UiO‐66‐NH₂ anchored sulfonated polyphenylene sulfide proton exchange membrane with high proton conductivity and low methanol permeability

This study loaded different amounts of UiO‐66‐NH 2 onto sulfonated polyphenylene sulfide fibers (SPPS), successfully loading UiO‐66‐NH 2 on SPPS fibers confirmed by energy dispersive x‐ray spectroscopy, x‐ray diffraction, and Fourier transform infrared spectroscopy. The UiO‐66‐NH 2 ‐X@SFM were then impregnated in Nafion solution to obtain UiO‐66‐NH 2 ‐X@SFM/Nafion composite membranes. The thermal stability, dimensional stability, mechanical properties, proton conductivity, methanol resistance, and other properties of the UiO‐66‐NH 2 ‐X@SFM/Nafion composite membranes were subsequently comprehensively characterized. The proton conductivity of the UiO‐66‐NH 2 ‐8@SFM/Nafion composite membrane at 80°C and 100% RH was measured to be 0.286 S cm −1 , which exhibited a significant enhancement of 1.75 times compared with the original membrane. Simultaneously, the composite membrane demonstrated a remarkable reduction in methanol permeation rate. At 40°C and 100% RH, the UiO‐66‐NH 2 ‐8@SFM/Nafion composite membrane has a selectivity of up to 20.7 × 10 4 S s cm −3 and a single cell density of 88.3 m W cm −2 at 60°C and 100% RH.