文献类型：期刊文献

英文题名：Stabilization of Pickering Emulsions by Hairy Nanoparticles Bearing Polyanions

作者：Zhang, Ying[1];Chen, Kaimin[2];Cao, Lan[1];Li, Kai[2];Wang, Qiaoling[2];Fu, Enyu[2];Guo, Xuhong[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Shanghai Univ Engn Sci, Coll Chem & Chem Engn, Shanghai 201620, Peoples R China

年份：2019

卷号：11

期号：5

外文期刊名：POLYMERS

收录：;EI(收录号：20192206992900);WOS:【SCI-EXPANDED(收录号:WOS:000480531700071)】；

基金：This research was funded by the National Natural Science Foundation of China (grant number: 21504052, 5171101370).

语种：英文

外文关键词：hairy nanoparticles; pickering emulsion; photoemulsion polymerization

摘要：Pickering emulsions are increasingly applied in drug delivery, oil-water separation, composite materials preparation, and other fields. However, systematic studies on the stabilization of Pickering emulsions to satisfy the growing application demands in multiple fields with long-term conservation are rare. Compared to conventional solid nanoparticles, polyanion-modified hairy nanoparticles are more stable in practical environments and are investigated in this study. Poly (sodium p-styrenesulfonate) was grafted to a polystyrene (PS) core via a photoemulsion polymerization. A hairy nanoparticle bearing polyanions called poly (sodium p-styrenesulfonate) brush (PS@PSS) was synthesized. The size and uniformity of the Pickering emulsions stabilized by PS@PSS were investigated via a polarizing microscope. The stability of Pickering emulsions were optimized by adjusting critical factors like ultrasonic power and time, standing time, oil phases, salt concentration, and water:oil ratio. Results indicated that the Pickering emulsions could be stabilized by PS@PSS nanoparticles, which showed remarkable and adjustable partial wetting properties. It was found that the optimized conditions were ultrasonic power of 150 W, ultrasonic time of 3 min, salt concentration of 0.1 mM, oil phase of hexadecane, and water:oil ratio of 1:1. The formation and stability of Pickering emulsion are closely related to the hairy poly (sodium p-styrenesulfonate) brush layer on the nanoparticle surface.