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- W2078079663 abstract "A new approach for noticeably improving the DMFC membrane transport properties of sulfonated poly(arylene ether sulfone) copolymers (SPAES) has been demonstrated, which is based on controlling the water-channel structure and the state of water by in situ hybridization of ORMOSIL (Organically Modified SILicates). Diethoxydimethylsilane (DEDMS) was employed as a functional ORMOSIL precursor. Its hydrophobic nature made it possible to adjust the hydrophilicity of the resulting hybrid membranes. An increase of DEDMS uptake into SPAES membranes allowed the water uptake to decrease and the water channels to become narrow and tortuous. The influence of DEDMS uptake on the state of water was investigated by measuring the characteristic melting peak of water at 0 °C. Based on this investigation, the dependence of water uptake on the state of water was quantitatively identified. A noteworthy observation is that the incorporation of DEDMS into SPAES was effective in suppressing the methanol crossover with slightly sacrificing the proton conductivity, resulting in the higher selectivity. This improvement in DFMC membrane transport properties was discussed in terms of the water-channel structure and the state of water." @default.
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- W2078079663 date "2010-01-01" @default.
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- W2078079663 title "Control of water-channel structure and state of water in sulfonated poly(arylene ether sulfone)/diethoxydimethylsilane in situ hybridized proton conductors and its influence on transport properties for DMFC membranes" @default.
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- W2078079663 doi "https://doi.org/10.1016/j.memsci.2009.09.029" @default.
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