日用化学工业（中英文）2024，Vol.54Issue(1)：1-15,15.DOI:10.3969/j.issn.2097-2806.2024.01.001
非离子-阴离子Bola型表面活性剂和纳米SiO2颗粒协同稳定的双重响应型O/W乳状液
Dual-responsive oil-in-water emulsions co-stabilized by a nonionic-anionic Bola surfactant and silica nanoparticles
摘要
Abstract
A smart nonionic-anionic Bola surfactant was synthesized which could be switched between nonionic form CH3O(EO)5-R11-COOH(pH<p Ka= 6.6)and Bola form CH3O(EO)5-R11-COONa(pH>p Ka)as triggered by pH.Individually,the nonionic/Bola forms behaved as poor/good emulsifiers,respectively.When the nonionic form was mixed with silica nanoparticles,they could co-stabilize n-decane-in-water Pickering emulsions,where the silica nanoparticles were hydrophobized in situ to be surface-active by adsorption of the surfactant via hydrogen bonding.The Pickering emulsions could be switched between stable and unstable statuses many times as triggered by either pH or temperature.On the other hand,the Bola form could co-stabilize oil-in-dispersion emulsions with silica nanoparticles,which were resistant to heating but were sensitive to the salt formed during pH alternation.However,in contrast to the CH3(EO)7-R11-COONa which could completely transfer to aqueous phase after demulsification,its analogue with shorter EO chain,i.e.,CH3(EO)5-R11-COONa,was still partially oil-soluble either in nonionic form or in bola form,suggesting a significant effect of EO number on the performance of these novel smart surfactants.关键词
非离子-阴离子Bola型表面活性剂/纳米SiO2颗粒/Pickering乳状液/pH-响应/温度-响应Key words
nonionic-anionic Bola surfactant/silica nanoparticle/Pickering emulsion/pH-responsive/temperature-responsive分类
化学工程引用本文复制引用
刘佩,潘婷,裴晓梅,宋冰蕾,蒋建中,崔正刚,Bernard P. Binks..非离子-阴离子Bola型表面活性剂和纳米SiO2颗粒协同稳定的双重响应型O/W乳状液[J].日用化学工业（中英文）,2024,54(1):1-15,15.基金项目
国家自然科学基金资助项目(22272063,21872064) （22272063,21872064）
高等学校学科创新引智计划(B13025) （B13025）
