Surface Modification of Nanometer TiO_2 and Effect of Preparing TiO_2/P(St-co-DVB) Composites by Dispersion Polymerization

Surface modification of nanometer titanium dioxide particles and effect of preparing TiO2/P （St-co-DVB） composites by dispersion polymerization are described. To introduce vinyl group onto the surface of titanium dioxide particles, the titanium dioxide particles were surface-modified with a silicane coupling agent, methacryloylpropyltrimethoxysilicane. Polymer encapsulation in the presence of either modified-titanium dioxide particles or unmodified-titanium dioxide particles was carried out by dispersion polymerization of styrene, divinylbenzene in ethanol medium with polyvinylpyrroliclone as stabilizer, and 2, 2＇-azobis（isobutyronitrile） as initiator. The modified-titanium dioxide was analyzed with Fourier-transform infrared spectroscopy（FTIR）, UV-Vis spectrophotometer, thermo-gravimetric analysis and transmission microscope. The polymer encapsulation of modified-titanium dioxide and unmodified-titanium dioxide particles was confirmed with FTIR and transmission electron microscope. Results show that compared with unmodified-titanium dioxide, modified-titanium dioxide is more suitable for preparing inorganic core/orclanic shell composites.

纳米二氧化钛粒子的表面修正和准备 TiO_2 P (St-co-DVB ) 的效果由分散聚合的 composites 被描述。介绍乙烯基到二氧化钛粒子的表面上，与联合代理人的甲矽烷修改 weresurface 的二氧化钛粒子， methacryloylpropyltrimethoxysilicane。Polymerencapsulation 面对也，修改钛的二氧化物粒子或 unmodified-titaniumdioxide 粒子被苯乙烯的分散聚合执行，在与中等的乙醇的二乙烯基苯象 stabilizer 做 polyvinylpyrroli，并且 2， 2 英尺 -azobis(isobutyronitrile) 是开始者。修改钛的二氧化物与 Fourier 变换被分析红外线的光谱学(FTIR ) ，紫外力的分光光度计， thermo-gravimetric 分析和传播显微镜。修改钛的二氧化物和未修改钛的二氧化物粒子的 Thepolymer 封装与 FTIR 和传播电子显微镜被证实。结果显示出那比较 withunmodified 钛二氧化物，修改钛的二氧化物对准备无机的核心更合适器官的壳 composites。