离子液体表面活性剂的合成与应用(Ⅴ)——离子液体表面活性剂的聚集热力学和状态

doi:10.13218/j.cnki.csdc.2017.05.003

摘要/Abstract

摘要： 离子液体表面活性剂聚集形成胶束的ΔG⁰、ΔH⁰和ΔS⁰数据表明,聚集过程为熵驱动;离子液体表面活性剂的聚集数与传统表面活性剂相似,一般在40~160之间,其表观流体力学直径(D_h)为数纳米,高浓度形成囊泡时D_h可达100 nm;胶束表面反离子电离度在0.15~0.6之间;离子液体表面活性剂在水和有机溶剂中的聚集状态有差异,在水中的聚集状态与传统表面活性剂相似。

关键词: 表面活性剂, 离子液体, 胶束, 热力学, 聚集行为

Abstract: Aggregation of ionic liquid surfactants in aqueous solution is an entropy driven process,according to the data of its ΔG⁰,ΔH⁰ and ΔS⁰.Aggregation number of ionic liquid surfactants is similar to that of traditional surfactants,40-160 in general.The apparent hydrodynamic diameter (D_h) of surfactant aggregation is several nanometers;but in case the concentration of the ionic liquid surfactant is high as forming vesicles,D_h may achieve 100 nm.Ionization degree of counter ions at the surface of surfactant micelles is about 0.15-0.6.Aggregation behavior of ionic liquid surfactants in water is similar to that of traditional surfactant,but the aggregation behavior of ionic liquid surfactants in water is different with that in organic solvents.

Key words: surfactant, ionic liquid, micelle, thermodynamics, aggregation behavior

中图分类号:

TQ423

邹文苑, 杨许召, 徐清杰, 王萍, 王军. 离子液体表面活性剂的合成与应用(Ⅴ)——离子液体表面活性剂的聚集热力学和状态[J]. 日用化学工业, 2017, 47(5): 251-256.

ZOU Wen-yuan, YANG Xu-zhao, XU Qing-jie, WANG Ping, WANG Jun. Synthesis and application of ionic liquid surfactants (Ⅴ)Thermodynamics and behavior of surfactant aggregation[J]. China Surfactant Detergent & Cosmetics, 2017, 47(5): 251-256.

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