高硅溶胶含量复合乳液的研究

制备了高硅溶胶含量的硅溶胶/丙烯酸酯复合乳液,通过粒径大小及其分布和Zeta电位等的测试,研究了引发体系、硅溶胶含量对复合乳液体系的影响。结果表明,对于复合乳液聚合,氧化还原引发体系对乳液稳定性的影响远远优于热引发体系;当硅溶胶含量达到45%～50%时,体系的稳定性、黏度等最佳,粒径最小,粒径分布最窄,Zeta电位最大。

Study on high inorganic content composite emulsion of SiO2 sol

Silica sol/polyacrylate composite emulsion with high content of silica sol was synthesized. The influences of initial systems and content of silica sol on composite emulsion system were studied by means of particle size and its distribution and Zeta potentials. The results showed that for composite emulsion polymerization the stability of composite emulsion induced by redox system was more excellent than that induced by heat system. When silica sol content was up to 45%-50%, the system achieved the optimum properties, exhibiting the best stability and viscosity, the minimum particle size, the narrowest particle distribution and the highest Zeta potentials.