Abstract:A series of thioether cross-linked membranes based on sulfonated poly(arylene ether ketone)s containing propenyl groups were prepared to solve the problem of high methanol permeability for proton electrolyte membrane in direct methanol fuel cells (DMFCs). For this purpose, 4,4′-thiobisbenzenethiol was selected as cross-linker, and the cross-linked structure was formed via thiol-ene click chemical reaction between propenyl and thiol groups. Compared with pristine membrane, the thioether cross-linked membranes e… Show more
“…To overcome these issues, numerous sulfonated aromatic hydrocarbon polymers have been developed as alternative PEMs. These sulfonated aromatic hydrocarbon polymers include sulfonated poly (arylene ether ketone)s [17,18], sulfonated poly(benzimidazoles) [19,20,21], sulfonated poly (arylene ether sulfone)s [22,23,24], sulfonated poly(aryl ether nitrile)s [25,26,27] and sulfonated polyimides [28,29,30].…”
In order to investigate the effect of crosslinking degree on the water uptake, swelling ratio, and methanol permeability of sulfonated poly(aryl ether nitrile)s (SPENs), the molar content of sulfonated group in bisphenol monomer is fixed at 60% in this work. The properties of sulfonated poly (aryl ether nitrile) with different crosslinking degrees are studied by changing the content of propenyl group in sulfonated poly (aryl ether nitrile)s. The cross-linking reaction of the propenyl groups in the SPENs is cured at 230 °C. All the results show that this method is an effective way to improve the water uptake, swelling ratio, and methanol permeability to meet the application requirements of the SPENs membranes as proton exchange membranes in fuel cells.
“…To overcome these issues, numerous sulfonated aromatic hydrocarbon polymers have been developed as alternative PEMs. These sulfonated aromatic hydrocarbon polymers include sulfonated poly (arylene ether ketone)s [17,18], sulfonated poly(benzimidazoles) [19,20,21], sulfonated poly (arylene ether sulfone)s [22,23,24], sulfonated poly(aryl ether nitrile)s [25,26,27] and sulfonated polyimides [28,29,30].…”
In order to investigate the effect of crosslinking degree on the water uptake, swelling ratio, and methanol permeability of sulfonated poly(aryl ether nitrile)s (SPENs), the molar content of sulfonated group in bisphenol monomer is fixed at 60% in this work. The properties of sulfonated poly (aryl ether nitrile) with different crosslinking degrees are studied by changing the content of propenyl group in sulfonated poly (aryl ether nitrile)s. The cross-linking reaction of the propenyl groups in the SPENs is cured at 230 °C. All the results show that this method is an effective way to improve the water uptake, swelling ratio, and methanol permeability to meet the application requirements of the SPENs membranes as proton exchange membranes in fuel cells.
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