부산대학교 도서관

Proton conducting composite membranes have been prepared via binary mixtures comprising sulfonated polysulfone (SPSU) and natural zeolite (NZ). Polysulfone has been sulfonated in 1, 2-dichloroethane using the homogeneous method with trimethylsilyl chlorosulfonate as sulfonating agent. The ratio of monomer mol and trimethylsilyl chlorosulfonate was 1:1.5. Natural zeolite was activated in 1 M phosphoric acid and calcinated at 500°C for 4 hours. The sulfonated polysulfone was added with zeolite at mass ratios of 1:0.5, 1:1 and 1:1.5. The manufacture of composite membranes has been done by evaporating dimethyl formamide of each mass ratios. The composite membranes were characterized by FT-IR, XRD analysis, and conductivity (σ). From the results of FT-IR spectra showed that interaction between sulfonated polysulfone and natural zeolite. From diffractogram showed that the diffractogram pattern after being blend with zeolite, the presence of crystal phase between 20-30° at 2θ. From the conductivity, the maximum proton conductivity was measured as 7.15 x 10-4 S/cm at 40°C for mass ratios of 1: 0.5 and results, as well as literature data the possible proton conductivity mechanism of the membrane, has been modeled. [ABSTRACT FROM AUTHOR]