Microstructure “lock-in” of wormlike micelles in aqueous cationic trimer surfactant systems

MU Ruihua; WU Wenhui

doi:10.3969/j.issn.0438-1157.2013.09.031

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Microstructure “lock-in” of wormlike micelles in aqueous cationic trimer surfactant systems

更新时间：2025-12-10

- Microstructure “lock-in” of wormlike micelles in aqueous cationic trimer surfactant systems
- CIESC Journal Issue 9, Pages: 3301-3307(2013)
- 作者机构：
  
  北京理工大学材料学院,北京,100081
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.09.031
  CLC： E357.2
- Online First：05 September 2013，
  
  Published：05 September 2013
- 稿件说明：
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MU Ruihua, WU Wenhui. Microstructure “lock-in” of wormlike micelles in aqueous cationic trimer surfactant systems[J]. CIESC Journal, 2013, (9): 3301-3307.
DOI：

MU Ruihua, WU Wenhui. Microstructure “lock-in” of wormlike micelles in aqueous cationic trimer surfactant systems[J]. CIESC Journal, 2013, (9): 3301-3307. DOI： 10.3969/j.issn.0438-1157.2013.09.031.

摘要

以三联阳离子表面活性剂双(2-羟基-二亚甲基醚)-α

γ-三(十六烷基二甲基氯化铵)(16-4(OH)-16-4(OH)-16)在水杨酸钠(NaSal)及氯化钠(NaCl)作用下形成的蠕虫状胶束为研究对象

向该体系中增溶苯乙烯(St)引发聚合

探讨了聚合前后胶束溶液的流变性能。通过表观黏度法研究了16-4(OH)-16-4(OH)-16/NaSal/NaCl及十六烷基三甲基溴化铵(CTAB)/NaSal两种体系聚合后溶液的耐温(T)及耐剪切性

并利用流变测试对16-4(OH)-16-4(OH)-16/NaSal/NaCl体系增溶St聚合前后溶液性能进行了表征。结果表明:CTAB/NaSal胶束体系中St最佳增溶量为0.05 g

T=100℃或剪切90 min

聚合后溶液表观黏度(ηa)分别为66.9、15.5 mPa·s;而16-4(OH)-16-4(OH)-16/NaSal/NaCl胶束中St 最佳增溶量为0.10 g

T=100℃且连续剪切90 min后

聚合后溶液的ηa 始终维持在99.1 mPa·s

该体系聚合后稳态模量(G0)高于未增溶St体系

由此说明蠕虫状胶束内St聚合物链可以产生对其微结构的“lock-in”效应。

Abstract

Wormlike micelles(WLMs)were formed in aqueous solutions of cationic trimer surfactant di(2-hydroxyl-dimethylene ether)-α

γ-triple(dimethylcetylammonium chlorine)

referred to as 16-4(OH)-16-4(OH)-16 by addition of sodium salicylate(NaSal)and sodium chloride(NaCl).The rheological properties of the micellar solution before and after polymerization were discussed by solubilizing styrene(St)into the cores of WLMs.The temperature(T)and shear resistance of systems of 16-4(OH)-16-4(OH)-16/NaSal/NaCl and cetyl trimethyl ammonium bromide(CTAB)/NaSal were compared with the viscosimetry method

and the properties of 16-4(OH)-16-4(OH)-16/NaSal/NaCl solutions before and after polymerization were characterized with the rheology method.The results showed that the optimum solubilization quantity of St for the CTAB/NaSal system was 0.05 g

and at 100℃ or after shearing 90 min

the ηa of its polymerization system was 66.9 mPa·s and 15.5 mPa·s

respectively.For the 16-4(OH)-16-4(OH)-16/NaSal/NaCl system

the best solubilization quantity of St was 0.10 g;the ηa of its polymerization system was 99.1 mPa·s after shearing 90 min incessantly at 100℃;the plateau modulus(G0)of the polymerization system was higher than that of the solutions without St.Based on the above discussion

the "lock-in" of the microstructure of wormlike micelles formed by 16-4(OH)-16-4(OH)-16 with NaSal and NaCl can be realized by polymerization of St in the hydrophobic core of the micelles.

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