Enhanced properties of sulfonated polyether ether ketone proton exchange membrane by incorporating carboxylic-contained zeolitic imidazolate frameworks
New Journal of Chemistry Pub Date: 2020-07-20 DOI: 10.1039/D0NJ02532A
Abstract
Carboxylic contained zeolitic imidazolate frameworks (ZIF-COOH) were designed and synthesized using 1H-Imidazole-2-carboxylic acid and Zn(NO3)2·6H2O. The ZIF-COOH was then applied in the fabrication of composite membranes with sulfonated polyether ether ketone (SPEEK) (SPEEK/ZIF-COOH). The properties of the composite membranes, including mechanical strength, proton conductivity, and methanol permeability were studied. The incorporation of ZIF-COOH generated a significant effect on SPEEK/ZIF-COOH composite membranes, due to the special structure and compositional characteristics of ZIF-COOH. In particular, the tensile strength of SPEEK/ZIF-COOH-5 showed an enhancement of 44.1 MPa, which was 42% higher than the pristine SPEEK. Simultaneously, the proton conductivity displayed an improvement of 46% as compared to the SPEEK. Most importantly, the methanol permeability values decreased to 1.1 × 10?7 cm2 s?1, which was only a tenth of the value of SPEEK.
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Journal Name：New Journal of Chemistry
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CAS no.: 89640-58-4
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