Self-assembled polymeric nanosheet-anchored nanofiber membrane for emulsion separation

He Li, Keyi Che, Fei Yin, Jingfang Liu, Pan Jiang, Liu Liu, Zhaoling Li, Bin Ding, Jianyong Yu () and Shichao Zhang ()
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He Li: Donghua University
Keyi Che: Donghua University
Fei Yin: Donghua University
Jingfang Liu: Donghua University
Pan Jiang: Donghua University
Liu Liu: Donghua University
Zhaoling Li: Donghua University
Bin Ding: Donghua University
Jianyong Yu: Donghua University
Shichao Zhang: Donghua University

Nature Communications, 2025, vol. 16, issue 1, 1-9

Abstract: Abstract High-performance water-oil separation materials are essential to reduce environmental pollution and improve resource utilization towards achieving carbon neutrality; however, most present separation materials are limited by the monotonous pore structure and uncontrollable interface, resulting in low separation efficiency and flux. Here, we develop a facile electrohydrodynamic strategy, based on the electrospray-sheeting technique, to create self-assembled polymeric nanosheet-anchored nanofiber membranes, for high-performance emulsion separation. By manipulating relative humidity to fabricate stem-like nanofibers and regulating their topological structure to control the resulting microelectric field, polymer-charged droplets are induced to deform and then innovatively assemble into leaf-like nanosheets anchored on the nanofibers, thereby constructing the membrane with hierarchical stem-leaf-like nanoarchitecture. The nanoarchitecture with superwettable pore channels enables the obtained membrane to simultaneously achieve striking separation efficiency (>99.32%) and flux (up to 4179 L m−2 h−1) for water-in-oil emulsions, all attributed to its supercapillary and demulsification-interception effects. This work may provide a distinctive platform for the development of advanced nanomaterials for filtration and purification.

Date: 2025
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DOI: 10.1038/s41467-025-64958-y

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