以硅烷偶联剂(KH-570)对纳米TiO2/Ag+进行表面处理,对处理后的纳米TiO2/Ag+进行表征后证实,硅烷偶联剂以化学键的形式键合在纳米TiO2的表面.采用原位乳液聚合方法制得载银纳米TiO2/苯乙烯-丙烯酸酯复合乳液,TEM测试表明纳米TiO2被均匀地包覆在乳液中.采用该复合乳液为基料与各助剂等原料按一定比例配制成涂料,经性能测试后表明,与普通共混制得的涂料相比,该涂料的抗菌性能得到明显的提高,并且有很强的紫外光吸收性能.%Nano-TiO2was modified by γ methacryloxy propyl trimethoxy silane (KH-570). Nano-TiO2/ styrene-acrylic resin composite emulsion was synthesized by in situ emulsion polymerization. Results indicate that KH-570 is covalently bonded to the surface of nano-TiO2 during the modification reaction, which were confirmed by Fourier transform infrared (FT-IR) spectrometry and transmission electron microscopy (TEM). TEM shows that nano-TiO2 is dispersed at nanometer level and distributed uniformly in the composite emulsion. Coatings were prepared by using the composite emulsion as .binder with additives and other materials. Results show that the antibacterial activity of the coatings with modified nano-TiO2 is greatly improved, comparing with the coatings with unmodified nano-TiO2. It also presents perfect UV resistant property.
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