| 초록 |
Sulfonated poly(arylene ether sulfone) copolymers were synthesized via nucleophilic step polymerization of phenolphthalin (PP), sulfonated 4,4’-dichlorodiphenyl sulfone (S-DCDPS) and 4,4’-dichlorodiphenyl sulfone (DCDPS) as electrolyte membrane. The copolymer was blended with various amounts of SiO2-ZrO2 binary oxides with different Si/Zr molar ratio to form organic/inorganic composite membranes. Thin, ductile films were fabricated by solution casting method and the thickness was about 50 micron. The membranes were measured by water uptake, proton conductivityas functions of degree of sulfonation and Si/Zr molar ratio of the binary oxides. In general the water uptake and proton conductivity increased as the degree of sulfonation increased from 20 to 60 mol%. The composite membranes showedgood chemical and mechanical stabilities at tested conditions.The water uptake of composite membranes containing 10 %(w/w) inorganic contents had a 2 % increase compared to the pure membranes and the proton conductivities of composite membranes were slightly higher thanpure membranes. |
