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化学学报
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化学学报 ›› 2001, Vol. 59 ›› Issue (9): 1384-1388. 上一篇    下一篇

研究论文

十二烷基聚氧乙烯硫酸钠胶束体系的流变性质研究

牟建海;李干佐;陈文君;毛宏志;刘少杰   

  1. 山东大学胶体与界面化学教育部重点实验室
  • 发布日期:2001-09-15

Rheological properties of aqueous micellar solutions of sodium dodecyltrioxyethylene sulfate

Mu Jianhai;Li Ganzuo;Chen Wenjun;Mao Hongzhi;Liu Shaojie   

  • Published:2001-09-15

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517

被引次数

1

用流变学方法研究了无机电解质KBr存在时，阴离子表面活性剂十二烷基聚氧乙烯(3)硫酸钠(SDES)水溶液中胶束的生长和结构。通过测量体系的稳态剪切粘度(η)和应力(σ)关系，得到零剪切粘度(η0)、复合粘度(|η^*|)、动态模量[储能模量(G')和损耗模量(G")、平台模量(G0)、结构松驰时间(τ)等流变学参数，并应用Cox-Merz规则和Cole-Cole图，发现在SDES/KBr体系中可以形成蠕虫状胶束网络结构，体系为假塑性流体，偏离Maxwell模型，具有非线性粘弹性，没有单一的结构松驰时间。

关键词: 流变性能, 十二烷基聚氧乙烯硫酸钠, 粘弹性, 胶束

The growth and structure of anionic micelles of sodium dodecyl trioxyethylene sulfate (SDES) in the presence of electrolyte KBr have investigated by means of the rheological methods. It is fully proved that wormlike micelle and network structure can be formed in SDES/KBr aqueous micellar solutions, according to the measurements of the relation of steady shear viscosity η and stress σ, and the parameters of zero-shear viscosity η0, complex viscosity | η^*|, dynamic moduli (storage modulus G' and loss modulus G") etc. , and the application of Cox-Merz rule and Cole-Cole plot. The plateau modulus G0 and the relaxation time τare also used to express the rheological properties of the wormlike micellar solution. The structure is a character of non-linear viscoelastic fluid and departure from the simple Maxwell model.

Key words: RHEOLOGICAL PROPERTY, VISCOELASTICITY, MICELLE

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