Asymmetric Wetting Membrane Based on Oriented Multichannel Fiber Bundles and Hydrovoltaic Effect for Simultaneous Oil Collection and Self‐Powered Monitoring

ABSTRACT In this work, the asymmetric wetting composite membrane (CMoP@CPT) based on carbonized/modified fiber bundles and the photovoltaic effect was fabricated to address the challenges of material clogging and lack of process monitoring in oil pollution remediation. The upper layer (CMoP) consisted of molybdenum disulfide/ polydimethylsiloxane‐modified (MoS 2 /PDMS) carbonized fiber bundles exhibiting oleophilic and hydrophobic properties. Its surface‐oriented multi‐channel structure enabled rapid oil conduction, achieving a tetradecane flux of 3038.00 L m − 2 h − 1 and an adsorption capacity of 5.40 g g − 1 . The lower layer (CPT) was prepared from polyethyleneimine/fluoropolymer‐modified (PEI/PS‐60) cellulose and carbon nanotubes (CNTs), exhibiting oleophobic and hydrophilic properties. When CMoP failed and moisture penetrated, the CPT layer generated a monitoring voltage of ≥ 160 mV due to the charge difference between wet and dry zones, enabling real‐time early warning of membrane performance degradation. Moreover, the efficient photothermal conversion efficiency of the CMoP@CPT not only accelerated the transport rate of oil contaminants but also created conditions for generating asymmetric wettability for power generation. This membrane integrates highly efficient oil collection with self‐powered monitoring, providing a novel approach to intelligent oil collection systems.