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Superhydrophobic wire-cotton woven porous material with excellent durability for emulsion separation
Separation and Purification Technology ( IF 8.6 ) Pub Date : 2023-05-26 , DOI: 10.1016/j.seppur.2023.124175
Yu Yang, Zhiying Ren, Weiping Chen, Mingzhi Fan, Youxi Lin, Zhiguang Guo

Superhydrophobic materials have been extensively investigated for their ability to separate oil/water mixtures, but their fragile durability has limited further development in this field. In this study, a durable superhydrophobic wire-cotton-based material (SWCM) was prepared by weaving metal wire and cotton fiber and modifying it with a mixed poly(vinyl phenol) (PVPh)/1,3-phenylene bisoxazoline (PBO) solution, which exhibits both macro-frame and micro-aperture. The SWCM demonstrates remarkable separation efficiency (greater than99.98 %) for a variety of water-in-oil emulsions using only gravity drive. More importantly, computational fluid dynamics (CFD) simulations were conducted to investigate the separation mechanism of SWCM, revealing dynamic trajectory and volume changes of water droplets in real-time. Moreover, the micro-aperture, protected by the macro-frame, can withstand hundreds of impacts and abrasions and still maintain reliable separation efficiency. Under the encapsulation of micro-apertures, the macro-frame exhibits excellent corrosion resistance and can maintain stable superhydrophobicity even after long-term immersion in different harsh solutions. Due to its excellent durability, the SWCM can maintain a long service life in oil–water separation in complex environments. Therefore, the presented SWCM has great potential in the development of durable and efficient materials for emulsion separation.



中文翻译:

超疏水丝棉编织多孔材料,具有优异的乳液分离耐久性

超疏水材料因其分离油/水混合物的能力而受到广泛研究,但其脆弱的耐用性限制了该领域的进一步发展。在这项研究中,通过编织金属丝和棉纤维并用混合聚(乙烯基苯酚)(PVPh)/1,3-亚苯基双恶唑啉(PBO)溶液对其进行改性,制备了一种耐用的超疏水棉丝材料(SWCM) ,它同时展示了宏观框架和微孔径。对于仅使用重力驱动的各种油包水乳液,SWCM 表现出显着的分离效率(大于 99.98 %)。更重要的是,进行了计算流体动力学 (CFD) 模拟以研究 SWCM 的分离机制,实时揭示水滴的动态轨迹和体积变化。此外,微孔径,由大框架保护,可承受数百次冲击和磨损,仍保持可靠的分离效率。在微孔径的封装下,大框架表现出优异的耐腐蚀性能,即使长期浸泡在不同的苛刻溶液中也能保持稳定的超疏水性。SWCM凭借其出色的耐用性,在复杂环境下的油水分离中也能保持较长的使用寿命。因此,所提出的 SWCM 在开发耐用高效的乳液分离材料方面具有巨大潜力。宏观框架表现出优异的耐腐蚀性,即使在不同苛刻的溶液中长期浸泡后也能保持稳定的超疏水性。SWCM凭借其出色的耐用性,在复杂环境下的油水分离中也能保持较长的使用寿命。因此,所提出的 SWCM 在开发耐用高效的乳液分离材料方面具有巨大潜力。宏观框架表现出优异的耐腐蚀性,即使在不同的苛刻溶液中长期浸泡后也能保持稳定的超疏水性。SWCM凭借其出色的耐用性,在复杂环境下的油水分离中也能保持较长的使用寿命。因此,所提出的 SWCM 在开发耐用高效的乳液分离材料方面具有巨大潜力。

更新日期:2023-05-31
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