聚甲基丙烯酸甲酯表面改性TiO_2的研究

Study on Surface Modification of TiO_2 With Polymethyl Methacrylate

本文采用无皂乳液聚合法，使甲基丙烯酸甲酯（ＭＭＡ）在ＴｉＯ２粒子表面进行聚合，得到了以ＴｉＯ２粒子为核，聚甲基丙烯酸甲酯（ＰＭＭＡ）为壳的复合粒子，ＴｉＯ２粒子表面由此得到改性研究了ＴｉＯ２表面聚合物成膜的条件，用ＴＥＭ证实了表面聚合物膜的存在，运用ＩＲ和ＤＴＡ对复合粒子进行了表征，并利用Ｚｅｔａ电位，接触角的测定及分散性试验对改性前后ＴｉＯ２的表面性质进行了研究。

By means of soapless emulsion polymerization method, the polymerization of methyl methacrylate (MMA) at the suface of titanium dioxide (TiO2) particles has been carried out. In this process, composite particles with a TiO2core and a polymer shell were obtained and thus the surface of titanium dioxide was modified. The conditions affecting formation of film-like polymer at TiO2surface were investigated. The encapsulating polymer was verified by TEM. DTA and IR. In addition, the surface properties of modified TiO2 were studied by Zeta-potential measurements and determination of contact angle and dispersability.