文献类型：期刊文献

英文题名：Rheological properties of mixed aqueous solutions of geminis (12-3-12,2Br-) and SDS

作者：Shang, Yazhuo[1]; Chen, Qibin[1]; Liu, Honglai[1]

机构：[1] State Key Laboratory of Chemical Engineering, Department of Chemistry, East China University of Science and Technology, Shanghai, China

年份：2007

卷号：28

期号：6

起止页码：854

外文期刊名：Journal of Dispersion Science and Technology

收录：EI(收录号：20073710807218)

语种：英文

外文关键词：Crystal microstructure - Liquid crystals - Newtonian liquids - Rheology

摘要：The rheological properties of surfactant solutions are the main parameter that affects the surfactant application. In this work, the rheology of the mixed system 12-3-12,2Br-/SDS/H2O was discussed particularly. The relationship between the microstructure of surfactant aggregates and rheology of mixed solutions was explored. It is shown that the rheological properties of solutions have different behaviors at different molar ratio of two surfactants under given total concentration. With the increase of molar ratio (12-3-12,2Br-/ SDS), the solution change from Newtonian liquid into positive thixotropy then to negative thixotropy, at last turn to positive thixotropy again, and ATPS becomes the dividing line. The difference of rheological properties is the embodiment of difference for surfactant aggregates' microstructures. The cryo-TEM results shown that the solutions containing aggregates with big size, such as rodlike micelles, multilamellar micelles, show positive thixotropy. However, the solutions containing lamellar micelles or liquid crystal will show negative thixotropy. The positive thixotropy endows the mixied system a potential application in enhanced oil recovery.