文献类型：期刊文献

英文题名：Effects of Amphiphilic Copolymer Dispersants on Rheology and Stability of Coal Water Slurry

作者：Huang, Jing[1];Xu, Jun[1];Wang, Dong[1];Li, Li[1];Guo, Xuhong[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2013

卷号：52

期号：25

起止页码：8427

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20132716470393);WOS:【SCI-EXPANDED(收录号:WOS:000321236300009)】；

基金：We acknowledge the financial support by the National Natural Science Foundation of China (51003028, 51273063, and 11076002/A06), the Fundamental Research Funds for the Central Universities, and the Higher School Specialized Research Fund for the doctoral program (20110074110003) for support of this work.

语种：英文

外文关键词：Polyols - Styrene - Polyethylene glycols - Coal - Rheology - Stabilization

摘要：As dispersants of coal water slurry (CWS), two kinds of amphiphilic copolymers were synthesized by grafting of poly(styrene-co-maleic anhydride) with 1-naphthylamine-6-sulfonic acid alone (SMANS) or together with methoxypolyethlene glycol (SMANP), and characterized by H-1 NMR and GPC. Their effects on the rheological behaviors and stability of MS were investigated. The Cross model was employed to quantitatively describe the rheological behavior of CWS. It was found that amphiphilic copolymer dispersants remarkably reduced the viscosity and improved the stabilization of CWS. The electrostatic repulsion and steric hindrance generated by the copolymer dispersants are believed to play an important role. With the presence of sulfonate groups, both kinds of copolymer dispersants can provide electrostatic repulsion among coal particles after adsorption. For SMANP, the polyethlene glycol (PEG) pendants offer additional steric hindrance to further stabilize the CWS. On the basis of these results, the mechanism of dispersion and stabilization of CWS by the copolymer dispersants was proposed.