文献类型：期刊文献

英文题名：A drag reducing surfactant threadlike micelle system with unusual rheological responses to pH

作者：Shi, Haifeng[1];Ge, Wu[1];Wang, Yi[2];Fang, Bo[3];Huggins, Jacob T.[1];Russell, Tyler A.[1];Talmon, Yeshayahu[4];Hart, David J.[5];Zakin, Jacques L.[1]

机构：[1]Ohio State Univ, Dept Chem & Biomol Engn, Columbus, OH 43210 USA;[2]China Univ Petr, Beijing Key Lab Urban Oil & Gas Distribut Technol, Beijing 102249, Peoples R China;[3]E China Univ Sci & Technol, Res Ctr Chem Engn, Shanghai 200237, Peoples R China;[4]Technion Israel Inst Technol, Dept Chem Engn, IL-32000 Haifa, Israel;[5]Ohio State Univ, Dept Chem, Columbus, OH 43210 USA

年份：2014

卷号：418

起止页码：95

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20140117168287);WOS:【SCI-EXPANDED(收录号:WOS:000330748700013)】；

基金：This work was financially supported by a Presidential Fellowship awarded to H. Shi from The Ohio State University and by National Natural Science Foundation of China (51206186). Thanks to Dr. Ellina Kesselman and Ms. Judith Schmidt for their help with cryo-TEM experiments.

语种：英文

外文关键词：pH-responsive; Threadlike micelles (TLMs); Rheology; Drag reduction; Cryo-transmission electron microscopy (Cryo-TEM); NMR; Zeta potential

摘要：A pH-responsive threadlike micellar system was developed by mixing alkyl bis(2-hydroxyethyl)methylammonium chloride (EO12) and trans-o-coumaric acid (tOCA). The rheological response of this system to pH is unusual in that it has viscoelasticity at both high and low pH levels, while it shows water-like behaviors at medium pH. Cryogenic transmission electron microscopy (Cryo-TEM) images confirmed the presence of TLMs at pH 3.5 and pH 9.8. This system also had DR (drag reduction) capability at low and high pH. The unusual rheological and micellar responses of this system to pH are caused by the dual pK(a)'s of tOCA. H-1 NMR and zeta potential results support this hypothesis. (C) 2013 Elsevier Inc. All rights reserved.