文献类型：期刊文献

英文题名：Study of the interaction between a diblock polyelectrolyte PDMA-b-PAA and a gemini surfactant 12-6-12 in basic media

作者：Kang, Hongmei[1]; Peng, Baoliang[1]; Liang, Yanyan[1]; Han, Xia[1]; Liu, Honglai[1]

机构：[1] Lab for Advanced Materials, Department of Chemistry, East China University of Science and Technology, Shanghai, 200237, China

年份：2009

卷号：333

期号：1

起止页码：135

外文期刊名：Journal of Colloid and Interface Science

收录：EI(收录号：20091211974910)

语种：英文

外文关键词：Fluorescence spectroscopy - Hydrophobicity - Hydrophilicity - Surface active agents - Electrostatics - Light scattering

摘要：The interactions between negatively charged diblock polyelectrolyte PDMA71-b-PAA59 and oppositely charged gemini surfactant hexylene-1,6-bis(dodecyldimethylammonium bromide) (12-6-12) in basic media were studied using dynamic light scattering, fluorescence spectroscopy, surface tension, and 1H NMR. With increased addition of surfactant, the conformation of polyelectrolyte experienced changes from the initial unimer with open-extended PAA block, to the nano-scaled aggregates/complexes with a maximum hydrodynamic diameter (Dh), and finally to the stable complexes with a smaller Dh. Accordingly, the value of Dh during the whole process of increasing the surfactant concentration changed from 14-17 nm, to 184 nm, and to the final 70 nm, respectively. This transformation was driven by the electrostatic attractive/repulsive interactions, the hydrophobic interaction between hydrophobic surfactant tails, and the hydrophilicity of PDMA block. ? 2009 Elsevier Inc. All rights reserved.