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个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 精细化工全国重点实验室主任，教育部智能材料化工前沿科学中心执行主任，大连理工大学膜科学与技术研究开发中心主任
性别：女
毕业院校：中国科学院大连化物所
学位：博士
所在单位：化工学院
学科：化学工程. 膜科学与技术. 生物医学工程
联系方式：hgaohong@dlut.edu.cn
电子邮箱：hgaohong@dlut.edu.cn
Differences in Water Sorption and Proton Conductivity Between Nafion and SPEEK
点击次数：
论文类型：期刊论文
发表时间：2011-10-15
发表刊物：JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
收录刊物：Scopus、SCIE、EI
卷号：49
期号：20
页面范围：1437-1445
ISSN号：0887-6266
关键字：conducting polymers; conductive network; ionomers; membranes; microstructure; poly(ether ketones); swelling
摘要：Water sorption, volumetric expansion, and proton conductivity of 1100 EW Nafion and 555 EW sulfonated polyetheretherketone (SPEEK) were compared as functions of water activity at 60 and 80 degrees C. Water sorption in Nafion occurs with a small positive volume of mixing, similar to 0.005 cm(3)/cm(3). In contrast, water sorption in SPEEK has a large negative volume of mixing similar to-0.05 cm(3)/cm(3). The percolation thresholds for proton conduction occur at hydrophilic volume fractions of 0.10 in Nafion and 0.30 in SPEEK. Proton conductivity increases quadratically with hydrophilic volume fraction above the percolation threshold. The different percolation thresholds suggest the hydrophilic domains in Nafion grow from lamella, whereas the hydrophilic domains in SPEEK grow from spheres. (C) 2011 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 49: 1437-1445, 2011