表面活性剂液膜的稳定性研究  

STUDY ON THE STABILITY OF THE LIQUID SURFACTANT MEMBRANE

作　　者：康万利[1] 李凤兰[1] 韩济亮 刘沛妍[1] 严忠[1] 

机构地区：[1]大庆石油学院石油工程系,大庆职工大学,东北师范大学

出　　处：《大庆石油学院学报》1996年第1期6-9,共4页Journal of Daqing Petroleum Institute

基　　金：国家自然科学基金

摘　　要：通过电容的测定，求得水中３种表面活性剂液膜的厚度。从微观上研究了液膜的稳定原因。根据自由膜的薄化曲线，探讨了Ｓｐａｎ８０，ＥＣＡ４３６Ｊ和ＥＭ３０１等３种不同表面活性剂液膜的稳定性。在电场中，ＥＣＡ４３６０Ｊ和ＥＭ３０１膜的进一步薄化表明，液膜的３层模型是合理的。实验结果表明，临界膜厚或双分子膜厚取决于表面活性剂分子的链长。液膜的稳定性取决于表面活性剂分子间的作用力。ＥＣＡ４３６０Ｊ和ＥＭ３０１膜的电破裂能数据可定量解释液膜的稳定性。３０种表面活性剂液膜的稳定性能很好地解释实际乳状液的稳定性和溶胀规律。The thickness of three surfactant liquid membranes in aqueous medium was measured.The stabilization of the liquid membranes by different surfactants as Span80,ECA4360J and EM301 was discussed according to their thinning curves of free membrane in a 0.1 M NaCl solution.The further thinning of the membrane of ECA4360J and EM301 in electric field indicated that the stratified model of a liquid membrane is rational.The experiment results suggested that the chain length of the surfactant molecule determines the critical membrane thickness,the bilayer membrane thickness and the interactions of the surfactant molecules depend on the membrane;stability.The electric rupture energy of the membranes for ECA4360J and EM301 was also estimated to give a qualitative explanation of the stability of their liquid membranes.The stability of the three surfactant membranes can explain the stability and the swelling sequences of the emulsions(w/o)made from them.

关 键 词：液膜 临界膜厚 双分子膜厚 电破裂能 表面活性剂 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]