测定了自制的5种高纯度多烷基苯磺酸盐在25 ℃下的临界胶束浓度cmc(1×10-4 mol/L),测定了临界胶束浓度下的表面张力γcmc(mN/m). cmc和γcmc值分别为:(C12-5S)3.889和32.69;(C14-3S)1.000和31.40;(C14-5S)1.173和30.21; (C14-7S)3.720和28.55;(C16-5S)1.016和29.96. 根据Gibbs吸附公式求出饱和吸附量Γmax,饱和吸附面积Am. 及求出将水溶液表面张力降低20 mN/m所需表面活性剂浓度的负对数pc20. 从分子结构对求出的结果进行了解释.
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