Abstract

In this study, we developed the super-hydrophilic nanofibrous composite membrane for the highly efficient separation of various oil-in-water emulsions. To achieve this target, the acidified carbon nanotubes (AC-CNTs) intercalated graphene oxide (GO) were assembled onto electrospun poly(arylene ether nitrile) (PEN) nanofibrous mats via simple vacuum-assisted filtration. As obtained membrane was further modified by dopamine and KH550, thus enhancing the hydrophilicity and micro-/nano- rough structure of membrane surface. As a result, the constructed composite membrane exhibited super-hydrophilic property (water contact angle: ~0°) and high oil–water separation performance for various oil-in-water emulsions (separation flux: 191.7–384.8 L m^–2 h^–1 and rejection ratio: >94%). In addition, the hierarchical intercalation structure and super-wetting interface endowed the membrane with good anti-fouling performance. Therefore, this work provides an alternative way to construct super-hydrophilic nanofibrous composite membrane for the oily wastewater treatment.

中文翻译：

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超亲水聚（亚芳基醚腈）纳米纤维复合膜：简便的策略和油水乳液分离

摘要

在这项研究中，我们开发了超亲水纳米纤维复合膜，用于高效分离各种水包油乳液。为了实现这一目标，通过简单的真空辅助过滤将酸化碳纳米管 (AC-CNT) 插入的氧化石墨烯 (GO) 组装到电纺聚亚芳基醚腈 (PEN) 纳米纤维垫上。得到的膜进一步被多巴胺和KH550修饰，从而增强了膜表面的亲水性和微/纳米粗糙结构。结果，构建的复合膜对各种水包油乳液表现出超亲水性（水接触角：~0°）和高油水分离性能（分离通量：191.7–384.8 L m ^–2 h ^{– 1}和拒绝率：> 94％）。此外，分级插层结构和超润湿界面赋予膜良好的防污性能。因此，这项工作为构建用于含油废水处理的超亲水纳米纤维复合膜提供了一种替代方法。