English  |  正體中文  |  简体中文  |  Items with full text/Total items : 69937/69937 (100%)
Visitors : 23170687      Online Users : 573
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version

    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50684

    Title: Cross-linked norbornene sulfonated poly(ether ketone)s for proton exchange membrane
    Authors: Chen,LK;Wu,CS;Chen,MC;Hsu,KL;Li,HC;Hsieh,CH;Hsiao,MH;Chang,CL;Chu,PPJ
    Contributors: 化學學系
    Date: 2010
    Issue Date: 2012-03-27 18:07:53 (UTC+8)
    Publisher: 國立中央大學
    Abstract: A new proton conducting membrane where the poly(ether ether ketone ketone) copolymer containing unsaturated norbornene unit and pendant sulfonic acid were synthesized by aromatic substitution polymerization reaction using 1,3-bis(4-fluorobenzoyl)benzene (DFBP), 6,7-dihydroxy-2-naphthalenesulfonate (DHNS), and 1,4-dihydro-1,4-methanonaphthalene-5,8-diol (NB-ph-diOH) monomers. The degree of sulfonation can be accurately controlled by adjusting the DHNS and NB-ph-diOH mole ratio in the feed stream. The increase of proton conductivity, water uptake and ion exchange capacity (IEC) are found to corroborate with increasing the DHNS feed concentration. Furthermore, cross-linking through the double bond in norbornene unit reduces both the methanol permeability and methanol solvent uptake. Current study shows that membrane with high proton conductivity and low methanol swelling can be optimized by balancing the degree of sulfonation (DS) with the degree of cross-linking through controlling DHNS (for optimized DS) feed concentration, and the DVB concentration (for optimized degree of cross-linking). The best membrane with high proton conductivity and low degree of swelling is NB-5PEEKK-80X. The DMFC single cell assembled using this membrane (85 mu m thickness) displayed fair density reaching 16.5 mW/cm(2) at 60 degrees C and 14.5 mW/cm(2) at 50 degrees C. (C) 2010 Elsevier B.V. All rights reserved.
    Appears in Collections:[化學學系] 期刊論文

    Files in This Item:

    File Description SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明