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个人信息Personal Information
教授
博士生导师
硕士生导师
性别:女
毕业院校:大连理工大学
学位:博士
所在单位:化工学院
学科:膜科学与技术. 化学工程
办公地点:大连理工大学西部校区 化工实验楼D407
大连理工大学盘锦校区 D01 221
联系方式:📱/微信:13940978991
电子邮箱:xuemeiw@dlut.edu.cn
Quaternized poly(ether ether ketone) hydroxide exchange membranes for fuel cells
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论文类型:期刊论文
发表时间:2011-06-15
发表刊物:JOURNAL OF MEMBRANE SCIENCE
收录刊物:SCIE、EI
卷号:375
期号:1-2
页面范围:204-211
ISSN号:0376-7388
关键字:Hydroxide exchange membrane; Poly (ether ether ketone); Chloromethylation; Quaternization; Fuel cell
摘要:Chloromethylated PEEK (CMPEEK) was successfully synthesized for the first time by concentrated sulfuric acid as the solvent and its degree of chloromethylation (DC) was controlled (38-98%) by varying the chloromethylation time. The sulfo nation of PEEK was confirmed to be negligible during the chloromethylation by (1)H NMR analysis. CMPEEKs are soluble in high-boiling-point solvents, which makes it possible to prepare CMPEEK membranes. Subsequently, it was quaternized and ion-exchanged by NaOH to form quaternized PEEK hydroxide (QAPEEKOH) membrane. The ion exchange capacity of QAPEEKOH membranes ranges from 0.43 to 1.35 mmol g(-1), and the corresponding degree of quaternization of chloromethyl group increases from 35% to 61%. QAPEEKOH membranes from DC of 38-70% have appropriate water uptake (<= 145%) and moderate swelling ratio (<= 27%) even at 60 degrees C. More importantly, their hydroxide conductivities, such as 12 mS cm(-1) at 30 degrees C and 0.95 mmol g(-1) of IEC, are higher than those of most other quaternized aromatic polymer membranes. TGA shows that QAPEEKOH has high thermal stability (T(OD): 148 degrees C). All the above properties indicate that QAPEEKOH membrane is very promising for the potential application in hydroxide exchange membrane fuel cells. (C) 2011 Elsevier B.V. All rights reserved.