文献类型：期刊文献

英文题名：Pickering emulsion-templated polymers: insights into the relationship between surfactant and interconnecting pores

作者：Zhu, Wenxiao[1];Zhu, Yun[1];Zhou, Ce[1];Zhang, Shengmiao[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China

年份：2019

卷号：9

期号：33

起止页码：18909

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20192707132602);WOS:【SCI-EXPANDED(收录号:WOS:000473058600024)】；

基金：This work was supported by the National Natural Science Fund of China (51773059), Natural Science Foundation of Shanghai (16ZR1407800), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Emulsification - Drops - Ostwald ripening - Emulsions - Phase interfaces

摘要：Pickering high internal phase emulsions (HIPEs) using micron-size polymeric particles as stabilizer were developed. By adding a small amount of surfactant to the Pickering HIPEs, macroporous polymers with a well-define open-cell structure were synthesized with these HIPEs as templates. Owing to the micron-size of the particles, the particle locations could be observed directly by laser scanning confocal microscopy. It was found that the excess and attached particles aggregated and formed thick particle layers around the droplets when the HIPE was stabilized solely by particles. These thick particle layers were extremely stable, and did not easily rupture during or after polymerization, which caused the resulting polymers to have a closed-cell structure. When a small amount of surfactant was added, it was found that the surfactant disaggregated the particles, leaving them well-dispersed in the continuous phase. Moreover, the surfactant tended to occupy the oil-water interface at the contact point of adjacent droplets, where the interconnecting pores were hence likely to be formed after consolidation of the continuous phase. This observation confirmed experimentally the mechanism of interconnecting pore formation in Pickering-HIPE-templated porous polymers proposed theoretically in previous works.