Preparation of PVDF/PAN-f/PDA Composite Membrane and Study on its Photothermal Water Evaporation Performance

LI Xiaomei, JIANG Minghang, ZHANG Jun, LIU Yan

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PDF(1955 KB)
Plastics Science and Technology ›› 2025, Vol. 53 ›› Issue (03) : 54-58. DOI: 10.15925/j.cnki.issn1005-3360.2025.03.010
Theory and Research

Preparation of PVDF/PAN-f/PDA Composite Membrane and Study on its Photothermal Water Evaporation Performance

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Abstract

Polyacrylonitrile fibers (PAN-f) were loaded onto the surface of polyvinylidene fluoride (PVDF) membranes, followed by the deposition of polydopamine (PDA) on the surface to fabricate PVDF/PAN-f/PDA composite photothermal evaporation membranes. The water evaporation performance and photothermal water purification capabilities of these membranes were investigated. The results indicated that the incorporation of polyacrylonitrile (PAN) enhanced the hydrophilicity of the composite film and provides more water transport channels. The PVDF/PAN-f/PDA-0.4 membrane exhibited the highest photothermal evaporation performance, reaching 2.26 kg/m2, and maintained excellent performance even after 10 cycles. For different types of polluted water solutions, the PVDF/PAN-f/PDA-0.4 membrane demonstrated outstanding photothermal purification capabilities, with evaporation rates remaining above 2.0 kg/m2 and stable performance over long-term operation. Therefore, the PVDF/PAN-f/PDA-0.4 membrane can be effectively used for photothermal wastewater purification applications.

Key words

PVDF / PDA / PAN / Photothermal effect / Sewage purification

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LI Xiaomei , JIANG Minghang , ZHANG Jun , et al. Preparation of PVDF/PAN-f/PDA Composite Membrane and Study on its Photothermal Water Evaporation Performance. Plastics Science and Technology. 2025, 53(03): 54-58 https://doi.org/10.15925/j.cnki.issn1005-3360.2025.03.010

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