可降解型磺酸盐阴离子表面活性剂的表面活性

摘要

The surface tension of sodium 3［(2alkyl1,3dioxolan4yl)methoxyl］1propane sulfonates, in which the alkyl groups are heptyl, nonyl and undecyl respectively, in aqueous solution were measured by DuNouy method. Some fundamental data of these surfactants such as critical micelle concentrations(cmc),surface tensions of aqueous solutions at cmc(γcmc), the adsorption isotherms of these surfactants in aqueous solution (Γ) were determined. The emulsion abilities were measured. The results showed that these surfactants have high surface activity and same hydrophilic group, and the 1,3dioxolane ring are also hydrophilic. Their emulsifying abilities were determined.%用环法测定了系列含1,3二氧杂环戊烷基团的可降解磺酸盐阴离子表面活性剂HDMPS、NDMPS和UDMPS在水溶液中的表面张力浓度对数曲线,并由此得到了其他一些表面性质如临界胶束浓度(cmc), 临界胶束浓度时的表面张力γcmc和表面活性剂水溶液的吸附等温线,进而得到了饱和吸附超量(Γ∞)和饱和吸附时分子截面积A。这些表面活性剂具有较高的表面活性和相同的亲水基,1,3二氧杂环戊烷基团也有一定的亲水性。并测定了乳化力。