无机盐的存在对阴离子型表面活性剂临界胶束浓度的影响规律  

The Influence on the Critical Micelle Concentration of Anionic Surfactant Mixed with Inorganic Salt

作　　者：张亿良[1] 周日辉[1] 

机构地区：[1]上饶师范学院化学系,江西上饶334001

出　　处：《上饶师范学院学报》2003年第6期48-53,共6页Journal of Shangrao Normal University

摘　　要：在25℃时用电导法测量加入无机盐(NaCl、Na2CO3、CaCl2、SmCl3)的十二烷基硫酸钠溶液的电导率κ,用作图法得出此类溶液的CMC值。根据CMC的变化可得出无机盐的存在对阴离子型表面活性剂CMC值的影响规律。实验表明,表面活性剂CMC值与无机盐中反离子浓度有如下关系:lgCMC=-2.4-0.085lg[Na+],lgCMC=-2.4-0.051lg[Ca2+],lgCMC=-2.3-0.021lg[S3+m]。同时发现,以上直线方程中的斜率B与无机盐中反离子的电价数Z之间存在如下关系:B=0.116-3.20×10-2Z。The conductivity of sodium lauryl sulfate mixed with inorganic salt (NaCl?Na 2CO 3?CaCl 2?S mCl 3 ) is measured on 25℃.And the critical micelle concentration is got by drawing with the concentration of the sodium lauryl sulfate solution. Then an influence on the CMC of anionic surfactant mixed with inorganic salt is generalized from the variation of the CMC. The experiment indicated that there is following relation between the CMC of surfactant and the concentration of the counter ion of the inorganic salt: lgCMC=-2.4-0.085 lg, lgCMC=-2.4-0.051 1g, lgCMC=-2.3-0.021 1g. And according to the material the following relation between the slope ratio of the straight and the electric charge number of the counter ion is: B=0.116-3.20×10^(-2)Z.

关 键 词：无机盐 阴离子型表面活性剂 临界胶束浓度 电导法 电导率 电价数 反离子 十二烷基硫酸钠 CMC值 

分 类 号：O647.2[理学—物理化学] O657.11[理学—化学]