N-酰基氨基酸型表面活性剂与离子液体表面活性剂复配体系流变性研究  

Rheology of the mixed aqueous systems of N-acyl amino acid surfactant and ionic liquid surfactant

作　　者：惠蒙蒙 白亚榕 杨许召 张晨龙 王军 HUI Meng-meng;BAI Ya-rong;YANG Xu-zhao;ZHANG Chen-long;WANG Jun(Zhengzhou University of Light Industry,Zhengzhou,Henan 450002,China)

机构地区：[1]郑州轻工业大学,河南郑州450002

出　　处：《日用化学工业》2020年第10期681-686,共6页China Surfactant Detergent & Cosmetics

基　　金：“十二五”国家科技支撑计划资助项目(2013BAC01B04);河南省科技攻关项目(162102210056)。

摘　　要：通过表面张力和流变性的测定研究了离子液体表面活性剂1-十四烷基-3-甲基咪唑溴盐([C_(14)Mim][Br])与月桂酰基肌氨酸钠(SLS)、月桂酰基谷氨酸钠(SLGLU)和月桂酰基甘氨酸钠(SLG) 3种N-酰基氨基酸型表面活性剂之间的相互作用和不同复配比例时混合体系的流变特征。除SLG外,SLS和SLGLU与不同摩尔分数(x)的[C_(14)Mim][Br]具有良好的复配稳定性。SLS、SLGLU分别与[C_(14)Mim][Br]复配后降低水溶液表面张力能力具有协同增效作用,SLGLU与[C_(14)Mim][Br]的协同增效作用大于SLS与[C_(14)Mim][Br],其最佳复配x分别为0.7和0.5。SLS与[C_(14)Mim][Br]和SLGLU与[C_(14)Mim][Br]两种混合体系在大部分复配比例时都没有触变环,只有x=0.4~0.5的SLS+[C_(14)Mim][Br]混合溶液和x=0.7的SLGLU+[C_(14)Mim][Br]混合溶液呈现了触变环。两种复配体系都具有剪切变稀的特点,这可能与复配体系中形成了囊泡有关。除了x=0.5的SLS+[C_(14)Mim][Br]混合溶液外,这两种复配体系的黏度基本不随剪切时间而改变,具有良好的耐剪切性。The interactions between an ionic liquid surfactant(1-tetradecyl-3-methylimidazolium bromine,[C14Mim][Br])and three N-acyl amino acid surfactants(sodium lauroyl sarcosinate(SLS),sodium lauroyl glutamate(SLGLU)and sodium lauroyl glycinate(SLG)),and the rheology of the mixed aqueous systems of[C14Mim][Br]/SLS and[C14Mim][Br]/SLGLU with different mole fractions(x)of[C14Mim][Br]were studied by the determination of surface tension and rheology.Except SLG,the N-acyl amino acid surfactants under investigation showed a good formulation stability when mixed with[C14Mim][Br].The surface tension of mixed solutions of[C14Mim][Br]/SLS and[C14Mim][Br]/SLGLU were both indicative of synergistic effect.The synergistic effect between[C14Mim][Br]and SLGLU was larger than that between[C14Mim][Br]and SLS,and the optimum x were 0.7 and 0.5,respectively.When a series of aqueous solutions of[C14Mim][Br]/SLS and[C14Mim][Br]/SLGLU were tested by thixotropy,there was no thixotropic loop for the mixed solutions except the solutions of[C14Mim][Br]/SLS at x=0.4-0.5 and the solution of[C14Mim][Br]/SLGLU at x=0.7.The two series of aqueous solutions showed the characteristics of shear thinning,which might be related to the formation of vesicles in the mixed systems.Except for the mixed solution of[C14Mim][Br]/SLS at x=0.5,no significant change was observed in the viscosity of the two mixed systems with shear time,indicative of good shear resistance.

关 键 词：表面活性剂 离子液体 氨基酸 相互作用 流变性 

分 类 号：TQ423[化学工程]