Journal
POLYMERS FOR ADVANCED TECHNOLOGIES
Volume 31, Issue 5, Pages 1007-1018Publisher
WILEY
DOI: 10.1002/pat.4835
Keywords
hexagonal boron nitride; oil/water emulsion separation; poly(arylene ether nitrile); stability; superhydrophilic/underwater superoleophobic property
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Funding
- China Postdoctoral Science Foundation [2017M622999, 2019T120823]
- Scientific Research Starting Project of SWPU [2017QHZ014]
- Sichuan Province Sci-Tech Supported Project [2018062]
- National Natural Science Foundation of China [51903215]
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Oil/water emulsion separation in harsh environments remains a big challenge. Herein, a double layered nanofibrous composite membrane was developed by assembly of polydopamine-modified hexagonal boron nitride (h-BN-PDA) onto a poly(arylene ether nitrile) (PEN) nanofibrous mat. Owing to the synergistic effect of a h-BN-PDA skin layer and a PEN nanofibrous mat supporting layer, as-prepared composite membrane exhibited high thermal stability, corrosion resistance, and superhydrophilic/underwater superoleophobic property. Consequently, the PEN composite membrane showed good antifouling performance and a high rejection ratio (>99.0%) for various oil/water emulsions. After 10 cycles, the separation flux of PEN composite membrane still reached 588.1 L/m(2) h under the operating pressure of 0.04 MPa. Furthermore, the PEN composite membrane could still achieve high separation efficiency and high flux in high-temperature (65 degrees C) and strongly corrosive conditions (pH = 1-13). Therefore, the stable and efficient h-BN-PDA/PEN composite membrane showed potential application for treating oily wastewater in harsh environments.
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