Preparation of Crosslinked Sulfonated Polyimide Membrane with High Proton Conductivity and Application to Fuel Cell

抄録

The crosslinked sulfonated polyimides with different sulfonation degree by a sulfonated diamine were prepared by polycondensation reaction in m-cresol using various crosslinkers with various chain length. The preparation of crosslinked sulfonated polyimides was characterized and confirmed by NMR and FT-IR. Each sulfonated polyimide membranes were investigated by ion exchange capacity, methanol permeability, water vapor sorption, water uptake, and proton conductivity to observe the effect of crosslinkers having different chain length.