油烷基Gemini表面活性剂的流变性能研究

The Rheological Properties of a Gemini Surfactant with Oleyl Chains

以天然产物油酸为主要原料,制备了短联接链的油烷基Gemini表面活性剂并研究了其流变性能。该表面活性剂在较低浓度,无外加盐的条件下即可形成蠕虫状胶团,表现出明显的黏弹行为。由于胶束结构的变化,溶液的零剪切黏度随着浓度的升高先增加后下降,最大值为8 022.7 mPa.s出现在50 mmol/L左右。

Taking the natural product oleic acid as the main material, the Gemini surfactant with a short spacer and oleyl chains was synthesized and its rheological property was explored. Wormlike micelles can be formed without addition of salt. The solution showed obvious visco-elastic properties. The zero-shear viscosity was firstly increased and then decreased with the increase of concentration. Because of the transformation of micellar structures, a maximum value of 8 022. 7 mPa ＇s was reached at about 50 mmol/L.