期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 38, 期 14, 页码 6268-6274出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2012.11.144
关键词
Block copolymer; Proton exchange membrane; Phase separation; AFM
资金
- NRF
- Ministry of Education, Science and Technology [2011-0010538]
- Human Resources Development of the KETEP
- Korea Government Ministry of Knowledge Economy [20114030200060]
- Program of RIC (Woosuk University)
- Ministry of Trade, Industry & Energy (MOTIE), Republic of Korea [B0010583] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2011-0010538] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A new series of partially fluorinated and sulfonated poly(biphenylsulfone ketone) block copolymers as proton exchange membrane materials were prepared from hydrophilic and hydrophobic oligomers. The copolymers were characterized by proton NMR, FT-IR, GPC, thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC) thermograms. The membranes showed excellent thermal and oxidative stability; e.g., TGA and DSC demonstrated that all sulfonated block copolymers exhibited good thermal stability with an initial weight loss at temperatures above 200 degrees C. Block-30 membranes showed low water uptake and acceptable ionic exchange capacity (IEC). The proton conductivity of the block-30 was 75 mS cm(-1) at 90 degrees C and 100% relative humidity (RH), while Nafion-117 had a value of 98 mS cm(-1) under the same conditions. AFM analysis of the Block-30 clearly showed that the morphology of the membranes separated the hydrophilic and hydrophobic domains which provided an effective proton-transport pathway. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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