zero due to the formation of Fe-Co and Sm2O3 phases during sintering.
研究 开发
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  Effects of plasma treated TiO2 nanoparticles on Zn - TiO2 composite coating

  ;Pei Ru Tong

  . 2014, 45(S1): 26-0.

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  In order to raise the content of the nonmetallic particles in composite plating, high hardness and good wear resistance composite coating is prepared. Nano TiO2 is processed in N2 plasma, then added to the electricity galvanized liquid Zn- TiO2 composite electroplating. This paper studies the current efficiency, coating hardness and plating coating wear resistance. From the research: when nano TiO2 is processed in N2 plasma,the microhardness of Zn-TiO2 composite coating increased from 165HV to 180HV, and the wear-resisting coefficient of Zn-TiO2 composite coating increased from 0.75 to 0.75. Adding the plasma treatmented TiO2 can improve more than 36% the current efficiency in the electroplating process than without plasma treatment.
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  Preparation of magnetic iron coating by plasma deposition method and research on its electromagnetic performances

  . 2014, 45(S1): 27-0.

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  In order to obtain radar-wave absorbing coating on the surface of metal by one-step. Aluminum alloy as substrate, the magnetic iron coating can be prepared by plasma deposition method. The coating is mostly composed by iron metal analyzed by XRD. The magnetic properties of the coating are the specific saturation magnetization 169.0A?m2/kg, remanence 25.6 A?m2/kg and coercivity 444Oe at room temperature. The specific saturation magnetization, remanence and coercivity of the magnetic iron coating decrease with higher measurement temperature in air. It exhibit good properties of radar-wave absorbing in the range of 2~18GHz.
综述 进展
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  Progressing on Supported Chiral Salen Catalysts

  jin WANG;

  . 2014, 45(S1): 28-0.

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  Abstract：Since chiral salen compounds were synthesized, they have been developing rapidly. Chiral salen compounds are widely used as Catalysis for asymmetric reactions, but it is difficult to achieve industrial production. The immoblization of chiral salen compounds has been found to be more effective to be applied to industrial production, and it has attracted more and more attention. This review summarizes different strategies and development to immoblize chiral salen compounds, going from organic supports, inorganic supports and new types of organic-inorganic hybrid material supports. The analysis and comparison of supported chiral salen compounds are also presented.
研究 开发
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  Research on Twisting of Patterned Ionic Polymer Metal Composite

  ;;;;;

  . 2014, 45(S1): 29-0.

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  Ionic polymer metal composite (IPMC) is a kind of ionic electroactive polymer, which can generate large deformation when applied low driving voltage. It will be widely used in bionic, medical biological and other fields. In this paper, the patterned IPMC was fabricated to accomplish twist motion. To get the twisting characteristic of patterned IPMC, the variation of structural dimension of patterned IPMC was studied. Meanwhile, the structural dimension of patterned IPMC which is pasted two IPMC together was also researched in this paper. The result of two kind of patterned IPMC was compared, which indicate the influencing factors of fabricating of patterned IPMC to realize twist motion.
综述 进展
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  The progress research of graphene-based transparent conductive film using chemical method

  ;zhang dong

  . 2014, 45(S1): 31-0.

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  Graphene as a new two-dimensional material, including excellent light transmittance and conductivity. Compared with the conventional indium tin oxide (ITO), graphene, transparent conductive film has a good application prospect, because of has a higher electrical conductivity, good flexibility and rich resources. This paper focuses on the last three years research progress of graphene-based transparent conductive film using chemical method. Depending on the different of the preparation method of film, focusing on the latest research progress of vacuum filtration method, spin-coating method, self-assembly, langmuir blodgett (LB) and spraying prepared graphene-based transparent conductive films. Meanwhile, the transparent graphene thin films by acid, doping treatment were introduced. Finally, we discussed the unsolved problem of graphene-based transparent conductive films and prospected the future development of graphene-based transparent conductive films.
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  Research progress of photovoltaic effects of ferroelectric BiFeO3 material

  Hai-Min Li

  . 2014, 45(S1): 32-0.

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  The photoelectric conversion efficiency is low because of the light induced voltage of traditional p-n junction solar cells is limited by the built-in electric field, which makes it very difficult to put on the market. Ferroelectric materials Photovoltaic effect is different from the p-n junction solar cells, in which very high open circuit voltage can be test. But at the moment, the photoelectric mechanism of ferroelectric materials is unclear. If the mechanism can be discovered and the ferroelectric materials can be used in solar cells, The photoelectric conversion efficiency can be effectively improved in solar cells. BiFeO3 (BFO) is a very special multiferroic material. in recent years, the photoelectric properties of BFO have been in-depth researched. This paper reviewed latest progress of photovoltaic effect of BFO。
研究 开发
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  Properties of Microstructure, Luminescent and Waves Absorption of Ni/TiO2 Nanocomposites

  . 2014, 45(S1): 33-0.

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  Ni/TiO2 nanocomposites were prepared by the mechanochemical synthesis and then annealed for 30 minutes at 100oC and 200oC. The annealed samples are composed of hexagonal-structure rutile TiO2 and face-centered cubic structure Ni. In comparison with the sample annealed at 100oC, the sample annealed at 200oC has lager grain sizes of Ni and TiO2, and meanwhile the release of the internal strain leads to a decrease of the coercivity. The intrinsic, free exciton, bound exciton and oxygen-defect emission peaks of TiO2 exhibit a blue shift, which is ascribed to the distortion of the band structure. The nonlinear dielectric resonance and natural resonant behavior have been observed in the sample annealed at 100oC. A maximum of reflection loss (RL) as large as -29.6 dB at17.5 GHz with RL values exceeding -10 dB in almost whole Ku-band(12.4-18 GHz) is obtained for a layer of 1.9 mm thickness. In particular, A RL exceeding -10 dB was calculated in the whole X-band (8-12 GHz) for an absorber thickness of 8-10 mm with the optimal RL of -23 dB. The great improvement of microwave-absorption properties for the Ni/TiO2 nanocomposite annealed at 100oC can be ascribed to nonline dielectric resonance, natural resonant and an excellent match of magnetic and dielectric loss.
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  Effect of H2O2 on the planarization efficiency of the copper pattern wafer in the copper clearing step

  Yang Cao

  . 2014, 45(S1): 34-0.

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  The alkaline copper slurry which was made by out own, diluted (X50) as the copper clearing slurry and add different concentration H2O2 into the slurry before used. Experiment results show that as the H2O2 concentration increase, the dissolution rate and polish rate of copper, also the barrier films such as Ta/TaN removal rate have small decrease. But the experiment on the MIT854 pattern wafer in copper clearing step results, the dishing values reduce with the H2O2 concentration increase. The copper clearing slurry with 50ml/L H2O2, after achieved initial planarization, follow the copper clearing step for copper residue removal, the pattern wafer can achieved completely planarization of different linewidths, the dishing values can meet the industrial requirements. These rules paly an important role to achieve global planarization of CMP.
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  Synthesis of Seeondary Doping of the Conduetive Composites of Polyaniline and its Properties

  Hui-Xia FENG ;;

  . 2014, 45(S1): 35-0.

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  In this paper, the preparation of PANI was investigated. PANI doped with NH2SO3H and redoped with HCl was synthesized. The effect of content of acid and oxidant, doping spacing interval on product’s conductivity were discussed. And four probe conductivity apparatus was used to analyze the electric properties of product. The results show that in redoping process, the conductivity of PANI was 3.1746 S?cm-1 when the content of HCl was 1.0 mol?L-1, molar ratio of An:SA:APS was 1:5:0.4, doping spacing interval 3.5 h, the conductive stability was good. Compared with traditional doping method, the amount of SA could reduce about 40% and Conductive stability is better.
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  Study on Preparation of Loaded TiO2 and its Photocatalytic Performance for NO2

  Zhi-Bo SUN; ;;;;;

  . 2014, 45(S1): 36-0.

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  The Photocatalysts that Fe3+/Gd3+ co-doped nanometre TiO2 supported on Hollow Glass Microspheres (HGM) were synthesized by sol-gel method, and characterized by XRD , TEM techniques and DRS.The effects of the different calcination temperature, calcination time , deposition times, photocatalysts amount and reuse times on the photocatalytic activity were studied. Their photocatalytic activities were tested by degradation of nitrite.The results indicated that Hollow Glass Microspheres coated with TiO2 can significantly enhance the photocatalytic activity of nano-particle. To calcinate 500℃ for 2hours, load 2 times and the catalyst inputs for 2.0g/L, has shown the highest catalytic activity, and the degradation percent of nitrite is about 93.81%.
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  Effect of Reaction Temperature on Photoluminescence Properties of Multiwalled Carbon Nanotubes

  . 2014, 45(S1): 37-0.

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  The multiwalled carbon nanotubes were synthesized by a chemical vapor deposition under different temperatures. The optical properties of the samples were measured by using of the SEM graph, micro-Raman spectra, and fluorescence spectra. The experimental results showed that the synthesis of well-distributed carbon nanotubes with less impurities and defects at the reaction temperature of 860℃ was achieved and the carbon nanotubes possessed diameter 110 nm. Different wavelengths and intensities of the samples synthesized under three different temperatures were observed by aids of the photoluminescence (PL) spectra experimentally. In addition, it should be mentioned that luminous intensity at the reaction temperature of 860℃ is strongest one.