烷基苯磺酸盐与烷烃间界面性能研究

测定了三种烷基苯磺酸盐异构体的最小烷烃碳数（nmin），研究了盐、异戊醇、烷基苯磺酸盐含量对复合体系油/水界面张力的影响。结果表明:在盐、异戊醇、烷基苯磺酸盐的质量分数分别为0.3%，1.5%和0.1%条件下，界面张力能降至0.001mN/m以下；在复合体系中异戊醇、烷基苯磺酸盐质量分数不变条件下，随油相烷烃碳数的增长，界面张力降至0.001mN/m以下时所需含盐量增大，依次为0.28%～0.32%，0.32%～0.38%，0.37%～0.48%；对于三种烷基苯磺酸盐同分异构体，随芳基向长烷基链中心移动，对应的nmin逐渐增加，依次为10，11，16；在复合体系中异戊醇、盐质量分数不变情况下，以相应的烷烃为油相，三种烷基苯磺酸盐质量分数在0.08%～0.16%时，都能将界面张力降至0.001mN/m以下。

STUDY ON INTERFACIAL PROPERTY BETWEEN ALKYLBENZENE SULFONATE AND ALKANE

The influence of salt,isoamyl alcohol and surfactant concentration on the compound system of oil/water interfacial tension is researched in this paper.The minimum carbon number of n-alkane of three kinds of alkylbenzene sulfonate isomers is studied.Results show that when the mass of salt,alcohol,alkylbenzene sulfonate,is 0.3%，1.5% and 0.1% respectively,the interfacial tension values can be achieved 0.001 mN/m.When the mass of alcohol,alkylbenzene sulfonate unchanged,with the carbon number of oil phase growing,the salt content at which the interfacial tention reaches 0.001mN/m increases by 0.28%~0.32%,0.32%~0.38% and 0.37%~0.48% respectively.The nmin of three isomers increases with the aromatic moving from the edge to the centre in the long alkyl chain,followed by 10,11,16.Under the condition of the mass of alcohol,salt unchanged,the interfacial tention between alkylbenzene sulfonate solution and corresponding alkane can reach 0.001mN/m while the mass of three kinds of alkylbenzene sulfonate isomers is 0.08%~ 0.16%.