RISS 학술연구정보서비스

검색
다국어 입력

http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.

변환된 중국어를 복사하여 사용하시면 됩니다.

예시)
  • 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
  • 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
닫기
    인기검색어 순위 펼치기

    RISS 인기검색어

      검색결과 좁혀 보기

      선택해제

      오늘 본 자료

      • 오늘 본 자료가 없습니다.
      더보기
      • 무료
      • 기관 내 무료
      • 유료
      • KCI등재

        Proton-Conducting Polymers Derived from Radiation Grafting and Sulphonation of Poly(tetraflouroethylene-perflourovinyl ether) Film with Three Rare-Earth Elements

        Mohamed Mohamady Ghobashy,Ahmed M. Elbarbary,Naeem M. El-Sawy,Hany M. Hosni 한국고분자학회 2017 Macromolecular Research Vol.25 No.9

        Progress in the area of proton conducting polymer electrolyte membranes is closely with the enhancing of polymer electrolyte membrane fuel cells. Fluorinated polymers, e.g. poly(tetraflouroethylene-perflourovinyl ether) (PFA) film is largely driven by their thermal properties. In this article PFA film was developments to be suitable as proton conducting polymer electrolyte membranes. The grafting of acrylic acid (80%) onto the PFA film achieved by irradiation techniques and PFA-COOH was obtained. In addition, to synthesis of completely a new protonconducting sulfonated polymer ionomers this could be acheived by sequences of chemical modification steps. PFA-COOH has been anilination and sulfonated to a sufficient ionomers formation and complexion with the three rare-earth elements (Li, Cs, and Sr). After that the obtained PFA-CO-NH-ph-SO3M contains a sufficient equilibrium concentration of protons in a wet atmosphere to show useful proton conduction at ambient temperatures. The sulfonated polymers containing 63mol% sulfonic acid, and characterized by FTIR-ATR and SEM The results show that PFACO- NH-ph-SO3M wet film showed a high proton-conductivity in water (10-3 Scm-1) rather than methanol (10-6 Scm-1) in order Li+> Sr++>Cs+. This approach has interesting potential for smart thin film materials and offers also the possibility to be used in sensors and fuel cells provided that the electrolyte film thickness is in the micrometre range.

      연관 검색어 추천

      이 검색어로 많이 본 자료

      활용도 높은 자료

      해외이동버튼