气-液界面间表面活性剂物质的吸附状态

利用Gibbs吸附公式,通过测量溶液浓度和表面张力可以计算最大吸附量时表面活性剂的表面吸附量,进而计算得到每个分子所占有的表面积;通过与分子本身大小比较能够推测出分子在表面的吸附状态。本文利用文献值,通过计算得出常见的离子型、非离子型及Gemini型表面活性剂在CMC时的平均分子占有面积,同时将具有表面活性的丁醇一并比较。结果发现,各类分子在表面的占有面积为头基的1~2倍,紧密程度为Gemini型离子型丁醇非离子型;同类型之间,支链较多且取代基分子量较大时排列疏松。同时,温度对其影响也进行了对比分析。

Adsorption state of surfactant at air-liquid interface

Using the Gibbs-adsorption theory,surfactant area of every molecular at the critical micelle concentration(CMC) were calculated by measuring surface tension and solution concentration.Therefore,the molecular aggregation state at the air-liquid interface can be speculated by comparing with the truth value.In this article,we figured out the area of some molecule including ion-surfactant,nonion-surfactant,and Gemini-surfactant at CMC,furthermore,the adsorption structure of butanol was studied.The results show ...