物理化学学报2017，Vol.33Issue(6)：1205-1213,9.DOI:10.3866/PKU.WHXB201702222
含硒磺基甜菜碱表面活性剂界面性能的氧化-还原响应行为
Redox-Responsive Interfacial Properties of Se-Containing Sulfobetaine Surfactant
摘要
Abstract
The use of Se atom as the redox-responsive group has aroused considerable attention because of its good biocompatibility.However,only a few efforts have been devoted to Se-containing surfactants,especially for smart control of interfacial properties.This paper focuses on the redox-responsive behaviors,such as molecular structure,Krafft temperature,surfacelinterfacial tension,foaming,and emulsification of the Se-containing zwitterionic surfactant,3-(11-benzylselanyl-undecyl)-dimethyl ammonium propane sulfonate (BSeUSB).After oxidization with a trace of H2O2 (-≤ 0.056％ of total mass),the reduced form BSeUSB with one hydrophilic head and one hydrophobic tail-transformed to the Bola-type oxidized form BSeUSB-Ox due to the presence of a new hydrophilic group (selenoxide).Therefore,Krafft temperature decreased from (23.5 + 0.5) ℃ to less than 0 ℃.The surface/interfacialtension values at 5.00 mmol·L-1 increased from 45.15,5.52 mN·m-1 to 61.63,18.38 mN·m-1,respectively.Macroscopically,BSeUSB has good foaming and emulsification properties,while foaming aemulsification abilities ol BSeUSB-Ox were almost non-existent.Interestingly,the initial molecular structure and the solution properties of BSeUSB were regained after reduction with a trace of Na2SO3 (≤ 0.060％ of total mass).Thus,by the addition of trace amounts of H2O2 and Na2SO3 alternately,we have achieved smart control of the interfacial properties of the surfactant.关键词
氧化-还原响应/含硒表面活性剂/甜菜碱/界面性能/泡沫/乳液Key words
Redox-responsive/Se-containing surfactant/Betaine/Interfacial property/Foam/Emulsion分类
化学化工引用本文复制引用
孔伟伟,郭爽,张永民,刘雪锋..含硒磺基甜菜碱表面活性剂界面性能的氧化-还原响应行为[J].物理化学学报,2017,33(6):1205-1213,9.基金项目
The project was supported by the National Natural Science Foundation of China (21503094,21673103),MOE& SAFEA for the 111 Project (B13025),Fundamental Research Funds for the Central Universities,China (JUSRP 51507),Natural Science Foundation of Jiangsu Province,China (BK20150128) and Qinglan Project of Jiangsu Province,China.国家自然科学基金(21503094,21673103),111引智计划“功能分子、聚集体及器件创制创新引智基地(B13025)”,江苏省自然科学基金(BK20150128)及江苏省青蓝工程资助 （21503094,21673103）
