铁氮共掺杂纳米TiO2的水热法制备及其在可见光下抗菌性能的研究

以硫酸氧钛为前驱体，硝酸铁和盐酸胍作为掺杂的铁源和氮源，采用水热法制备了铁氮共掺杂纳米TiO2粉体。利用XRD、BET对样品进行表征，研究了掺杂后TiO2粉体的晶型、粒径、比表面积等性能。结果表明，所制备的共掺杂TiO2粉体呈黄色，均为锐钛矿相TiO2，经谢尔公式计算其粒径约为10nm，比表面积分布为（135～150）m^2／g。采用紫外．可见光漫反射光谱对样品进行表征，结果表明经过铁氮共掺杂改性后的TiO2具有很强的紫外线的吸收能力，并实现了良好的可见光响应。采用菌落计数法进行了样品抗菌性能的研究，在可见光照射下样品对大肠杆菌表现出良好的杀灭性能。     

芯壳乳液胶粘剂的研究

介绍乙酸乙烯酯－丙烯酸丁酯－丙烯酸芯结构乳液的制备方法，并将它们的性能与均匀共聚乳液作了测试与比较。     

核壳型二氧化钛复合纳米材料研究进展

核壳材料由中心核和外部壳层组成，因其组成、大小、结构的不同，性能优于普通材料。二氧化钛具有优异的光、电和化学等特性可作为理想的核壳材料。从二氧化钛作为核壳型复合纳米材料的核、壳及核壳结构的载体3个方面出发，介绍了核壳型结构的二氧化钛复合纳米材料的分类、制备、性质及应用概况，并对其发展前景及存在问题进行了简要概述。     

A new core–shell type fluorinated acrylic and siliconated polyurethane hybrid emulsion

A novel core–shell type fluorinated acrylic and siliconated polyurethane (FSiPUA) hybrid emulsion was prepared by seeded emulsion polymerization using siliconated polyurethane (SiPU) as a seed and forming the structure with SiPU as a shell and the copolymer of butyl acrylate (BA) with 2,2,2-trifluoroethylmethacrylate (TFEMA) as a core. SiPU was synthesized using isophorone diisocyanate (IPDI), polytetramethylene ether glycol (PTMG), polypropylene glycol (PPG), dihydroxybutyl-terminated polydimethylsiloxane (PDMS), dimethylol propionic acid (DMPA), 1,6-hexanediol (HDO) and triethylamine (TEA). The contents of siloxane and fluorine were determined according to the feed ratio. Fourier transform infrared spectroscopy (FTIR) was used to identify the chain structure of SiPU and FSiPUA. Investigation of transmission electron microscopy (TEM) confirmed the core–shell structure of FSiPUA emulsion and gave the particle size at about 50 nm. The measurement results of water contact angles and the solvent absorptions in water and n-octane for cured films showed that the water and the oil repellency for FSiPUA had been improved significantly with a suitable content of fluorine and siloxane.     

皮革涂料用丙烯酸酯核-壳乳液的研制

采用种子乳液聚合法，以交联型软性聚合物为核，交联型硬性高聚物为壳，合成了具有优异耐寒性及高温抗回粘性聚合物。讨论了乳化剂种类及应用、核／壳比等对聚合物性能的影响。     

(Ag)_核·(Au)_壳复合纳米粒子的制备

以银原子团簇作晶种,采用微波高压液相合成法制备了分散性好、规则球形的(Ag)核·(Au)壳复合纳米粒子。研究了(Ag)核·(Au)壳复合纳米粒子的紫外可见吸收光谱和共振散射光谱特性。结果表明,液相(Ag)核·(Au)壳复合纳米粒子和高压微波合成的液相金纳米粒子的最强共振散射峰均在580nm处,它们的吸收光谱图相似,最大吸收分别在518.5nm和524.8nm。     

Swelling kinetics of a hydrogel of poly(ethylene glycol) and poly(acrylamide‐co‐styrene)

A hydrogel incorporating the hydrophilic polymer poly(ethylene glycol) and a copolymer of acrylamide and styrene was synthesized, and the dynamics of the water‐sorption process were studied. The effects of the composition of the hydrogel and the temperature of the swelling medium were investigated with respect to the water‐sorption characteristics of the hydrogel, and the kinetic parameters, including the swelling exponent and diffusion constant, were evaluated. The hydrogel was also judged for the antithrombogenic property of its surface. The experimental findings were explained on the basis of the core–shell polymeric structure of the hydrogel. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 1419–1428, 2002     

2000m3低温丙烯球罐球壳板型式和材料的选择

大型球罐球壳板型式和材料的选择是设计的首要环节,从这两方面论述了设计时选择的过程。     

Criterion for Selecting Composite Materials for Explosion Containment Structures (Review)

Experimental data on the dynamic response and strength of simple shells of fiber composites are used to justify the choice of these materials for the load-bearing shells of blast-proof structures. It is shown that in such structures composites are preferred to homogeneous metal alloys (structural steels) to eliminate strong scale effects of an energetic nature. A criterion for selecting fibers is proposed and justified experimentally, and reinforcement patterns are determined to obtain optimal (in the strength-mass ratio) compositions for the load-bearing shells of blast-proof containers and chambers. __________ Translated from Fizika Goreniya i Vzryva, Vol. 41, No. 5, pp. 3–13, September–October, 2005.     

Investigation of the effect of surface phosphate ester dispersant on viscosity by coarse-grain modeling of BaTiO slurry

To understand the role of phosphate ester dispersant, we investigated the rheology of a BaTiO slurry. For the model case, a coarse-grain molecular dynamics (CGMD) simulation was performed with the butyral polymer didodecyl hydrogen phosphate (DHP) in the toluene/ethanol solvent. By systematically analyzing the effect of DHP from an atomic-scale first principle and from all-atom MD to microscale CGMD simulation, we investigated how the adsorption of a DHP dispersant on a BaTiO surface affects the microstructure rheology of a BaTiO slurry. The first-principle and all-atom MD simulation suggests that DHP molecules prefer to locate near the BaTiO surface. CGMD simulation shows a reduction in viscosity with an increase in dispersants, suggesting that the dispersant population near the BaTiO surface plays a key role in controlling the rheology of the BaTiO slurry. In this study, we propose an approach for understanding the BaTiO slurry with molecular-level simulations, which would be a useful tool for efficient optimization of slurry preparation.