用流变学方法研究铝离子存在时阴离子表面活性剂胶束的生长和结构(英文)

Micellar Growth and Structure in the Presence of Al^(3+) Counterions Studied by Rheology

表面活性剂溶液的流变行为是影响表面活性剂应用的重要因素之一。用流变学方法 ,通过测定溶液在不同浓度和温度时的剪切粘度和应力研究了铝离子存在时阴离子表面活性剂十二烷基聚氧乙烯 (3)硫酸钠 (AES)胶束的生长和结构。结果表明 ,升高表面活性剂和盐的浓度或降低温度都可以促进胶束的生长 ,并且形成虫状胶束和网络结构 ;溶液的流变行为不符合Maxwell模型 。

WT5”BZ]:Aqueous solutions of ionic surfactants with strongly binding counterions exhibit wormlike or network properties. The properties of anionic micelles of sodium dodecyl trioxyethylene sulfate in the presence of multivalent counterion Al 3+ were investigated by means of rheological methods. We examine the steady-shear viscosity, the zero-shear viscosity, and the shear stress as a function of the surfactant and salt concentrations and the temperature. Some interesting results have been obtained to express the micellar growth and structure. The formation of wormlike micelle or network structure in surfactant solutions becomes easier and easier when increasing the surfactant and salt concentration or decreasing the temperature. The nonlinear viscoelasticity and non-Newtonian liquid can be found in all solutions according to the comparison with the simple Maxwell Model.