2007 年 75 巻 2 号 p. 175-178
Proton exchange membranes for use in fuel cells were prepared by our original ion-track technology, which involves (i) the swift heavy ion irradiation of polyvinylidene fluoride films and subsequent chemical etching to obtain cylindrical pores, and (ii) the filling of proton-conducting polymer chains into the etched pores by γ-ray-induced graft polymerization. We found that the membranes possessed one-dimensional straight proton conducting pathways parallel to the ion-beam incident axis. Such restricted structures probably led to less water uptake and lower methanol permeability compared to a commercially-available Nafion membrane.
