Dynamics of mixed surfactants in aqueous solutions.
Dynamics of mixed surfactants in aqueous solutions.
复制标题
DOI：
10.1021/jp107858y
复制
发表时间：
2011-03
期刊：
影响因子：
--
通讯作者：
Yan Jiang;Hong Chen;S. Mao;P. Luo;You-ru Du;Maili Liu
中科院分区：
文献类型：
--
作者：
Yan Jiang;Hong Chen;S. Mao;P. Luo;You-ru Du;Maili Liu
本文用核磁共振（NMR）技术在分子水平上研究了混合表面活性剂在水溶液中的动力学。研究了两类二元混合表面活性剂离子/非离子混合溶液的共振峰的线宽和线形（12-2-12/TX-100、14-2-14/TX-100、14-2-14/Brij-35和SDS/TX-100）和离子/离子混合溶液（12-2-12/TTAB和14-2-14/TTAB），在（1）H NMR谱中提供了关于混合对水溶液中单体和胶束中单体之间的表面活性剂交换动力学的影响的半定量结果。结果表明，在3种阳离子/非离子混合溶液中，混合表面活性剂的交换速率相互增强，而在2种阳离子/阳离子混合溶液中，混合表面活性剂的交换速率相互降低。对于SDS/TX-100混合体系，SDS的加入使TX-100在溶液中的交换速率加快，而TX-100使SDS在溶液中的交换速率减慢。这些结果提供了一些信息，表面活性剂在混合溶液中的相互作用。
The dynamics of mixed surfactants in aqueous solution has been studied at a molecular level by nuclear magnetic resonance (NMR) spectroscopy. The line widths and line shapes of the resonance peaks of two types of binary mixed surfactant systems, ionic/nonionic mixed solutions (12-2-12/TX-100, 14-2-14/TX-100, 14-2-14/Brij-35, and SDS/TX-100) and ionic/ionic mixed solutions (12-2-12/TTAB and 14-2-14/TTAB), in the (1)H NMR spectra offered semiquantitative results about the influence of mixing on the surfactant exchange dynamics between monomers in aqueous solution and those in the micelles. The results showed that the exchange rates of the mixed surfactants were enhanced by each other for the three cationic/nonionic mixed solutions, while the exchange rates were lowered by each other for the two cationic/cationic mixed solutions. As for SDS/TX-100 mixed systems, the addition of SDS made the exchange rate of TX-100 in solution faster, while TX-100 made the exchange rate of SDS slower. These results provide some information about surfactant interaction in mixed solutions.