Abstract
A series of cross-linked hybrid membranes with low water uptake, high dimensional stabilities, as well as high oxidative stabilities are prepared by a combination of silane-crosslinking and thiol-ene click chemistry based on a sulfonated poly (arylene ether ketone) (SPAEK) with propenyl groups. 1H NMR measurement and Fourier transform infrared spectroscopy are used to characterize and confirm the chemical structure of SPAEK and its cross-linked hybrid polymer exchange membranes. We also investigate the changes in methanol permeability, proton conductivity and mechanical properties. Our findings demonstrate that the Si–O–Si cross-linked structure makes a great contribution to the improvement of dimensional and chemical stabilities. Therefore, these cross-linked hybrid membranes could be considered as promising materials for direct methanol fuel cell applications.
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