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<p>The application of oil-water separation membranes is hindered by their poor thermal stability, limited permeability, and complex production processes. To overcome these limitations, this study developed a novel modified membrane by depositing GO@SiO<sub>2</sub> onto nylon microporous membranes using a facile one-step vacuum filtration method. The prepared membrane exhibited both superhydrophilicity and underwater superoleophobicity. Experimental results demonstrated that the membrane achieved high separation efficiency (&gt; 99%), exceptional water flux (3015.8&#xa0;L∙m<sup>− 2</sup>∙h<sup>− 1</sup>), and excellent antifouling properties (Oil Contact Angle <sub>max</sub>= 152°, low oil adhesion) for water-in-oil emulsions. Moreover, the membrane exhibited outstanding flame retardancy (LOI<sub>max</sub>=29%) and superior thermal stability. It showed higher thermal decomposition temperatures and significantly slower weight loss rates. This modified GO@SiO<sub>2</sub> membrane showed great potential for the industrial-scale treatment of oil-in-water emulsions. Importantly, the flame-retardant properties also made the membrane a promising candidate for offshore oil spill fire remediation.</p>

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Flame-retardant GO@SiO2 modified oil-water separation membranes with superhydrophilic and underwater superoleophobic properties

  • 期刊论文

  • 发表日期：

    2026年3月27日

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  • Hong Ji,
  • Ruiqi Wang,
  • Song Zheng,
  • Ke Yang,
  • Zhixiang Xing

摘要

The application of oil-water separation membranes is hindered by their poor thermal stability, limited permeability, and complex production processes. To overcome these limitations, this study developed a novel modified membrane by depositing GO@SiO2 onto nylon microporous membranes using a facile one-step vacuum filtration method. The prepared membrane exhibited both superhydrophilicity and underwater superoleophobicity. Experimental results demonstrated that the membrane achieved high separation efficiency (> 99%), exceptional water flux (3015.8 L∙m− 2∙h− 1), and excellent antifouling properties (Oil Contact Angle max= 152°, low oil adhesion) for water-in-oil emulsions. Moreover, the membrane exhibited outstanding flame retardancy (LOImax=29%) and superior thermal stability. It showed higher thermal decomposition temperatures and significantly slower weight loss rates. This modified GO@SiO2 membrane showed great potential for the industrial-scale treatment of oil-in-water emulsions. Importantly, the flame-retardant properties also made the membrane a promising candidate for offshore oil spill fire remediation.