TY - JOUR
T1 - Study on poly-electrolyte membrane of crosslinked PTFE by radiation-grafting
AU - Sato, Kohei
AU - Ikeda, Shigetoshi
AU - Iida, Minoru
AU - Oshima, Akihiro
AU - Tabata, Yoneho
AU - Washio, Masakazu
N1 - Funding Information:
The authors acknowledge Prof. Y. Katsumura and Dr. C. Matsuura for γ-ray irradiation experiments and various discussions. The authors also acknowledge Prof. Y. Hama and Research associate T. Oka for FT-IR experiments. The development of the new PEM using RX-PTFE was supported by projects of “Research and Development of Polymer Electrolyte Fuel Cell” in the New Energy and Industrial Technology Development Organization (NEDO).
PY - 2003/8
Y1 - 2003/8
N2 - Polymer electrolyte fuel cell membrane based on crosslinked polytetrafluoroethylene (PTFE) [RX-PTFE] has been processed by radiation-grafting with reactive styrene monomers by γ-rays under atmospheric circumstances, and the characteristic properties of the obtained membranes have been studied. The grafting yields of styrene monomer onto RX-PTFE, which have various crosslinking densities, were in the range of 5-100%. At the reaction period of 24 h, the grafting yields for RX-PTFE with low crosslinking density, which was reacted at 60 °C, achieved 94%. As a tendency, the lower grafting temperature gives higher grafting ratio of styrene onto RX-PTFE. Moreover, the yields of subsequent sulfonation for all samples were close to 100%. Mechanical properties were decreased with increasing grafting yields; especially the membrane with higher grafting yields was brittle. Ion exchange capacity of sulfonated RX-PTFE reached 1.1 meq/g while maintaining the mechanical properties.
AB - Polymer electrolyte fuel cell membrane based on crosslinked polytetrafluoroethylene (PTFE) [RX-PTFE] has been processed by radiation-grafting with reactive styrene monomers by γ-rays under atmospheric circumstances, and the characteristic properties of the obtained membranes have been studied. The grafting yields of styrene monomer onto RX-PTFE, which have various crosslinking densities, were in the range of 5-100%. At the reaction period of 24 h, the grafting yields for RX-PTFE with low crosslinking density, which was reacted at 60 °C, achieved 94%. As a tendency, the lower grafting temperature gives higher grafting ratio of styrene onto RX-PTFE. Moreover, the yields of subsequent sulfonation for all samples were close to 100%. Mechanical properties were decreased with increasing grafting yields; especially the membrane with higher grafting yields was brittle. Ion exchange capacity of sulfonated RX-PTFE reached 1.1 meq/g while maintaining the mechanical properties.
KW - Crosslinked PTFE
KW - Poly-electrolyte membrane
KW - Polymer electrolyte fuel cell
KW - Radiation-grafting
KW - Styrene monomer
UR - http://www.scopus.com/inward/record.url?scp=0038148637&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0038148637&partnerID=8YFLogxK
U2 - 10.1016/S0168-583X(03)00898-X
DO - 10.1016/S0168-583X(03)00898-X
M3 - Conference article
AN - SCOPUS:0038148637
SN - 0168-583X
VL - 208
SP - 424
EP - 428
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
IS - 1-4
T2 - Ionizing Radiation and Polymers
Y2 - 21 September 2002 through 26 September 2002
ER -