二氧化钛纳米管稳定Pickering乳液制备PS/TiO_2纳米管复合微球  

Polystyrene/TiO_2 nanotubes composite microspheres fabricated via Pickering emulsion polymerization stabilized by TiO_2 nanotubes

作　　者：张方[1] 史铁钧[1] 周讯[1] 周海鸥[1] 吴竟[1] 

机构地区：[1]合肥工业大学化工学院,安徽合肥230009

出　　处：《化工学报》2014年第4期1526-1530,共5页CIESC Journal

基　　金：国家自然科学基金项目(51273054)~~

摘　　要：利用γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570),对水热法制备的TiO2纳米管进行了表面改性,并用改性的纳米管为稳定剂,采用Pickering乳液聚合法制备了聚苯乙烯/TiO2纳米管复合微球。采用红外光谱(IR)、光学显微镜、高分辨透射电镜(HRTEM)、高分辨扫描电子显微镜(FESEM)、X射线光电子能谱(XPS)等分析手段,对改性前后TiO2纳米管以及复合微球的结构和形貌进行了表征,用三相接触角仪测试并优化了TiO2纳米管的表面润湿性。研究结果表明,当mKH-570/mTiO2=15%时,改性TiO2纳米管表面润湿性最佳,能很好地稳定Pickering乳液聚合,聚合后可以得到壳层为致密均匀TiO2纳米管,核为聚苯乙烯的复合微球。TiO2 nanotube prepared via the hydrothermal method was modified with KH-570 and then the modified TiO2 nanotube was used as an emulsifier to fabricate PS/TiO2 nanotube composite microspheres via Picketing emulsion polymerization. The TiO2 nanotubes and composite microspheres were characterized by IR, optical microscope, HRTEM, FESEM and XPS. The surface wettability of TiO2 was measured with contact angle meter. When the value of mKH-570/mTiO2 was 0.15, the modified TiO2 nanotube possessed the best surface wettability and it could satisfactorily stabilize the St-in-water Picketing emulsion polymerization. And then the composite microspheres with PS nucleus and dense, homogeneous TiO2 nanotubes shells could be obtained via Pickering emulsion polymerization.

关 键 词：TIO2纳米管 水热法 Pickering乳液 复合微球 

分 类 号：O631[理学—高分子化学]