添加盐对Gemini阳离子表面活性剂溶液的影响

doi:10.13218/j.cnki.csdc.2016.10.001

摘要/Abstract

摘要： 通过流变学方法研究了水杨酸钠(NaSal)对Gemini阳离子表面活性剂2-羟亚丙基-1,3-双(二甲基十二烷基氯化铵)(以12-3(OH)-12(2Cl)表示)水溶液黏弹性能的影响。结果发现,无机盐诱导12-3(OH)-12(2Cl)产生盐析作用,而NaSal可促使胶束生长;在固定n(NaSal)/n(12-3(OH)-12(2Cl))=0.6,12-3(OH)-12(2Cl)质量摩尔浓度较低时,溶液的黏度很小;随12-3(OH)-12(2Cl)质量摩尔浓度增加,溶液黏度明显增大并显示Maxwell流体行为;溶液的零剪切黏度(η₀)随12-3(OH)-12(2Cl)质量摩尔浓度增加有一个最大值出现,是因为体系中12-3(OH)-12(2Cl)的阳离子和水杨酸根(Sal^-)反离子形成的氢键使棒状胶束之间相互连接,导致网络结构形成;测定的晶体结构验证了分子间氢键的形成。

关键词: Gemini阳离子表面活性剂, 流变行为, 分子间氢键, 蠕虫状胶束

Abstract: Effect of addition of sodium salicylate (NaSal) on viscoelastic performance of aqueous solution of Gemini cationic surfactant 2-hydroxy propylidene-1,3-bis(dimethyldodecylammonium chloride) (hereinafter refer to as 12-3(OH)-12(2Cl)) was studied with rheological measurement.Results showed that the addition of an inorganic salt induces salting out of the 12-3(OH)-12(2Cl),while NaSal promotes micellar growth.At a fixed NaSal-to-surfactant molar ratio of 0.6,viscosity of the solution is very small at a rather low concentration of 12-3(OH)-12(2Cl).Upon increasing the concentration,viscosity of the solution rises conspicuously and shows Maxwell fluid behavior.Following the increase of concentration of 12-3(OH)-12(2Cl),a maximum value of zero-shear viscosity (η₀) appears.These trends can be attributed to the formation of a network structure between the cationic ions of 12-3(OH)-12(2Cl) and Sal^- counter ion as the 12-3(OH)-12(2Cl) concentration increases.Crystal analysis further confirms the presence of structures linked by intermolecular hydrogen bonds.

Key words: Gemini cationic surfactant, rheological behavior, intermolecular hydrogen bond, wormlike micelle

中图分类号:

TQ423.12

陈肖肖,郭严,韩传红,张军红,周士岩,魏西莲. 添加盐对Gemini阳离子表面活性剂溶液的影响[J]. 日用化学工业, 2016, 46(10): 549-554.

CHEN Xiao-xiao,GUO Yan,HAN Chuan-hong,ZHANG Jun-hong,ZHOU Shi-yan,WEI Xi-lian. Effect of addition of salt on solution of Gemini cationic surfactant[J]. China Surfactant Detergent & Cosmetics, 2016, 46(10): 549-554.

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