Mixed micelles of n-alkyltrimethylammonium bromides: influence of alkyl chain length
Mixed micelles of n-alkyltrimethylammonium bromides: influence of alkyl chain length
复制标题
正烷基三甲基溴化铵的混合胶束：烷基链长度的影响
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
F. Sarmiento
中科院分区：
文献类型：
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作者：
J. L. López;M. Suárez;V. Mosquera;F. Sarmiento
通过分析临界胶束浓度(电导法测定)随溶液组成的变化，确定了n-己基三甲基溴化铵与n-辛基-，n-正十二基-，n-十二烷基溴化铵和n-十六烷基三甲基溴化铵二元混合物中的链长对胶束组成的影响。利用Motomura的理论处理，评估了混合胶束中各化合物的组成。用Holland和Rubingh理论得到的分子相互作用参数β来表示混合的非理想性。用Puvvada和Blanckschtein的分子热力学模型研究了混合物的非理想行为。
The influence of chain length on the composition of micelles in a binary mixture of n-hexyltrimethylammonium bromide and n-octyl-, n-decyl-, n-dodecyl-, n-tetradecyl- and n-hexadecyltrimethylammonium bromides has been determined from an analysis of the variation of the critical micelle concentration (determined by conductivity techniques) as a function of solution composition. Using the theoretical treatment of Motomura, the composition of each compound in mixed micelles was evaluated. The nonideality of mixing was expressed in terms of the molecular interaction parameter β, obtained with the Holland and Rubingh theory. The molecular thermodynamic model of Puvvada and Blanckschtein was used to study the nonideal behaviour of the mixtures.