Surface analysis of the proton exchange membranes prepared by pre-irradiation induced grafting of styrene/divinylbenzene into crosslinked thin PTFE membranes

Jingye Li, Shogo Ichizuri, Saneto Asano, Fumihiro Mutou, Shigetoshi Ikeda, Minoru Iida, Takaharu Miura, Akihiro Oshima, Yoneho Tabata, Masakazu Washio

    Research output: Contribution to journalArticle

    27 Citations (Scopus)

    Abstract

    The proton exchange membranes were obtained by pre-irradiation induced grafting of styrene with or without divinylbenzene (DVB) into thin crosslinked polytetrafluoroethylene (RX-PTFE) membranes with the thickness around 10 μm and successive sulfonation. The surface chemical structure and morphology of the non-grafted, the grafted, and the grafted and sulfonated RX-PTFE membranes were studied by means of X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) analysis. From the F/C atom ratio result, it was known that there are mainly polystyrene grafts on the surfaces of the styrene grafted RX-PTFE membranes, while there are mainly PTFE chains on the surfaces of the RX-PTFE membranes grafted by styrene together with DVB. "Wave" shape morphology on the surfaces of the grafted RX-PTFE membranes was observed. The F/C atom ratios on the surfaces of the grafted and sulfonated membranes are little lower than the corresponding grafted membranes before sulfonation. On the surface of the sulfonated membranes, the "wave" shape morphology was also observed. The distributions of the polystyrene grafts in the RX-PTFE membranes matrixes were strongly affected by the concentration of the crosslinking co-monomer, DVB, used in the graft polymerization, and the sulfonation will not change the distribution of the grafts obviously.

    Original languageEnglish
    Pages (from-to)260-272
    Number of pages13
    JournalApplied Surface Science
    Volume245
    Issue number1-4
    DOIs
    Publication statusPublished - 2005 May 30

    Fingerprint

    divinyl benzene
    Styrene
    Surface analysis
    Polytetrafluoroethylene
    Polytetrafluoroethylenes
    styrenes
    Protons
    Ion exchange
    Irradiation
    membranes
    Membranes
    irradiation
    protons
    Grafts
    Sulfonation
    Polystyrenes
    polystyrene
    Atoms

    Keywords

    • Crosslinked polytetrafluoroethylene
    • Pre-irradiation induced graft polymerization
    • Proton exchange membrane
    • Styrene/divinylbenzene
    • Surface analysis

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry
    • Surfaces, Coatings and Films
    • Condensed Matter Physics

    Cite this

    Surface analysis of the proton exchange membranes prepared by pre-irradiation induced grafting of styrene/divinylbenzene into crosslinked thin PTFE membranes. / Li, Jingye; Ichizuri, Shogo; Asano, Saneto; Mutou, Fumihiro; Ikeda, Shigetoshi; Iida, Minoru; Miura, Takaharu; Oshima, Akihiro; Tabata, Yoneho; Washio, Masakazu.

    In: Applied Surface Science, Vol. 245, No. 1-4, 30.05.2005, p. 260-272.

    Research output: Contribution to journalArticle

    Li, Jingye ; Ichizuri, Shogo ; Asano, Saneto ; Mutou, Fumihiro ; Ikeda, Shigetoshi ; Iida, Minoru ; Miura, Takaharu ; Oshima, Akihiro ; Tabata, Yoneho ; Washio, Masakazu. / Surface analysis of the proton exchange membranes prepared by pre-irradiation induced grafting of styrene/divinylbenzene into crosslinked thin PTFE membranes. In: Applied Surface Science. 2005 ; Vol. 245, No. 1-4. pp. 260-272.
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    AU - Li, Jingye

    AU - Ichizuri, Shogo

    AU - Asano, Saneto

    AU - Mutou, Fumihiro

    AU - Ikeda, Shigetoshi

    AU - Iida, Minoru

    AU - Miura, Takaharu

    AU - Oshima, Akihiro

    AU - Tabata, Yoneho

    AU - Washio, Masakazu

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    AB - The proton exchange membranes were obtained by pre-irradiation induced grafting of styrene with or without divinylbenzene (DVB) into thin crosslinked polytetrafluoroethylene (RX-PTFE) membranes with the thickness around 10 μm and successive sulfonation. The surface chemical structure and morphology of the non-grafted, the grafted, and the grafted and sulfonated RX-PTFE membranes were studied by means of X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) analysis. From the F/C atom ratio result, it was known that there are mainly polystyrene grafts on the surfaces of the styrene grafted RX-PTFE membranes, while there are mainly PTFE chains on the surfaces of the RX-PTFE membranes grafted by styrene together with DVB. "Wave" shape morphology on the surfaces of the grafted RX-PTFE membranes was observed. The F/C atom ratios on the surfaces of the grafted and sulfonated membranes are little lower than the corresponding grafted membranes before sulfonation. On the surface of the sulfonated membranes, the "wave" shape morphology was also observed. The distributions of the polystyrene grafts in the RX-PTFE membranes matrixes were strongly affected by the concentration of the crosslinking co-monomer, DVB, used in the graft polymerization, and the sulfonation will not change the distribution of the grafts obviously.

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