糖苷类表面活性剂与双癸基二甲基氯化铵复配体系的物化性能及相行为

Physicochemical Properties and Phase Behavior of Mixed Systems Containing Glycoside-based Surfactant and Didecyldimethylammonium Chloride

研究了糖苷类表面活性剂C8/10烷基糖苷(APG)、C12/14醇醚糖苷(AEG)和C12/14醇醚糖苷柠檬酸单酯二钠盐(AEG-EC)与双癸基二甲基氯化铵(DDAC)复配体系的物化性能和相行为。结果表明,APG/DDAC体系的表面张力、泡沫性能和乳化性能有增效作用,润湿性能无增效作用。AEG/DDAC体系的泡沫性能和乳化性能有增效作用,润湿性能无增效作用。AEG-EC/DDAC体系的表面张力和润湿性能有增效作用,泡沫性能无增效作用。用偏光显微镜研究了三元体系的相行为,结果表明,随着DDAC含量的增加,糖苷类表面活性剂/DDAC/水体系的三元相图依次出现胶束相、胶束-液晶共存相和层状液晶相。

The properties and phase behavior of different glycoside-based surfactant/didecyldimethyl ammonium chloride （DDAC） mixtures have been investigated. The three glycoside-based surfactants are deeyl glycoside （APG）, dodecyl ethoxy glycoside （AEG） and disodium dodecyl ethoxy glycoside citrate （AEG-EC）. For APG/DDAC, synergism was observed in surface tension, foaming and emulsifying properties, not in wetting ability. For AEG/DDAC, synergism was observed in foaming and emulsifying properties, while the wetting ability exhibited no such effect. The surface tension and wetting ability of AEG-EC/DDAC mixed systems showed synergism, while the foaming property not. Phase behavior of the glycoside-based surfactant/DDAC/water ternary system has also been carried out by polarized optical microscope. The phase diagrams are characterized by a micellar phase, a region of coexistence of lamellar and micellar phases and a lamellar phase.