Advanced Functional Materials· 2026Q1
Piezoelectric Hydrogel Membranes Enabling Hydraulically Self‐Regulated Active‐Passive Antifouling for Oil‐Water Separation
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- Q1SCImago
- 2026year
Short summary
A novel MoS2/PVA/BaTiO3/MFC membrane achieves over 99.28% oil-water separation efficiency and self-regulates active antifouling using intrinsic hydraulic pressure to generate a piezopotential that detaches oil droplets.
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Key points
- Engineered a MoS2/PVA/BaTiO3/MFC membrane for synergistic active-passive antifouling.
- Passive antifouling achieved via MoS2/PVA hydrogel, reducing oil adhesion to 0.73 µN and enabling >99.28% separation efficiency.
- Piezoelectric components (BaTiO3, MoS2) convert 0.1 bar hydraulic pressure into -130 to -160 mV piezopotential.
- Generated piezopotential creates electrostatic and dielectrophoretic forces for active detachment of oil droplets and surfactants.
AI-generated from the title and abstract; the full text is not read.
Abstract
ABSTRACT Membrane fouling caused by the diffusion and adsorption of oil droplets during oil‐water separation severely hinders the long‐term operation of membrane modules, highlighting the imperative for innovative membrane fouling mitigation strategies. Herein, a molybdenum disulfide/polyvinyl alcohol/barium titanate/microfibrillated cellulose (MoS 2 /PVA/BaTiO 3 /MFC, MPBM) membrane was engineered for active‐passive synergistic antifouling during emulsion separation. As a passive antifouling strategy, membrane surface functionalization with a MoS 2 /PVA hydrogel constructs a dense hydration barrier, which reduces underwater crude oil adhesion to 0.73 µN and enables a separation efficiency exceeding 99.28% for different emulsions. The incorporation of piezoelectric components (BaTiO 3 and MoS 2 ) endows the MPBM membrane with great electromechanical conversion capability and active antifouling performance. Notably, during emulsion separation, the intrinsic pulsed hydraulic pressure (0.1 bar) triggers a piezopotential of −130 to −160 mV across the membrane. Based on the piezoelectric effect, a dynamically coupled force field combining electrostatic and dielectrophoretic forces is constructed, enabling the simultaneous active detachment of anionic surfactants and oil droplets from membrane pores. This work provides an energy‐saving and effective solution for the sustainable separation of oil‐in‐water (O/W) emulsions, offering valuable insights for advancing active‐passive synergistic antifouling technologies in membrane‐based wastewater remediation.
The authors' abstract, as published at the source. Advanced Functional Materials, 2026 · DOI ↗
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Field: Surfaces, Coatings and Films
Surfaces, Coatings and FilmsMaterials Science