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论文类型：期刊论文

发表时间：2013-06-27

发表刊物：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录刊物：SCIE、EI

卷号：38

期号：19

页面范围：7964-7972

ISSN号：0360-3199

关键字：Hydroxide exchange membrane; Polyetherimide; Quaternization; Alkaline membrane fuel cell

摘要：0 A series of soluble quaternized polyetherimides (QAPEIs) have been successfully synthesized by homogeneous quaternization in trimethylamine aqueous solution. H-1 NMR spectra confirm the successful synthesis of QAPEI. The QAPEIs exhibit good solubility in membrane-preparation solvents, making it possible to prepare the QAPEI composite membrane. Novel composite hydroxide exchange membranes have been prepared by incorporating QAPEIs with polytetrafluoroethylene (PTFE) membranes. The SEM images, gas permeation measurements and FTIR spectra show that the QAPEI is successfully filled in PTFE membrane and the resulted composite membrane is dense and smooth. The ion exchange capacity of composite membranes ranges from 0.35 to 0.58 mmol g(-1). The composite membranes have appropriate water uptake (<= 154%) and moderate swelling ratio (<= 42%) even at 60 degrees C. The hydroxide conductivity of the composite membrane reaches 11.9 mS cm(-1) at 20 degrees C that increases to 35.2 mS cm(-1) at 60 degrees C. TGA curve shows that the composite membrane possesses high thermal stability (T-OD: 210 degrees C). All these properties indicate that the QAPEI/PTFE composite membranes are good candidates for use as HEMs in HEM fuel cells. Copyright 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.