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Chemical Engineering Journal

Chemical Engineering Journal

IF: 13.3
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3D-printed flexible thermoplastic polyurethane membrane for ultrafast oil/water separation

Published:12 December 2024 DOI: 10.1016/j.cej.2024.158500
Junpeng Zhang, Yingying Li, Bin He, Tao Zhang, Bingqian Yang, Wenzheng Yu, Ligang Hu, Guibin Jiang

Abstract

The purification of oily wastewater from diverse industries emerges as a critical solution to alleviate the existing freshwater crisis. Advanced oil–water separation techniques, including membrane separation, have garnered significant attention for their high efficiency, low energy consumption, and ease of maintenance. Notably, the integration of superhydrophobic surfaces in membrane fabrication has shown promise in enhancing separation performance. However, conventional methods often fail to ensure long-term wear resistance and scalability, necessitating innovative strategies for membrane preparation. In this context, 3D printing technology, particularly selective laser sintering (SLS), presents a novel approach for the tailored production of hydrophobic membranes. By leveraging the inherent properties of thermoplastic polyurethane (TPU) and thermoplastic elastomers (TPE), untreated polymer powders can be directly sintered into intricate porous structures with micro-nano rough surfaces, exhibiting superior oil–water separation capabilities. The fabricated 3D-printed membranes demonstrate exceptional hydrophobicity and oleophilicity, coupled with robust chemical, environmental, and mechanical properties and high separation efficiency (>99.3?%) at an impressive separation flux of 3.23?×?105 L·m?2·h?1 under gravity-driven conditions. Furthermore, the eco-friendly nature and scalability of this approach hold promise for large-scale implementation, signaling a significant step towards sustainable environmental development.

Substances (12)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Dichloromethane 75-09-2 CH2Cl2 1289 suppliers $8660.00
Sodium chloride 7647-14-5 ClNa 1215 suppliers $5.00-$6678.62
Sodium hydroxide 1310-73-2 NaOH 1210 suppliers $14.00-$16472.00
Hexane 110-54-3 C6H14 846 suppliers $20.00-$5500.00
Cyclohexane 110-82-7 C6H12 806 suppliers $10.00-$8580.00
Ethanol 64-17-5 C2H6O 805 suppliers $10.00-$17310.00
Span 80 1338-43-8 C24H44O6 542 suppliers $5.00-$497.42
Methylene Blue 61-73-4 C16H18ClN3S 390 suppliers $5.00-$3070.00
Solvent Red 27 1320-06-5 C26H24N4O 272 suppliers $15.00-$506.00
SUNFLOWER SEED OIL 8001-21-6 NULL 169 suppliers $60.90-$6452.29

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