椰油酰甘氨酸类表面活性剂复配体系相行为研究

doi:10.3969/j.issn.2097-2806.2025.07.006

摘要/Abstract

摘要：

针对椰油酰甘氨酸钠（SCG）和椰油酰甘氨酸钾（GCK）单一体系，以及SCG/GCK、SCG/GCK/椰油酰胺丙基羟磺基甜菜碱（CHSB）复配体系在pH=6.5下的相行为进行研究。二元相图研究结果表明，GCK的溶解温度显著低于SCG，溶解区域显著大于SCG；当SCG/GCK以质量比1:1复配时，复配体系的相行为与GCK体系类似，说明GCK的加入对SCG的溶解性有提升作用。三元相图研究结果显示，CHSB的加入使未溶解区域进一步减小，并丰富了体系相态，SCG/GCK/CHSB体系呈现球形、棒状、蠕虫状和六角相胶束相态变化，并以棒状胶束和蠕虫状胶束为主。对椰油酰甘氨酸类表面活性剂自组装行为进行深入研究，为开发新型氨基酸类洗护产品提供了理论支持。

关键词: 椰油酰甘氨酸钠, 椰油酰甘氨酸钾, 复配体系, 相行为

Abstract:

The phase behaviors of single systems of sodium cocoyl glycinate （SCG） and potassium cocoyl glycinate （GCK）, as well as the mixed systems of SCG/GCK and SCG/GCK/cocamidopropyl hydroxysultaine （CHSB）, were investigated at pH 6.5. The results of binary phase diagram showed that the Krafft temperature of GCK was significantly lower than that of SCG, and the micellar region for GCK was considerably larger than SCG. When SCG and GCK were mixed at a mass ratio of 1:1, the phase behavior of the mixed system was similar to that of single GCK, indicating that the addition of GCK had improved the solubility of SCG. The results of ternary phase diagram showed that the addition of CHSB made the phase behavior of the mixed system more diverse. The addition of CHSB resulted in a further shrink of the undissolved region. There were regions of spherical, rod-like, worm-like and hexagonal micellar phases in the phase diagram of mixed system of SCG/GCK/CHSB. An in-depth study on the self-assembly behavior of cocoyl glycinate surfactants could provide theoretical support for the development of new amino acid-based cleansing and care products.

Key words: sodium cocoyl glycinate, potassium cocoyl glycinate, mixed system, phase behavior

中图分类号:

TQ423

段鑫, 张雅楠, 高佳佳, 张婉萍, 张倩洁. 椰油酰甘氨酸类表面活性剂复配体系相行为研究[J]. 日用化学工业（中英文）, 2025, 55(7): 861-870.

Xin Duan, Yanan Zhang, Jiajia Gao, Wanping Zhang, Qianjie Zhang. Study on the phase behavior of mixed systems of cocoyl glycinate surfactants[J]. China Surfactant Detergent & Cosmetics, 2025, 55(7): 861-870.

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