Abstract
Whereas harsh environmental wastewater purification and polluted air filtration is eagerly desired, traditional membranes cannot meet such demands due to its poor chemical/thermal resistance which remains a great challenge. Herein, a harsh environmental-tolerant zeolitic imidazolate frameworks (ZIF-8) @polyphenylene sulfide (PPS) membrane with tunable hierarchical structure for efficient oil/water separation and air filtration under extreme conditions was proposed. Highly robust and flexible biomimetic ZIF-8@PPS membrane with lotus-leaf papillary structure was successfully developed via large-scale melt-blown PPS nonwovens followed by in-situ growth porous ZIF-8. The biomimetic ZIF-8@PPS membrane truly combining the advantages of special polymeric PPS and inorganic zeolite for harsh environmental wastewater and air treatment, which exhibits smart switchable super-oleophobic/hydrophobic characteristic and PM2.5 purification performance under harsh water/oil mixture (strong acid/alkali) and high temperature (exceed 200 °C) conditions. The biomimetic ZIF-8@PPS membrane exhibits extremely high flux (28569.4 L m-2 h-1) and separation efficiency (99.932%) for oil/water separation, and excellent filtration efficiency (99.5%) for PM2.5 removal. Impressively, the robust and flexible ZIF-8@PPS membrane with strong chemical/thermal resistance could still maintain excellent separation/filtration performance even after numerous cyclic tests under harsh environments. The harsh environmental tolerant ZIF-8@PPS membrane with large-scale roll-to-roll production ability holds great promise for environmental protection under extreme conditions.
Published Version
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