Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
638535 | Journal of Membrane Science | 2007 | 9 Pages |
Abstract
Polymer blend membranes composed of a proton conducting component and a methanol barrier component were prepared for direct methanol fuel cells. Sulfonated poly(arylene ether sulfone) copolymer with 60Â mol% sulfonation (sPAES-60) was synthesized via a poly-condensation reaction from 3,3â²-disulfonated-4,4â²-dichlorodiphenyl sulfone (SDCDPS), 4,4â²-dichlorodiphenyl sulfone (DCDPS), and 4,4â²-biphenol (BP) for the proton conducting component. Poly(ether) sulfone copolymer (RH-2000, Solvay) was used to compensate for the mechanical and chemical weakness of sPAES-60 and to reduce the methanol permeability. By varying the drying condition and the concentration of the casting solution (10, 15, 20Â wt%), blend membranes having various phase separated morphologies were obtained. The morphology was characterized by SEM, EDAX, and AFM. In this paper, the effect of the drying conditions on the phase separation and morphology of the blend membranes was investigated.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Dong Hwee Kim, Jisu Choi, Young Taik Hong, Sung Chul Kim,