摘要
采用TX-500型旋转滴界面张力仪和CHI900电化学工作站进行测试,研究了乙醇对烷基苯磺酸盐Gemini表面活性剂Ia水溶液性质的影响。结果发现:乙醇的加入可以使溶液体系中Ia的临界胶束浓度增大,溶液的界面张力值和Ia的胶束扩散系数降低。原因可能是因为乙醇的两亲结构可以使其通过疏水效应插入到表面活性剂之间,减小Ia分子间的距离,使Ia分子更好地分散在溶液中,更加紧密、有规律地排列在界面上,最终降低溶液体系的界面张力;但乙醇的存在对于Ia分子的聚合是不利的,不利于Ia胶束的形成,所以乙醇的加入使Ia分子的临界胶束浓度增大,Ia分子胶束尺寸变大,从而表现出较小的胶束扩散系数。
In this paper,the effect of ethanol on the aqueous solution properties of alkylbenzene sulfonate Gemini surfactant Ia is studied with a TX-500 rotating droplet interfacial tension meter and a CHI900 electrochemical workstation.The results show that the addition of ethanol can increase the critical micelle concentration of Ia in the solution system,and decrease the interfacial tension value of the solution and the micelle diffusion coefficient of Ia.This is likely because that the amphiphilic structure of ethanol can be inserted between surfactants through hydrophobic effects,reduce the distance between Ia molecules,lead to their better dispersion in the solution and a more orderly arrangement at the interface,and ultimately reduce the interfacial tension of the solution system;However,the presence of ethanol is disadvantageous to the aggregation of Ia molecules and the formation of Ia micelles,resulting in an increase in the critical micelle concentration of Ia and an increase in the size of Ia micelles,thus exhibiting a smaller micelle diffusion coefficient.
作者
孟君
田会娟
MENG Jun;TIAN Hui-juan(School of New Materials and Chemical Engineering,Tangshan University,Tangshan 063000,China)
出处
《唐山学院学报》
2023年第6期53-56,91,共5页
Journal of Tangshan University
