期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 42, 期 34, 页码 21880-21885出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2017.02.210
关键词
Copolymer membranes; Casting; Flexure modulus; Porosity
资金
- CONACYT (National Council of Science and Technology)
Two copolymers of poly(styrene-co-acrylic acid) (PS-AA) were synthesized in solution by radical polymerization and partially crosslinked by adding, either trimethylol propane trimethacrylate (TMPTMA) or divinylbenzene (DVB) to improve mechanical resistance. Copolymers were sulfonated with theoretical molar quantities of sulfuric acid (H2SO4 = 170%) and two different amounts of silver sulfate (Ag2SO4 = 0.11 or 0.055%). Materials were dissolved in three different solvent compositions: copolymer + THF, copolymer + THF+55% DMSO and copolymer + THF+110% DMSO and used to prepare membranes prepared by casting. Membranes were characterized by Thermomechanical Analysis (TMA), Scanning Electron Microscopy (SEM), Ionic Exchange Capacity (IEC) and Water Uptake (WU) capacity. Addition of DMSO to THF during casting procedure has an important increment on IEC and WU results; however, mechanical resistance is considerably reduced. SEM images show almost no pores in the membranes casted from THF alone, while increasing the amount of DMSO enhances porosity. Such phenomenon is responsible for reduced mechanical property (brittleness), as seen by TMA. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据