无皂乳液聚合法制备PS/TiO_2核-壳复合微球  

Preparation of PS/TiO_2 core-shell composite microspheres by soap-free emulsion polymerization

作　　者：李海东[1] 高文杰[1] 程凤梅[1] 白福臣 

机构地区：[1]长春工业大学化学工程学院,吉林长春130012 [2]长春应用化学研究所高分子复合材料中心,吉林长春130022

出　　处：《功能材料》2012年第13期1718-1721,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21071142)

摘　　要：采用无皂乳液聚合法制备聚苯乙烯(PS)微球,将所制备的PS微球经磺化吸水后,利用钛酸丁酯作前驱体在乙醇中反应,使TiO2包覆在磺化苯乙烯微球表面,得到有机-无机PS/TiO2复合微球。在所得的杂化微球表面接枝上可聚官能团,利用无皂乳液聚合将聚甲基丙烯酸甲酯聚合到微球表面,得到核-壳-壳杂化微球。用FT-IR、SEM和TGA等方法对所制得的复合微球进行表征。结果表明PS、PS/TiO2及PS/TiO2/PMMA微球表面光滑,球形度好,单分散性良好;通过改变TBOT的加入量可以控制TiO2对PS微球的包覆厚度。A series of polystyrene microspheres was prepared via soap-free emulsion polymerization. Polystyrene microspheres was sulphonated, absorbed water and then the reaction was happened between sulfonated polysty- rene and TiO2 in ethanol with TBOT as a reaction precursor, the surface of sulphonated polystyrene micro- spheres was covered by TiO2 and organic-inorganic compound microspheres was acquired. Tangible functional group was grafted on compound microspheres surface, and core-shell -shell heterozygosity microspheres was ob- tained by grafting methyl methacrylate （MMA） on heterozygosity microspheres surface with soap-free emulsion polymerization. The organic-inorganic compound microspheres were characterized by means of Fourier trans- form infrared spectrometer, scanning electron microscope and thermal gravimetric analysis etc. The results show that PS,PS/TiO2 and PS/TiO2/PMMA microspheres surface smooth, spherical degree good and single good dispersancy;controllable shell thickness by change of the quantity of TBOT to PS/TiO2 composite micro- spheres.

关 键 词：无皂乳液聚合 苯乙烯 TIO2 核-壳 复合微球 

分 类 号：TB333[一般工业技术—材料科学与工程]