Pre-oxidized PAN Nanofibrous Membrane to Efficiently and Continuously Separate Large-Scale Viscous Oil-in-Water Emulsions Under Harsh Conditions with Ultra-Long-Term Oil-Fouling Recovery

IF 17.2 1区工程技术 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Advanced Fiber Materials Pub Date : 2024-03-26 DOI:10.1007/s42765-024-00383-y

Hongwei Su, Hua Hu, Zhenyu Li, Guilong Yan, Li Wang, Dong Xiang, Chunxia Zhao, Yuanpeng Wu, Jingyu Chen, Ce Wang

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Abstract

High-performance multifunctional filtration membranes are highly required in treating practically complex oily wastewater systems, but still a challenge unsolved. Herein, we propose a facile route to address these challenges simultaneously by simply constructing electrospun pre-oxidized polyacrylonitrile nanofibrous membrane (p-PAN NM). Given the pre-oxidation process, the p-PAN NM displays not only robust anti-corrosive tolerance against diverse corrosive media, but also superhydrophilicity/underwater superoleophobicity. Additionally, ~ 99% separation efficiency, ~ 100% oil-fouling recovery, and ultra-long service life (up to 265 h) have been realized in separating large-scale surfactant stabilized soybean/crude oil-in-water emulsions. Furthermore, strong anti-corrosive performance against various corrosive media (e.g., 1 M HCl, 1 M NaOH, or 10 wt% NaCl) has been achieved as well. Spin-unrestricted density functional theory (DFT) computations implemented in the Dmol3 modulus has been conducted to understand the robust fouling recovery and the variation of surficial wettability after pre-oxidation. These outstanding filtration functions make our NM hold great potential in separating viscous oil/water emulsions under harsh conditions.

Graphical Abstract

Abstract Image

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预氧化 PAN 纳米纤维膜可在恶劣条件下高效、持续地分离大规模粘性水包油型乳状液，并具有超长的油污恢复能力

在处理实际复杂的含油废水系统时，对高性能多功能过滤膜的要求很高，但这一难题仍未得到解决。在此，我们提出了一种同时应对这些挑战的简便方法，即简单地构建电纺预氧化聚丙烯腈纳米纤维膜（p-PAN NM）。由于采用了预氧化工艺，p-PAN NM 不仅对各种腐蚀性介质具有很强的耐腐蚀性，而且还具有超亲水性/水下超疏水性。此外，在分离大规模表面活性剂稳定的大豆/原油水包水乳液时，实现了约 99% 的分离效率、约 100% 的油污回收率和超长的使用寿命（长达 265 小时）。此外，还实现了对各种腐蚀性介质（如 1 M HCl、1 M NaOH 或 10 wt% NaCl）的强抗腐蚀性能。在 Dmol3 模量中进行了自旋无限制密度泛函理论（DFT）计算，以了解预氧化后强大的污垢恢复能力和表面润湿性的变化。这些出色的过滤功能使我们的 NM 在恶劣条件下分离粘性油/水乳剂方面具有巨大潜力。

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来源期刊

Advanced Fiber Materials Multiple-

CiteScore

18.70

自引率

11.20%

发文量

109

期刊介绍： Advanced Fiber Materials is a hybrid, peer-reviewed, international and interdisciplinary research journal which aims to publish the most important papers in fibers and fiber-related devices as well as their applications.Indexed by SCIE, EI, Scopus et al. Publishing on fiber or fiber-related materials, technology, engineering and application.