Surface modification is one of the core technologies in the field of biomedical materials, its fundamental purpose is to make the surface of the biological material has better biocompatibility. Presently, various surface modification has been developed by different groups, and different methods of surface modification is selected in terms of the application fields and the faced problems of biomaterials, including reducing protein adsorption and coagulation, controlling cell adhesion,growth and differentiation, and improving the mechanical properties, The surface modification technology of cardiovascular biomaterials mainly focus on improving the blood compatibility of the materials and the endothelial cell compatibility, and can be further expanded to tissue engineering and regenerative medicine. In this paper, the research status of cardiovascular biomaterials, the surface biomodification methods and the surface modification technology for different purposes are reviewed, in order to provide important reference for the design and development of a new generation of cardiovascular implantable medical devices.

Graphene has attracted tremendous attention from researchers due to its excellent electrical, thermal, mechanical properties, as well as high optical transparency and large specific surface area, etc. Especially in 2004, stable graphene was successfully gained, it leads to a high tide for the research. To get the graphene which is low cost, large area, high quality and can be applied to practical production is the aim of the researchers. This paper reviews some modified or new preparation methods of the graphene and its potential applications in recent years, from which we can see the huge development potential of the graphene.

N doped TiO₂ nanotube arrays were prepared by anodic oxidation combined with solution processing, and effects of N-doping on photoelectrochemical performances were studied. Surfaces morphologies and phase structures were characterized by X-ray diffractometer and scanning electron microscope, while the content and distribution of N in TiO₂ nanotubes were analyzed by X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and Raman spectroscopy, respectively. Chronoamperometry was used for measuring the photoelectrochemical performances under UV light and visible light respectively. Researches on the photoelectrochemical detection to organics were conducted by using TiO₂(N) NTAs as photo anode and glucose as model organics. Results show that the photocurrents of all doping samples are increased compared with pristine TiO₂ NTAs, in which the UV photocurrent of optimized TiO₂(N40) NTAs increases from 180.4 μA to 256.8 μA, the detection sensitivity increases from 0.061 μA/(μmol/L) to 0.134 μA/(μmol/L). The enhancing mechanism of the photoelectrochemical performances are studied by analyzing the optical performances, recombination rate of photogenerated carriers and electrochemical performances. Increase of optical response range and effective separation of photogenerated carriers contribute to the enhancement of N-doping TiO₂(N) NTAs' photoelectrochemical performances.

Metal hydride hydrogen compression technology has the advantages of good safety, no moving parts, and the ability to use low-grade waste heat. However, this technology has high requirements for the hydrogen sorption plateau pressure, plateau slope, hysteresis of hydrogen storage alloys. In this paper, the influence of the addition of alloying elements on the hydrogen compression properties of BCC structure vanadium-based alloys is studied. The V₇₅Ti₂₀M₅ (M=V, Ti, Cr or Zr) hydrogen compression alloys were prepared by the arc melting method, using volume adsorption method to determinate the PCT curve and kinetic properties, and the plateau slope, hysteresis effect, hydrogen compression ratio and hydrogen reaction rate of the alloy PCT curve were obtained by calculation to compare the hydrogen compression properties of alloys. The results show that the reversible hydrogen storage capacity of V₇₅Ti₂₀Cr₅ alloy is 1.05 wt%. Compared with V₇₅Ti₂₅ alloy, the hydrogen compression rate is significantly improved, and V₇₅Ti₂₀Zr₅ significantly reduces the reversible hydrogen storage, hydrogen compression ratio and hydrogen compression rate of the alloy.

The reduction of graphite oxide is the most possible method to achieve mass production of graphene. A number of methods have been developed to exfoliate graphite oxide, and each method has its own advantages and disadvantages. Thermal exfoliation is the most economical way to obtain large quantities of graphene especially functional graphene. The exfoliation mechanism is mainly based on that the sudden expansion gases evolved into the spaces between graphene sheets during the heat-treatment process of graphite oxide. Thermal exfoliation can be realized when the sudden expansion gases pressure overcomed the attractive van der Waals inter-actions between layers. However，different oxidation and reduction processes make the functional graphene with different properties. In this paper, current research is reviewed, the mechanism of the oxidation and thermal exfoliation is discussed, which may contribute us to effectively use the controllable factors to partially control the preparation of functional graphene.

This article mainly focuses on the current world-wide technology trend of large area （>1.0x1.0 m2）electrochromic smart glasses as building energy efficient windows. We compared and analyzed different technologies in Europe and the US. The mainstream technology for commercialized EC glasses is: All solid-state electrochromic glasses with inorganic transition metal oxides (WO3) as electrochromic materials, Li+ as conducting ions, inorganic compounds or organic polymers containing Li+as electrolytes. We should speed up the commercialization process of this new technology to meet China's growing demands for building energy efficiency.

In this paper, the compressive deformation behavior, samples surfaces and fracture microstructure characteristics have been reviewed at different temperatures and strain rates for bulk metallic glasses (BMGs). BMGs behave like Inhomogeneous brittle fracture, non-Newtonian fluid and Newtonian fluid mode respectively at reduced compressing temperature tr=T/Tg ranging of 77K/Tg ≤tr

Material corrosion and anti-corrosion have always been an indispensable part in material development and application. Epoxy resin is widely used for anti-corrosion due to its excellent anti-corrosion ability, adhesion and mechanical strength. However, with the rapid development of the coatings field, some shortcomings of epoxy resins have been exposed: brittleness, insufficient heat resistance and the existence of holes. In view of these shortcomings, this article summarizes the various modifications of epoxy resin coatings made by domestic and foreign researchers in recent years. First of all, this article summarizes the current mainstream research directions at home and abroad from the selection of modified materials and the innovation of research methods. For the existence of pores, nano micro-inorganic substances with special functions (such as wear resistance, temperature resistance, acid and alkali resistance, etc.) are adopted. Due to poor heat resistance and high brittleness, the epoxy resin has been modified at the molecular level to improve the relevant performance or make the epoxy resin have unique functions. For special applications, bionic design is used to make coatings have antifouling effects, such as hydrophobicity and sterilization, and no pollution to the environment. Secondly, this article also introduces the best anti-corrosion effect of each improved method, and compares the advantages and disadvantages of each method. Finally, the future development trend of epoxy resin anticorrosive coatings is discussed, and the feasibility of various modification schemes in future applications is analyzed.

Abstract: A highly symmetric multi-branched compound (new antioxidant) N,N, N ', N '-[ 1,4 phenylenediamine] – propionate [ 1,2,2,6,6 – pentamethyl ] piperidine alcohol ester which has not been reported in the literature , has been synthesized by transesterification using N, N, N 'N'- tetra methyl propionate - 1, 4 -phenylenediamine and 1,2,2,6,6 – pentamethyl-4-ol as starting materials, and tetraisopropyl orthotitanate as catalyst. The structure of the compound was confirmed by 1H-NMR, liquid-mass spectrometry test (LC-MS), infrared spectrum test (FT-IR), and elemental analysis . In order to study the properties of the new antioxidant, the new antioxidant、antioxidant D ( N-phenyl -β- naphthylamine)、light stabilizer GW-622 were added to the natural rubber,and made a kind of different Rubber diaphragms,and the properties of masterbatch thermooxidative, photooxidative were also determined. The results indicated that, the new antioxidant has good properties of masterbatch thermooxidative and photooxidative.

Platinum iridium alloys possess high chemical stability, excellent mechanical and electrical properties, high temperature resistance and high catalytic activity, and have been widely applied in transportation, biomedical, energy, chemical and other fields. In this paper, the typical application fields of platinum iridium alloys were reviewed, such as electrical contact materials, spark plug electrodes, biomedicine, catalysts and etc. The further developing directions of platinum iridium alloys were discussed briefly.

Organic pyrolytic carbon-coated artificial graphite anode material with a core-shell structure was prepared via a sol-gel and pyrolysis route. The effects of coating amounts and species of carbon resource on the lattice structure, the particle morphology and the electrochemical performance of the modified artificial graphite were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), constant current charge-discharge and cyclic voltammogram (CV) tests. The electrochemical measurements reveal that the sample coated with 5 wt.% PVDF exhibits a stable specific capacity of 360 mAhg-1, a higher initial coulombic efficiency of 88.5%, excellent rate-capability and good cycling stability. This may be mainly attributed to the complete formation and the proper thickness of amorphous carbon film on the surface of graphite particles. The isotropic structure characteristics of amorphous carbon increase the diffusion channels of lithium ions and thus facilitate the electrode reaction process.

Abstract： Al2O3 and Cr3+-doped Al2O3（0.3wt%，1wt%） thin films have been grown on Si(100) substrates by pulsed laser deposition. The as-prepared films show cubic γ-Al2O3 structure. After vacumm annealing at 800 oC for one hour, the crystallinity of the sample was improved. The annealed film presents the diffraction peaks of α-Al2O3 and γ- Al2O3.The SEM image reveals that crystal grains of the films have an average grain size of 250nm and a morphology of bar. The electron energy spectrum shows that element compositions of thin films are almost the same as the according targets. Compared with Al2O3 powder, the intensity of the luminescence peak at 386nm of Al2O3 thin films greatly enhances. This can be ascribed to an increase of oxygen vacancies in the thin films and the concentration of F2+ color centers caused by double-oxygen-vacancy absorbing electrons accordingly enhances. Compared with Al2O3 thin film, the intensity of the luminescence peak at 332nm and 398nm of the annealed Al2O3 thin films greatly enhances, which can be ascribed to an increase of the concentration of color centers (F+、F). The blue shift from 386nm to 381nm of emission peak of Al2O3 thin film after annealing is mainly attributed to release of the internal stress. The photoluminescence spectra of 1wt% Cr3+-doped Al2O3 thin film show two emission peaks at 694 nm and 646 nm, which are caused by electron transition of Cr3 + ions from to 4A2 and 4T2 to 4A2. Keywords: PLD；Cr3+-dopedAl2O3 film；photoluminescence；annealing

The authors have adopted the improved co-solvent method to prepare the large-size thin crystals of semiconducting 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-PEN). The thin crystals show the lateral size as large as a few millimeters and the thickness in a range from 90 nm to 700 nm. Polarized optical microscopy confirms their single crystalline nature and it is found that the size and thickness of the thin crystals increase with the increasing of the solution concentration. X-ray diffraction and SEAD analysis reveals that the crystals exhibit high molecular orientation and high structural ordering. The field effect transistors (FET) based on the TIPS-PEN thin crystals exhibit a high hole mobility of 0.39 cm2V-1s-1, two orders of magnitude larger than those from the cast thin films. The hole mobility is found to increase with decreasing the thickness of the crystals.

Micro arc oxidation of metals and alloys (MAO) involves the interaction between electrolyte and alloy surface at high plasma temperature. In this process, the formation of porous layer on alloy surface is not only closely related to electrolyte composition, but also plays an important role in coating structure and electrical properties. In this paper, MAO of binary Ti Al alloys with different Al content is carried out by adding 0.15 M KOH and 0.1 M Na₂B₄O₇ electrolyte The effect of alloy composition on coating structure in micro arc oxidation process was investigated. Scanning electron microscope (SEM) and 3D laser confocal microscope analyzed the morphology and oxide accumulation thickness of the coating, and contact angle tester measured the hydrophilic properties of MAO coating. The results showed that with the increase of matrix Al content, the MAO process was more intense, which would promote the uniform formation of the coating, increase the hole size, oxide accumulation and voltage value. The coatings show good hydrophilicity, and the increase of Al content makes the coating more uniform, resulting in better hydrophilicity.

A novel mineral oil-based magnetorheological fluids was prepared with carbonyl iron powder for magnetic particle and SiO2 particles as thixotropic agent，The effect of particle size of SiO2 on magnetorheology, stability and tribological performance of magnetorheologicalfluids was studied by measuring the zero field viscosity, rheological curve, sedimentation rate, and the friction coefficient et al.. The results indicated that the SiO2 with middle particle size as a thixotropic agent could significantly improve the zero-field viscosity, and field-induced shear stress was enhanced with SiO2 in small particle size. Sedimentation stability was improved significantly with the increase of the particle size of SiO2, but the dispersion performance was poor with larger apparent viscosity of sediment. In addition the magnetorheological fluid showed good anti-friction performance with average SiO2 particle size in 15nm and 100nm.

With the rapid development of shape memory composites, polyvinyl alcohol (PVA) based shape memory composites with good biocompatibility are receiving widespread attention. The preparation method of PVA based shape memory composites, such as physical blending methods of solution casting, cyclic freezing and thawing, in-situ polymerization blending, physical embedding, laminating, coprecipitating, and blending followed by supercritical drying and chemical crosslinking methods were introduced. The characteristics and research progress of above-mentioned preparing methods were also discussed in details. The related application research and progress of PVA based shape memory composites on biomedical fields, such as drug sustained release, scaffolds for tissue engineering and photosensor were analyzed and discussed. Finally, it was proposed that the development of PVA based composites with multi-stimulus response and multi-functionality would be the research trend of shape memory composite materials in the future. PVA based shape memory composite materials with excellent comprehensive properties would play an important role in the field of biomedical composite materials.

In recent years, with the rapid development of flexible wearable devices, tactile feedback devices, energy harvesters and other fields, dielectric elastomers (DE) and supercapacitors (SC) has attracted much attention, due to energy increase, high energy storage efficiency, and compactness, having a very wide range of applications. Since the performance of the flexible electrode directly affects the power generation and driving efficiency of DE and the energy storage efficiency of SC, it is an important part of DE and SC. Here, based on the different types of flexible electrode materials, this article first introduces several typical electrode materials and their properties, such as carbon electrodes, metal electrodes, and composite electrodes. Then, the preparation method of the electrode is described. Then, the application of DE and SC assembled from flexible electrode materials in various fields is summarized, and the problems and challenges faced by electrode materials are analyzed. Finally, the development trend of flexible electrode materials is prospected.

The cell outer membrane mimetic structures of nanoparticles were prepared using methacrylic acid (MA), 2-methacryloyloxyethyl phosphorylcholine (MPC) as monomer, potassium persulfate (KPS) and chitosan by template polymerization. The size distribution and structure properties of nanoparticles were characterized by transmission electron microscopy (TEM), dynamic light scattering (DLS) and Zeta potential. The drug release properties of nanoparticles were estimated by doxorubicin in vitro release experiment. That cell outer membrane mimetic structures of nanoparticles may have potential applications in the ?elds of gene therapy and drug delivery. The controlled release properties had been an important academic significance on the study of outer cell membrane structures of nanoparticles.

The performance of materials based on barium strontium titanate (BST) in recent years was reviewed. The effects of different preparation conditions, different substrates and doping on the performance of BST were discussed, and the prospect of improving the performance of barium strontium titanate was presented. The electrical properties of BST were affected by physical characteristics. The density and microstructure of BST were affected by controlling the manufacturing process parameters or adding dopants, thereby improving the dielectric properties and further affecting the energy storage density of the material. Bi-doped BST ceramics exhibited typical relaxation properties. The substitution of Zr improved the frequency stability of the dielectric constant and reduced the dielectric loss obviously. The doping of Mn could effectively suppress the dielectric loss, and a proper amount of doping could improve the recoverable energy density and efficiency. Moderate cerium doping was beneficial to improve the dielectric properties. Doping of chlorophyll was expected to reduce the crystal defects and increase the intensity of the material, while improving the reflectivity of the sample.

Fe3O4 nanoparticles were prepared through thermal decomposition method and coated by SiO2 using ethyl orthosilicate,then grafted N-[3-(Trimethoxysilyl)-propyl]- ethylenediamine on the surface to prepare amino-functionalized magnetic nano- composite particles Fe3O4@SiO2-NH2. The sample was characterized by TEM, VSM, XRD, FTIR respectively. The adsorption of Pb2+ from wastewater was also investigated under many different conditions. The results showed that the sample with core-shell structure has uniform size of average 50nm,there are rich amino functional groups on the surface. The result of VSM indicated that the sample was superparamagnetic.The experiments demonstrated the sample have excellent adsorptive capacity of Pb2+,which will be used to deal leaded wastewater as a promising adsorbent.

Effect of the times of thermo-mechanical training on the shape memory of Fe-Mn-Si shape memory alloy was studied in this paper. The results show that with the increase of the number of training, alloy strain recovery rate rises to the highest 1.95% after three training sessions and then begins to decrease. Microstructure analysis showed that the rise of it in the initial stage could be attributed mainly to thermo-mechanical training, inducing martensitic preferred orientation and resulting in a uniform distribution of martensite which is running parallel with each other with few of crossover. While the decrease of the recovery rate is primarily due to the serious dislocation tangle forming inside the alloy matrix, which leads to irreversible plastic deformation.

The increasing development of the atomic energy industry has brought about potential safety hazards such as nuclear leakage and nuclear pollution. People must take strict protective measures to protect the health of nuclear facilities staffs and environmental safety. Among the various types of nuclear radiation, neutrons and gamma rays have the strongest penetrability, which are the most difficult to be shielded. However, traditional neutron shielding materials such as boron, water, polyethylene, and gamma-ray shielding materials such as lead, iron, and tungsten have single shielding functions, limited shielding performance, or poor thermodynamic properties, making it difficult to meet modern radiological protection requirements. In this regard, composite materials can combine the advantages of various raw materials which can realize the complementary performance and expand application area of the radiation shielding materials. At present, a large number of composite shielding materials have been developed and applied. According to different substrates, it can be divided into five categories as follow: (1) polymer-based composite shielding materials; (2) metal-based composite shielding materials; (3) shielding concrete; (4) glass-based composite shielding materials; (5) ceramic-based composite shielding materials. In this paper, the mechanism of the interaction between neutrons and gamma rays and atoms is briefly summarized. The research progress of composite shielding materials, and the research content and characteristics of each type of composite shielding materials are detailed reviewed. In addition, the problems to be solved in the current research about composite shielding materials are pointed out and future research trends are predicted.

The Cu/AuSn20/Ni (mass percent) joint was prepared by the reflow bonding process, and the microstructure and shear strength of the Cu/AuSn20/Ni joint were investigated. The results showed that, the solder formed a (Au5Sn+AuSn) eutectic microstructure after reflow at 300℃ for a short time, and the cellular-like (Au,Cu)5Sn intermetallic compound (IMC) was formed at the upper Cu/AuSn20 interface, while the flake-like (Ni,Au)3Sn2 IMC was formed at the lower AuSn20/Ni interface. Upon increasing the reflow time, more and more Cu(Ni) atoms from the subtrates diffused into the solder, resulting the shift of chemical composition of the solder. So that the (Au,Cu)5Sn phase at the upper Cu/AuSn20 interface transformed into the ζ(Cu) solid solution. The (Ni,Au)3Sn2 phase at the lower AuSn20/Ni interface grew gradually to form a continuous IMC layer. The eutectic microstructure in the solder vanished and the final microstructure of Cu/AuSn20/Ni joint was composed of the ζ(Cu) solid solution and (Ni,Au)3Sn2 IMC layer.The shear strength of the Cu/AuSn20/Ni joint increased slightly with the incresing of the reflow time.

Ag+-modified 13X zeolites were prepared by calcinations and metallic ion exchange in nitrate solution and used for adsorptive desulfurization of fuel. Different metallic ion effect the desulfurization capacity by the order of Ag+＞Ni2+＞Zn2+＞Fe3+, it also conform to Hard-Soft Acid-Base Theory. Calcinations influence the modification through temperature and time, and the optimal conditions are 450 ℃ and 6 hours, respectively. SEM、XRD and BET characterization indicate the modification did not change the framework of porous solid materials. Fix-bed experiments were carried out with thiophene dissolved in n-heptane as model gasoline, and the results illustrate the Ag+-modified 13X zeolites have higher desulfurization capacity than 13X.

High entropy alloys are emerging field in recent years. Different from traditional alloys, they are generally composed of five or more major elements, with the content of each principal element ranging from 5% to 35% (atomic fraction). Many elements are disordered but have simple phase structure. High entropy alloys have obvious advantages and huge development space. Refractory metal based refractory high entropy alloys have great concern in recent years. Refractory metal alloy with three or more high entropy is called refractory high entropy alloys. Due to the high melting point of refractory metal, the refractory high entropy alloys show good high temperature mechanical properties, high temperature oxidation resistance and corrosion resistance, which are welcomed by the mass and expected to replace the traditional high temperature alloy. In this paper, the preparation method, phase structure, mechanical properties, oxidation resistance and corrosion resistance of refractory high entropy alloys are described in detail. Finally, the development of refractory high entropy alloys are prospected.

Highly ordered TiO2 nanorod arrays were prepared on glass substrate by using hydrothermal method. The characterization of TiO2 nanorod arrays was studied by using scanning electron microscope (SEM) and X-ray diffraction (XRD) analysis. Results showed that TiO2 nanorod arrays had highly crystallized rutile phase, better verticality on the substrate and density arrays when ratio of acid to deionized water was 1.0.

Oleophobic/superoleophobic surface is widely concerned now because of its wide application prospect in the prevention of biological adhesion and oil-resistant materials. In this paper, the related theory of surface wettability and classical physics model were introduced, the preparation and processing methods of oleophobic/superoleophobic surface were summarized, the further research and development were prospected, and the reference for oleophobic/superoleophobic surface to the further research was provided.

Thermosetting polyimide resins were polymer materials with repetitive structure (—C—N—C—). They could not be dissolved and melted after cured, but just be moulded by one-time thermoforming. There were three kinds of moulding process for PI: hot press moulding, autoclave moulding, and cold press and sintering, and the moulding temperature, pressure and time were changing by different raw monomer. These three kinds of moulding process had merits and demerits respectively. There were phenomenon of non-uniform heating on PI product, because the moulding process belong to external heating radiation. A new idea of moulding process for thermosetting PI by promoting chain movement with electromagnetic wave was put forward.

Modified polyolefin microporous membrane was prepared as the separator for Li-ion batteries by surface radiation coating of methoxy poly (ethylene oxide) acrylate ester. The modified membrane can be well wetted by liquid electrolyte. The ion conductivity of the membrane is easily achieved by absorbing the liquid electrolyte due to the high amphoteric character surface. With the modified membrane as a separator, the graphite/cathode cell exhibited a good capacity retention.It is also found that the Li-ion cell fabricated in this manner not only has stable capacity retention, but also show good high-rate performance.

In this paper, different coupling agents were used to modify the luminescent powder and the change of sedimentation properties of luminescent powder in aqueous NMMO solution was compared, and then a suitable titanate coupling agent was chosen to improve the dispersion stability of luminescent powder in NMMO solution. Moreover, the long afterglow luminescent Lyocell fibers were spun by the dry-jet wet spinning process. The results showed that the tensile strength of fibers was improved after the treatment of the coupling agent. With the increase of luminescent powder content, the degree of crystallinity and the thermal property of fibers were decreased slightly, whereas the initial luminescent intensity was improved. When the content of the uminescent powder was more than 10wt%, the afterglow decay-time constants of luminescent Lyocell fibers were increased significantly, and the afterglow property of fibers was improved.

Structural features of fibers during the preparation of PAN carbonized fiber were investigated by X-ray diffraction including both two-dimensional and plane scanning examinations. The differences of crystalline structures and crystalline orientation of dry-jet-wet spinning precursor fibers during pre-oxidation and carbonization were revealed. The results show that the evolutional laws of orientation and crystallinity of fibers in the different stages are observed intuitively by the two-dimensional diffraction patterns in the equatorial direction. Compared with the precursor fiber, the orientation, crystalline size and crystallinity are increased and the interplanar spacing has no obvious change for 205℃pre-oxidized fibers. While, for 235℃pre-oxidized fibers, the orientation, crystalline size and crystallinity are decreased and the interplanar spacing is increased. Compared with the precursor fiber and pre-oxidized fibers, the orientation, crystalline size, crystallinity and interplanar spacing of fibers are decreased obviously during the carbonization.

The mechanism of hydrogen plasma passivation for poly-Si thin films has been investigated. It has been found that different kind of hydrogen plasma radical is responsible for different defects passivation for poly-Si. The Hα with low energy is mainly responsible for passivating the dangling-bond defects. The H* with higher energy may passivate the defects related to Ni impurity around the grain boundaries more effectively. In addition, the Hβ and Hγ with the highest energy are required to passivate intra-grain defects. These analysis and results are very usable to optimize the H plasma passivation and make the passivation more effective.

The gold nano material is prepared by a chemical reduction method, and with sodium citrate as a reducing agent, chloroauric acid is reduced by heating to obtain an aqueous solution of gold nano particles. Using ultraviolet-visible absorption spectroscopy, the influence of preparation process parameters on product size and product generation rate is studied. The results show that the concentration ratio of reactants, the order of reactants and the pH of the solution affect the size of the product to a certain extent, and the holding temperature, holding time and stirring rate have a greater influence on the rate of product formation. Here, the related factors influencing the formation process of gold nanoparticles are analyzed.

Polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) was synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization. The amphiphlic block copolymer, Polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) was evidenced by the means of 1H-NMR. This amphiphilic block copolymer was then dissolved in the toluene，which is a selective solvent for PS and P4VP respectively. And then studied the self-assembly behavior. Some testes show that the polymer in certain conditions can self-assemble into vesicle-like structures, which as an in-situ reactor successful preparation of nanosized silver composite materials. The result was characterized by UV-Vis spectra、X-ray diffraction (XRD)、scanning electron microscopy (SEM) and energy dispersive spectrometer（EDS）.

More Printed Circuit Boards(PCB) would be produced with the development of electronic industry. And more microdrills for PCB woluld be needed. This paper describes the development of microdrill material. And The Development of the Manufacturing Technique was discussed in details. Our country should do more work on the study of the rheology of powder extrusion,new formagen, forming process, coating technology and equipment matching technology.

Calcium alginate/gelatin (semi) interpenetrating polymer networks (IPNs) were prepared with oxidized sodium alginate as a crosslinking agent. The structure and thermal stabilities of (semi) IPNs were characterized by Fourier transform infrared spectrometer (FTIR) and thermogravimetric analysis (TGA), respectively. And in contrast with calculated TGA data, the reactive mechanism in the blending process was studied. Compared with the thermal stabilities of (semi) IPNs crosslinked with glutaraldehyde, the results indicated that the thermal stabilities of (semi) IPNs crosslinked with oxidized sodium alginate were similar to those crosslinked with glutaraldehyde. And oxidized sodium alginate could be instead of toxic glutaraldehyde to crosslink the calcium alginate/gelatin (semi) IPNs system, and physical and/or chemical reaction may take place in the blending process.

Tantalum carbide (TaC) coating was prepared on high-purity, high-density graphite by high-temperature chemical vapor deposition (CVD). The effects of gasification temperatures, flow rates and deposition temperatures on the surface qualities of TaC coating were investigated. And then, the technical conditions of TaC coating prepared by CVD method were confirmed. Finally, TaC coatings with high densities were obtained.

Cobalt tetrasulfophthalocyanine (CoPcS) was synthesized, characterized by Matrix-Assisted Laser Desorption/Ionization Time of Flight Mass Spectra (TOF-MS), Fourier Transform Infrared Spectra(FT-IR)and Ultraviolet and Visible Spectra (UV-Vis). CoPcS modified by cyanuric chloride was supported onto silk fibers(SF) to obtain a novel supported catalyst (CoPcS-SF). The catalytic oxidation activity for Acid Orange Ⅱ (AO2) was investigated in the presence of H2O2. The experimental results showed that AO2 could be efficiently decomposed in CoPcS-SF and H2O2, and more than 97% of AO2 in 60 min was eliminated at initial pH 7. Moreover, CoPcS-SF could be recycled. The effects of pH, the electrolyte of NaCl and temperature indicated the reaction could efficiently proceed in a wide pH range from 3 to 9, and the reaction rate could be obviously enhanced when NaCl was present, increasing with the elevation of the temperature. FT-IR and Gas Chromatography/Mass Spectrometry (GC-MS) analysis showed that AO2 was mainly oxidized into some small molecular biodegradable aliphatic carboxylic compounds such as maleic acid, fumaric acid, succinic acid, etc.

Low-cycle fatigue behavior of cast AlSi9Cu3 aluminum alloy under different strain amplitudes were studied. Fatigue behavior were tested by MTS, the relationship between strain amplitude and fatigue life were revealed . Fatigue fracture were analyzed by optical and scanning electron microscope. The research results show that :under low-cycle fatigue loading condition ,the cast AlSi9Cu3 aluminum alloy can exhibit the continuous cyclic strain hardening or initial cyclic strain hardening followed by cyclic stability, and the bigger of strain amplitude, the higher of hardening rate; A single-slope linear relation between plastic strain amplitude, elastic strain amplitude and reversals to failure is observed from cast alloy ,the experimental results conform to the Coffin - Manson formula. Fatigue fracture of material observed by SEM, the width of the fatigue stripes is related to strain amplitude, fatigue damage is related to the strain amplitude also.

The effect of polyethylene glycol (PEG) molecular weight and concentration on the performance of PES hollow-fiber membranes, fabricated by phase inversion process, was investigated. The results demonstrated that the rejection and tensile strength decrease gradually when the PEG molecular weight increases from 600 to 20000. Meanwhile, the pure water flux first increases and then decreases, which reaches the maximum value of 177.41 L/h?m2 at the PEG molecular weight of 6000. In addition, with the increase of the PEG-6000 concentration from 4% to 10%, the pure water flux gradually increases, whereas both the rejection and tensile strength gradually decrease.