| 초록 |
Surface modification of sulfonated poly(phenylene sulfide sulfone nitrile)(SPSSN) membrane was investigated by using direct fluorination. Novel SPSSN has been designed and synthesized as an electrolyte membrane. The introduction of S- linkages was intended to increase the hydrolytic and oxidative stability while CN- groups were added to reduce the water uptake(WU) by the polar-polar interaction. Surface fluorination treatments convert some C-H into C-F bonds on membrane surface. These membranes exhibited high proton conductivity, high dimensional stability and low methanol permeability. Furthermore, this surface enrichment of fluorine atoms led to low interfacial resistance between membrane and catalyst layer with Nafion® ionomer. Thus, surface fluorinated SPSSN membranes are expected to improve single cell performance. |
