基于可再生原料的表面活性剂复配体系的优异润湿性:吸附和胶束化过程中的协同效应

Perfectly Wetting Mixtures of Surfactants from Renewable Resources: The Interaction and Synergistic Effects on Adsorption and Micellization

本文研究了由可再生原料制备的三种表面活性剂(APG、AE、脂肪酸钠)复配后的表面性能,主要目的是优化一元、二元、三元复配溶液和不同p H条件下产生最佳润湿性的复配表面活性剂比例。结果表明:几种复配表面活性剂溶液在界面张力、临界胶束浓度和混合胶束化过程中存在协同效应。AE-APG复配后展现了最佳润湿性能。AE-APG-脂肪酸钠三元复配体系在聚四氟乙烯表面和玻璃表面的接触角随着浓度增大而略微减小。此外,所有复配溶液在酸性、碱性及中性介质中都展现了良好的表面性能。与其他p H条件下相比,当p H=7时,AE∶脂肪酸钠(1∶2)、AE:APG(2∶1)和AE∶APG∶脂肪酸钠(1∶1∶1)提高了铝表面和玻璃表面的润湿力。以上研究表明:使用很少的表面活性剂可以达到清洗、润湿和增溶的效果,同时还可降低成本、保护环境。

This paper presents a study of the surface properties of mixtures of surfactants originating from renewable sources, i.e., alkylpolyglucoside （APG）, ethoxylated fatty alcohol （AE）, and sodium soap （Na soap）. The main objective was to optimize the surfactant ratio which produces the highest wetthlg properties during the analysis of the solution of the individual surftctants, toward three-component mixtures, and at different pH values. The resttlts showed the existence of a synergistic effect in lowering the interfacial tension, critical micelle concentration and the formation of nfixed micelles in selected solutions. We found that best wetting properties were measured for the binary AE：APG mixtures. It has been demonstrated that slightly lower contact angles values were observed on Teflon and glass surfaces for the AE： APG：- soap mixtures but the results were obtained for higher concentration of the components. In addition, ,all studied solutions have very good surface properties in acidic, basic and neural media. However, the AE：soap （molar ratio of 1：2）, AE：APG （2：1） and AE：APG：soap （1：1：1） compositions improved their wetting power at pH 7 on the alumilfium and glass surfaces, ;ts compared to solutions at other pH values tested （selected H values close to zero--peffecfly wetting liquids）. All described effects detected would allow less surfactant to be used to achieve the maximum capacity of washing, wetting or solnbilizing while minimizing costs and demonstrating environmental care.