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<p>In recent years, the development of advanced membrane technologies to overcome the permeability-selectivity trade-off in water treatment have garnered significant attention. This study demonstrates a synergistic strategy for fabricating of macrovoid-free mixed matrix membranes (MMMs) through non-solvent-induced phase separation (NIPS). We incorporated a synergistic nanohybrid of polydopamine (PDA) and sulfobetaine methacrylate (SBMA) functionalized graphene oxide (GO) into a hydrophobic polysulfone (PSF) matrix, with polyvinyl pyrrolidone (PVP) serving as an additive. The incorporation of 0.5 wt% SBMA-PDA-GO nanosheets yielded remarkable results with a pure water flux of 358.6 L m⁻<sup>2</sup> h⁻<sup>1</sup>, a tensile strength of 7.7 MPa, a retention rates of 90.1% for bovine serum albumin (BSA) and 93.3% for humic acid (HA) as well as flux recovery rates of 67.0% and 75.3%, respectively. Comparative analysis with the pristine PSF membrane revealed that the modified MMMs exhibited simultaneously enhanced permeability, selectivity, mechanical strength, and antifouling properties. These improvements confirm that the novel membrane effectively addresses the permeability-selectivity trade-off, positioning it as a promising candidate for wastewater treatment applications.</p>

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Fabrication of polysulfone membranes with polydopamine and sulfobetaine methacrylate functionalized graphene oxide nanoparticles

  • 期刊论文

  • 发表日期：

    2025年10月17日

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  • Zhou Yuanyuan,
  • Li Panying,
  • Zhao Yingying,
  • Zhang Mingjie,
  • Yang Kaihao

摘要

In recent years, the development of advanced membrane technologies to overcome the permeability-selectivity trade-off in water treatment have garnered significant attention. This study demonstrates a synergistic strategy for fabricating of macrovoid-free mixed matrix membranes (MMMs) through non-solvent-induced phase separation (NIPS). We incorporated a synergistic nanohybrid of polydopamine (PDA) and sulfobetaine methacrylate (SBMA) functionalized graphene oxide (GO) into a hydrophobic polysulfone (PSF) matrix, with polyvinyl pyrrolidone (PVP) serving as an additive. The incorporation of 0.5 wt% SBMA-PDA-GO nanosheets yielded remarkable results with a pure water flux of 358.6 L m⁻2 h⁻1, a tensile strength of 7.7 MPa, a retention rates of 90.1% for bovine serum albumin (BSA) and 93.3% for humic acid (HA) as well as flux recovery rates of 67.0% and 75.3%, respectively. Comparative analysis with the pristine PSF membrane revealed that the modified MMMs exhibited simultaneously enhanced permeability, selectivity, mechanical strength, and antifouling properties. These improvements confirm that the novel membrane effectively addresses the permeability-selectivity trade-off, positioning it as a promising candidate for wastewater treatment applications.