%A Zhao Jian-Xi;Zhu Yong-Ping;You Yi;Cai Wei-Rong
%T Mixed Micellization of C_{12}-*s*-C_{12}•2Br and n-Hexanol in Aqueous Solution
%0 Journal Article
%D 2003
%J Acta Phys. -Chim. Sin.
%R 10.3866/PKU.WHXB20030616
%P 557-559
%V 19
%N 06
%U {http://www.whxb.pku.edu.cn/CN/abstract/article_25410.shtml}
%8 2003-06-15
%X The effects of n-hexanol on the micellization of quaternary ammonium dimeric surfactants (C12-s-C12•2Br,s=3,4,6) have been examined using conductivity and steady fluorescence measurements.The results showed that the critical micelle concentration cmc decreases with the addition of n-hexanol.The larger s,the stronger the effect.The dimeric surfactant and n-hexanol form the mixed micelles with the alkyl chains of n-hexanol molecules penetrating into the micelle interior and with hydroxyl groups lie in the palisade layer of the micelle.At the same concentration of n-hexanol in aqueous solution,the molar fraction of n-hexanol in the mixed micelle is almost the same for different s.The ionization degree of the mixed micelle increases with increasing n-hexanol concentration.