日用化学工业（中英文）2023，Vol.53Issue(12)：1361-1368,8.DOI:10.3969/j.issn.2097-2806.2023.12.001
新型拟双子表面活性剂构筑的蠕虫状胶束及其pH和温度响应行为
Temperature and pH responsive behavior of wormlike micelles formed by novel pseudo-gemini surfactant
摘要
Abstract
Three pseudo-gemini surfactants(2C18N3N/XA,XA=SA,GA and AA)were formed by non-covalently connecting dibasic acid(HOOC(CH2)n COOH,n=2,3 and 4,abbreviated as SA,GA and AA,respectively)with long-chain tertiary amine(C17H35CONHCH2CH2CH2N(CH3)2)in the molar ratio of 1∶2 through electrostatic interactions.The whole process had avoided any complicated synthetic procedures.The surface activity and rheological properties of the surfactants were investigated.The critical micelle concentration(cmc)of 2C18N3N/GA was 4.60×10-5 mmol/L,which was significantly lower than that of conventional gemini surfactants,indicative of strong aggregation ability.2C18N3N/SA and 2C18N3N/AA also had low cmc values.These surfactants could form wormlike micelles when the concentrations were above 50 mmol/L,exhibiting viscoelastic behavior,and the viscoelastic solutions thereof had good temperature and shear resistance.Due to the tertiary amine group in the pseudo-gemini surfactant,it exhibited pH-responsive properties.It was found that when the pH was 6.1,the viscosity of the solution was very high,whereas when the pH was 4.0 or 9.3,the viscosity rapidly decreased.Furthermore,the pseudo-gemini surfactant was also responsive to temperature.With the increase of temperature,the viscosity of the system rapidly increased.At 60℃,the zero-shear viscosity of 2C18N3N/GA at 300 mmol/L could be as high as 11 967.73 Pa·s.These surfactants were simple to be prepared and showed excellent performance,which expanded the range of preparation and application of novel surfactants.关键词
双子表面活性剂/蠕虫状胶束/黏弹性/pH响应/温度响应Key words
gemini surfactant/wormlike micelle/viscoelasticity/pH-responsive/temperature-responsive分类
化学化工引用本文复制引用
潘婷,吴俊辉,裴晓梅,崔正刚..新型拟双子表面活性剂构筑的蠕虫状胶束及其pH和温度响应行为[J].日用化学工业（中英文）,2023,53(12):1361-1368,8.基金项目
国家自然科学基金资助项目(22272063) （22272063）
