有机硅单体细乳液的制备及其性能

Preparation of Organic Silicon Monomer Miniemulsion and Its Performance Research

摘要:

以DNS525和DNS500为复合乳化体系（质量比为1:1），采用机械搅拌辅助超声均质的方法制备了γ -甲基丙烯酰氧丙基三（三甲基硅氧基）硅烷（TRIS）的单体细乳液，考察了搅拌时间、超声时间、乳化剂用量、油水比对其稳定性和粒径性能的影响。当机械搅拌60 min ，超声均质15 min,乳化剂用量为6%，油水比为2:3时，在该条件下制得的TRIS均聚细乳液外观呈白色、泛蓝光、均一，凝胶率为0.62%、转化率为98.32%、粒径为226.4 nm、分布宽度系数为0.143。

Abstract:

In this work, monomer miniemulsion of 3-[tris(trimethylsilyoxy)silyl]propylmeth- acrylate(TRIS) was prepared by a method of mechanical stirring with ultrasonic homogenization, with DNS525 and DNS500 as composite emulsifier(mass ratio of DNS525 and DNS500 was 1:1). The effects of mechanical stirring time, ultrasonic homogenization time, dosage of emulsifier, and mass ratio of TRIS and water on performance, stability and particle diameter of TRIS monomer miniemulsion were studied. The optimum condition was obtained as follows: mechanical stirring time was 60min, ultrasonic homogenization time was 15 min, dosage of emulsifier was 6%, mass ratio of TRIS and water was 2:3. The polymer miniemulsion obtained under this condition was white with blue light, homogeneous liquid. The gel content was 0.62%, the conversion rate was 98.32%, average particle diameter was 226.4nm, and the value of polydispersity index was 0.143.