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Surface modification of nanometer titanium dioxide particles and effect of preparing TiO_2/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 polyvinylpyrroli-done 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/organic shell composites. 相似文献
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