Abstract:

The sulfonated poly(aryle ether ketone sulfone) with different sulfonation degree containing amino copolymers were prepared by polycondensation method. The FTIR and ¹H NMR spectra of amino membrane-sulfonated poly(aryle ether ketone sulfone)(Am-SPAEKS) show that the amino groups are introduced into SPAEKS copolymers. The measured results show that the thermal stability, dimensional stability, resistance methanol performance and proton conductivities of Am-SPAEKS membranes are improved due to the introduction of amino groups. The proton conductivity of Am-SPAEKS-1 membrane reaches 0.0894 S/cm at 80℃. The methanol permeability coefficient of Am-SPAEKS-1 membrane is only 0.24×10^-6 cm²/s, which is lower than that of pure SPAEKS(0.87×10^-6 cm²/s) membrane and Nafion(2×10^-6 cm²/s) membrane. All the results indicate that the Am-SPAEKS membranes are promising as proton exchange membranes for middle-high temperature proton exchange membrane fuel cells applications and direct methanol fuel cells(DMFCs).

Key words: Amino, Sulfonated poly(aryle ether ketone sulfone), Proton conductivity, Proton exchange membrane