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- W3215092811 abstract "Metal-organic frameworks (MOFs) are considered emerging materials as they further improve the various properties of polymer membranes used in energy applications, ranging from electrochemical storage and purification of hydrogen to proton exchange membrane fuel cells. Herein, we fabricate composite membranes consisting of polybenzimidazole (PBI) polymer as a matrix and MOFs as filler. Synthesis of ZIF-8 and UiO-66 MOFs are conducted through a typical solvothermal method, and composite membranes are fabricated with different MOF compositions (e.g., 2.5, 5.0, 7.5, and 10.0 wt %). We report a significant improvement in proton conductivity compared with the pristine PBI; for example, more than a three-fold increase in conductivity is observed when the PBI-UiO66 (10.0 wt %) and PBI-ZIF8 (10.0 wt %) membranes are tested at 160 °C. Proton conductivities of the composite membranes vary between 0.225 and 0.316 S cm −1 at 140 and 160 °C. For the comparison, pure PBI exhibits 0.060 S cm −1 at 140 °C and 0.083 S cm −1 at 160 °C. However, we also report a decrease in permeability and mechanical stability with the composite membranes. • ZIF-8 and UiO-66 MOFs are successfully synthesized and characterized. • PBI-ZIF8 and PBI-UiO66 membranes with four different loadings are fabricated. • PBI-MOF membranes can provide more than a three-fold increase in proton conductivity. • An increase in MOF amount may cause agglomeration and decrease mechanical stability." @default.
- W3215092811 created "2021-12-06" @default.
- W3215092811 creator A5059255603 @default.
- W3215092811 creator A5064857781 @default.
- W3215092811 creator A5077338811 @default.
- W3215092811 date "2022-05-01" @default.
- W3215092811 modified "2023-10-17" @default.
- W3215092811 title "Preparation of polybenzimidazole/ZIF-8 and polybenzimidazole/UiO-66 composite membranes with enhanced proton conductivity" @default.
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- W3215092811 doi "https://doi.org/10.1016/j.ijhydene.2021.11.045" @default.
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