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Plasma-Induced amphiphilic modification of PVDF membranes for
enhanced protein anti-fouling and emulsified oil separation

Authors： JIANG Haozhe, LI Ru, CHEN Pan， LI Pan

Units： School of Environmental and Chemical Engineering, Xi’an Engineering University, Xi’an 710600,China

KeyWords： PVDF membrane; plasma grafting; amphiphilic; anti-fouling separation performance

ClassificationCode：TQ028.4＋6

year,volume(issue):pagination： 2025,45(6):91-97

Abstract：

Polyvinylidene fluoride(PVDF) microporous membranes often experience surface and pore fouling during operation due to their inherent hydrophobicity. In this study, plasma activation was employed to introduce an amphiphilic polymer coating onto the membrane surface through grafting reactions, resulting in plasma-modified membranes. The anti-fouling separation performance of the modified membranes was systematically investigated. Results indicated that, compared with the original membrane’s contact angle of 100°, the water droplet spread out completely on the surface of the modified membrane within 1 s, demonstrating significantly enhanced hydrophilicity. During the filtration of bovine serum albumin (BSA) solution, the flux decay rate decreased from 40.4% to 5.1%, while the retention rate increased from 67.8% to 98.7%. Furthermore, in oil-water separation experiments, the stable filtrate flux increased from 78.9 L/(m2·h) to 217.0 L/(m2·h). Over 10 days of continuous operation, the separation efficiency remained consistently above 99.9%, with the oil content in the filtrate maintained below 50.0 mg/L .Evidently,plasma-assisted amphiphilic modification allows the membrane to maintain stable and superior anti-fouling separation performance during long-term use without altering its structural morphology.

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AuthorIntro：

江浩喆（2000-），男，江西鹰潭人，硕士研究生，主要研究方向为等离子体处理膜材料.

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