English  |  正體中文  |  简体中文  |  Items with full text/Total items : 16974/19261 (88%)
Visitors : 7668890      Online Users : 377
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.cnu.edu.tw/handle/310902800/22034


    標題: Preparation and characterizations of asymmetric sulfonated Polysulfone Membranes by wet phase inversion method
    作者: Shih-Hsiung Chen
    Rey-May Liou
    Cheng-Lee Lai
    Jing-Song Chang
    C. Y. Chang
    Mu-Ya Hung
    Cheng-Hsien Huang
    貢獻者: 環境工程與科學系
    日期: 2008-07
    上傳時間: 2009-11-27 15:53:19 (UTC+8)
    摘要: This paper presents an original approach to prepare the asymmetric sulfonated polysulfone membranes by using wet phase inversion method and their application for dehydrating a water/ethanol mixture by pervaporation. The separation performances of sulfonated membranes were strongly affected by the degree of sulfonation. The substitution degree of sulfonic group enhanced the permselectivity of sulfonated polysulfone membranes. Based on the morphology observation and light transmittance measurement, the degree of sulfonation presented less influence on the membrane formation pathway in wet phase inversion process. The sorption and permeation properties showed that the permselectivity of asymmetric membrane was dominated by the permeate diffusion rather than the permeate sorption in the skin layer. The high performance of pervaporation membrane was achieved by phase inverse method with sulfonated polysulfone.
    In this investigation, we found that this work is successful to prepare the asymmetric sulfonated polysulfone membranes by using wet phase inversion method and showed the good performance for dehydrating water/ethanol mixture by pervaporation. The similar light transmittance of those casting solutions implied that the polarity change of modified polymer did not strongly affect the demixing behavior. On the other hand, the less demixing time in water bath will be lead to a thin skin layer of sulfonated membranes. Base on the AFM observation, the roughness on the skin layer of sulfonated membranes decreased with increasing the sulfonation degree of polymers. It is indicated that the sulfonation affect the surface s roughness of sulfonated membranes. The substitution of sulfonic group on polysulfone enhanced both of the permeation flux and the separation factor at 90% ethanol in feed. The sulfonated membranes showed well hydrophilic properties and benefit both of their swelling properties and permeate permeation flux. The sorption and permeation measurement showed that the permselectivity of asymmetric membrane was dominated by the permeate diffusion control rather than the permeate sorption in the dense skin layer. The high performance of pervaporation membrane was prepared by phase inverse method by using the polymer sulfonation method.
    Appears in Collections:[環境工程與科學系(所)] 會議論文

    Files in This Item:

    There are no files associated with this item.



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


    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback