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Superhydrophilic Stainless Steel Mesh for Oil–Water Separation with Long‐Term Durability, Impressive Corrosion Resistance, and Abrasion Resistance
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2020-06-03 , DOI: 10.1002/adem.202000262
Bin Sun 1, 2 , Fengmei Zhang 3 , Min Gao 1, 2 , Song Zhao 1, 2 , Jiarou Wang 1, 2 , Wen Zhang 1, 2 , Zhi Wang 1, 2 , Jixiao Wang 1, 2
Affiliation  

Durable properties of oil–water separation materials are challenging issue during the development from laboratory to practical application. Herein, twill woven stainless‐steel mesh is modified through oxidation and conversion steps, and applied for oil–water separation. The modified mesh displays excellent superhydrophilic property with water contact angle ≈0° and underwater oil contact angle up to 159°. Oil–water separation performance is evaluated using a series of oil–water mixtures. The results demonstrate that oil–water mixtures can be separated under gravity with oil rejection >99% and water permeate fluxes in the range of 40–60 k L m−2 h−1. Moreover, the modified mesh shows long‐term durability, excellent chemical corrosion resistance, abrasion resistance, and fouling resistance. It can maintain stable oil rejection and water flux even after 100 cycles separation for machine oil–water mixture, or after 300 days immersion in artificial seawater, or after 15 days immersion in corrosion acidic or alkaline solutions. Furthermore, the modified mesh exhibit impressive abrasion resistance that keep oil rejection >99% after 80 m abrasion under 1000 g. These excellent performances of the modified mesh are further explained from the special texture of twill woven stainless‐steel mesh and the formed water film due to its superhydrophilicity.

中文翻译:

超亲水不锈钢网,用于油水分离,具有长期耐用性,耐腐蚀性能和耐磨性

从实验室到实际应用的发展过程中,油水分离材料的耐用性能是一个具有挑战性的问题。在此,斜纹不锈钢编织网通过氧化和转化步骤进行了改性,并用于油水分离。改进的网眼具有出色的超亲水性,水接触角≈0°,水下油接触角高达159°。使用一系列油水混合物评估油水分离性能。结果表明,油水混合物可以在重力作用下分离,排油率> 99%,并且水渗透通量范围为40–60 k L m -2  h -1。此外,改性网具有长期耐用性,出色的耐化学腐蚀性,耐磨性和耐污垢性。即使对机油水混合物进行100次循环分离后,或在人造海水中浸泡300天后,或在酸性或碱性腐蚀溶液中浸泡15天后,它也可以保持稳定的除油和水通量。此外,改性的网片还具有令人印象深刻的耐磨性,在80 g的磨损下(低于1000 g),除油率保持在99%以上。斜纹编织不锈钢网的特殊质地和超亲水性形成的水膜进一步说明了改性网的这些优异性能。
更新日期:2020-06-03
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