文献类型：期刊文献

英文题名：Wormlike Micelles in Mixed Amino Acid-Based Anionic Surfactant and Zwitterionic Surfactant Systems

作者：Lu, Haiwei[1];Yuan, Minjia[2];Fang, Bo[1];Wang, Jinshuang[1];Guo, Yiguang[2]

机构：[1]E China Univ Sci & Technol, Lab Chem Engn Rheol, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China;[2]Shanghai Jahwa Co Ltd, Shanghai 201702, Peoples R China

年份：2015

卷号：18

期号：4

起止页码：589

外文期刊名：JOURNAL OF SURFACTANTS AND DETERGENTS

收录：;EI(收录号：20151300691639);WOS:【SCI-EXPANDED(收录号:WOS:000356164100004)】；

基金：Authors are grateful for funding from Shanghai Jahwa Co. Ltd, and Clariant Co. Ltd, Evonik Industries for supplying materials. And thanks to the Cryo-TEM technology support from the key laboratory of colloid and interface chemistry, Shandong University.

语种：英文

外文关键词：Amino acid-based surfactant; Zwitterionic surfactant; Wormlike micelles; Rheology; Cryo-TEM

摘要：The formation of wormlike micelles in aqueous solutions of an amino acid-based surfactant, sodium lauroyl sarcosinate (LS) and a zwitterionic surfactant, cocamidopropyl betaine (CAPB) has been investigated. Holding the total concentration of LS and CAPB constant at 12 wt%, the synergistic effects of mass ratio of CAPB and LS and pH of the micelle solution on rheological behaviors of CAPB/LS micelles were studied. The viscosity of CAPB/LS micelle systems with a mass ratio from 4:8 to 9:3 increases to maximum values and then decreases as pH increases from 4.0 to 5.6. The maximum viscosity of the transparent CAPB/LS micelle solution is nearly 5500 mPa center dot s with a mass ratio of CAPB/LS = 8:4 at pH 5.10. It is suggested that the proper pH for CAPB and LS to form wormlike micelles should be close to the isoelectric point of the CAPB/LS solution. The results of thixotropy measurements show that the appropriate mass ratio of CAPB/LS can improve the stability of the network structure of wormlike micelles. In addition, viscosity curves of CAPB/LS wormlike micelles follow a nonlinear co-rotational Jeffreys model, and the linear viscoelasticity of CAPB/LS wormlike micelles can be described by a linear viscoelastic Jeffreys model. The network of wormlike micelles is confirmed by Cryo-TEM images.