两性与氨基酸型阴离子表面活性剂形成自增稠体系的性质研究

doi:10.13218/j.cnki.csdc.2015.01.003

摘要/Abstract

摘要： 通过调节质量比和pH,获得了由两性表面活性剂椰油酰胺丙基甜菜碱(CAPB)和氨基酸型阴离子表面活性剂月桂酰基肌氨酸钠(LS)复配的黏弹性胶束体系(自增稠体系)。通过低温冷冻透射电镜(Cryo-TEM)表征,确认了蠕虫状胶束结构。分析了NaCl含量对体系黏度的影响;着重考察了黏弹性体系的黏温性和发泡性。结果表明,NaCl含量(w<0.5%时)对该体系黏度影响较小,体系黏度的建立主要来自于质量比和体系pH;该体系在高温(40 ℃)时黏度降低,在低温(5 ℃)时黏度升高;当pH降低时,体系发泡性能变差。利用调节质量比和pH的方法,同时也能获得一系列氨基酸型阴离子表面活性剂和两性表面活性剂复配形成的自增稠体系,该方法具有一定的通用性。

关键词: 表面活性剂, 复配, 自增稠, 蠕虫状胶束, 黏温性, 发泡性

Abstract: A viscoelastic micelle system (self-thickening system) blended with an amphoteric surfactant,cocamidopropyl betaine (CAPB),and an amino-acid based anionic surfactant,sodium lauroyl sarcosinate (LS),was formed by adjusting the mass ratio and pH.The network of wormlike micelles in the blend was confirmed via characterization with Cryo-TEM images.Effect of NaCl dosage on the viscosity of the self-thickening system was identified and the viscosity-temperature characteristics as well as the foaming performance of the viscoelastic system were emphatically investigated.Results showed that when the NaCl content is low (w<0.5%) its effect on viscosity of the system is rather small.Establishment of viscosity of the system is mainly affected by mass ratio and pH of the system.The viscosity decreases at higher temperature (40 ℃) and increases at lower temperature (5 ℃),respectively.The foaming performance becomes worse as pH declines.Adopting the methods of adjusting the mass ratio and the pH,a series of self-thickening systems formed by blending of anionic amino-acid based anionic surfactant and amphoteric surfactant can be obtained.

Key words: surfactant, blend, self-thickening, wormlike micelles, viscosity-temperature characteristics, foam performance

中图分类号:

TQ423

袁旻嘉, 董超, 沈珮琳, 卢海伟, 王进爽, 方波, 郭奕光. 两性与氨基酸型阴离子表面活性剂形成自增稠体系的性质研究[J]. 日用化学工业, 2015, 45(1): 11-16.

YUAN Min-jia, DONG Chao, SHEN Pei-lin, LU Hai-wei, WANG Jin-shuang, FANG Bo, GUO Yi-guang. Study on properties of self-thickening system composed of amphoteric surfactant and amino-acid based anionic surfactant[J]. China Surfactant Detergent & Cosmetics, 2015, 45(1): 11-16.

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