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SPAEK-based binary blends and ternary composites as proton exchange membranes for DMFCs
Binary blends and ternary composites as proton exchange membranes
; Zhu, Ming
; Song, Yang
; Hu, Wei
; Li, Xuefeng
; Jiang, Zhenhua
; Guiver, Michael D.
NRC Institute for Chemical Process and Environmental Technology; National Research Council Canada
Journal of Membrane Science
Poly(aryl ether ketone); Protonexchangemembranes; Composites; Sol–gel, Fuel cells
Naphthalene-containing blendmembranes, comprising sulfonated polyaryletherketone (SPAEK) as the primary matrix, and basic component polyazomethine (PAM), which has a chemical structure partially similar with SPAEK, were investigated as protonexchangemembranes (PEMs). Further, a ternary-compositemembrane was successfully prepared by introducing acid-functionalized polysilsesquioxane (POSS–SO3H) into SPAEK/PAM composite using a sol–gel process. The relevant properties of the PEMs, such as proton conductivity, methanol permeability, water uptake, and morphology were determined, and it was shown that the ternary-compositemembrane, SPAEK/PAM/POSS–SO3H, showed a superior combination of properties for proton conductivity and methanol resistance. Its selectivity was 7.5 times higher than Nafion.