PMMA/SiO_2复合微球在常规乳液体系中的制备及其形态研究  

Preparation of PMMA/SiO_2 Composite Microspheres via Conventional Emulsion Polymerization and its Morphology

作　　者：乔晓光[1] 程新建[2] 武利民[1] 

机构地区：[1]湖北大学化学与材料学院,湖北武汉430062 [2]复旦大学材料科学系,上海200433

出　　处：《高校化学工程学报》2007年第4期665-670,共6页Journal of Chemical Engineering of Chinese Universities

基　　金：湖北省自然科学基金(020-094017);上海市纳米专项(05nm050003)

摘　　要：以4-乙烯基吡啶(4-VP)为辅助单体,分别使用十二烷基硫酸钠(SDS)和OP-40(CA897)作乳化剂,在SiO2存在下用常规乳液聚合合成了PMMA/SiO2复合微球。在阴离子乳化剂体系中,通过改变聚合物乳胶粒大小可以得到不同形态的复合微球,在非离子乳化剂体系中,可以得到草莓型或核-壳形态的SiO2/PMMA复合微球,取决于单体滴加速度、乳化剂的浓度和单体/SiO2比。复合微球的形态通过透射电镜及扫描电镜进行表征。PMMA/SiO2 composite microspheres with different morphologies were prepared via conventional emulsion polymerization with sodium dodecyl sulfate （SDS） or polyoxyethylene otyl phenyl ether （OP-40） as surfactant and 4-VP as the auxiliary monomer. TEM photographs show that in the anionic system, the particle size of the PMMA has great effect on the morphology of the composite microspheres. The PMMA/SiO2 or SiO2/PMMA composite microspheres could be obtained by changing the size of PMMA particles. In the nonionic system, SiO2/PMMA composite microspheres with different morphologies, such as core-shell type or raspberry-like, could be controlled by modulating monomer feed speed, emulsifier content and monomer/silica ratio. The morphologies of these obtained composite microspheres were studied via TEM and SEM.

关 键 词：PMMA/SiO2复合微球 阴离子乳化剂 非离子乳化剂 常规乳液聚合 

分 类 号：TQ316.334[化学工程—高聚物工业]