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<p>Electrospun nanofiber membranes (ENMs) exhibit high porosity, high specific surface area, and a distinctive interconnected structure. In this study, composite membranes were prepared by electrospinning. After hot pressing hybrid ENMs consisting of poly(vinylidene difluoride) (PVDF) as a thermoplastic polymer and polyacrylonitrile (PAN) as a skeleton polymer, the PVDF nanofibers can be partially melted, softened, or fractured, causing nanofibers to conglomerate or fuse. The connections between membrane properties and filtration performances have been thoroughly studied. To adjust membrane porosity, the hot pressing method was used at different temperatures (60<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(^{\circ }\)</EquationSource> </InlineEquation> and&#xa0;140<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(^{\circ }\)</EquationSource> </InlineEquation>) for the same pressure and hold time. Water permeability tests showed that these membranes had adequate transport properties for filtration applications, with the membranes that were processed at&#xa0;60<InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(^{\circ }\)</EquationSource> </InlineEquation> exhibiting high values of pure water flux <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\left[ &gt; {420}{\text {L}/(\text {m}^{2}\,\text {h})}\right] \)</EquationSource> </InlineEquation>. Membrane surfaces were then functionalized with antimicrobial properties via soaking in solutions of silver nitrate, which were confirmed through techniques of disk diffusion and surface scanning. Results indicated that the nanofiber membranes that were decorated with silver nanoparticles (AgNPs) suppressed the growth of bacterial colonies. This study presented a cost-effective and convenient approach for creating antimicrobial nanofiber membranes that are especially beneficial for the filtration of water. With their exceptional permeability and disinfection effectiveness, these membranes provide an innovative solution ensuring a cleaner and safer water access for future generations.</p>

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Investigation of membranes for water treatment using hot pressed electrospun nanofibers with antimicrobial properties

  • 期刊论文

  • 发表日期：

    2026年5月20日

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  • Maryam Amouamouha,
  • Zhipeng Liang,
  • Cory D. Stone,
  • Hao Fong,
  • David R. Salem,
  • Travis W. Walker

摘要

Electrospun nanofiber membranes (ENMs) exhibit high porosity, high specific surface area, and a distinctive interconnected structure. In this study, composite membranes were prepared by electrospinning. After hot pressing hybrid ENMs consisting of poly(vinylidene difluoride) (PVDF) as a thermoplastic polymer and polyacrylonitrile (PAN) as a skeleton polymer, the PVDF nanofibers can be partially melted, softened, or fractured, causing nanofibers to conglomerate or fuse. The connections between membrane properties and filtration performances have been thoroughly studied. To adjust membrane porosity, the hot pressing method was used at different temperatures (60 \(^{\circ }\) and 140 \(^{\circ }\) ) for the same pressure and hold time. Water permeability tests showed that these membranes had adequate transport properties for filtration applications, with the membranes that were processed at 60 \(^{\circ }\) exhibiting high values of pure water flux \(\left[ > {420}{\text {L}/(\text {m}^{2}\,\text {h})}\right] \) . Membrane surfaces were then functionalized with antimicrobial properties via soaking in solutions of silver nitrate, which were confirmed through techniques of disk diffusion and surface scanning. Results indicated that the nanofiber membranes that were decorated with silver nanoparticles (AgNPs) suppressed the growth of bacterial colonies. This study presented a cost-effective and convenient approach for creating antimicrobial nanofiber membranes that are especially beneficial for the filtration of water. With their exceptional permeability and disinfection effectiveness, these membranes provide an innovative solution ensuring a cleaner and safer water access for future generations.