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以硅烷偶联剂KH-560对纳米TiO2进行表面处理,应用亲油化度值测试和分散稳定性测试方法得到表面改性的最佳实验条件为:KH-560的添加量(占纳米TiO2的质量百分比)8%,温度70~78℃,时间5h。采用适当的乳液聚合工艺,制备了纳米TiO2/聚苯乙烯-丙烯酸酯复合乳液,对表面处理后的纳米TiO2及复合乳液进行表征后证实,硅烷偶联剂以化学键的形式键合在纳米TiO2的表面,TEM照片有力地证明了在复合乳液中纳米TiO2均匀地分散在苯丙乳胶粒中。
The surface of nano-TiO2 was treated with silane coupling agent KH-560. The optimum experimental conditions for the surface modification of the nano-TiO2 were as follows: the amount of KH-560 Mass percentage) 8%, temperature 70 ~ 78 ℃, time 5h. The nano-TiO2 / polystyrene-acrylate composite emulsion was prepared by the appropriate emulsion polymerization process. The surface treated nano-TiO2 and composite emulsion were characterized and confirmed that the silane coupling agent was chemically bonded to the nano-TiO2 The surface and TEM images strongly proved that nano-TiO2 was uniformly dispersed in styrene-acrylic latex particles in the composite emulsion.