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Robust under-liquid dual super-lyophobicity cement material for anti-fouling and oily wastewater treatment
Surface & Coatings Technology ( IF 5.3 ) Pub Date : 2022-01-06 , DOI: 10.1016/j.surfcoat.2021.128067
Jingfang Zhu 1 , Longyang Li 2 , Zhixiang Zeng 2 , Meng Dong 1 , Haizhou Huang 1 , Xiao Xie 1, 3, 4 , Litao Sun 1, 3, 4
Affiliation  

Materials of under-liquids (water/oil) dual super-lyophobicity require special micro/nano morphology. However, such material surfaces are mechanically weak and readily worn, which restricts their practical applications. Herein, we report a robust self-similar under-liquid dual super-lyophobicity anti-fouling cement which demonstrates stable underwater super-oleophobicity (θo/w > 150°) and under oil super-hydrophobicity (θw/o > 150°) via a simply mixed cement and water, without other organic reagents and professional preparation technology. The obtained material not only owns good under-liquids mechanical robustness but also has very excellent anti-fouling property. This surface material still has the anti-oil-fouling property once its surface is mechanically damaged, due to its surface self-similar functionality. Importantly, the surface maintained their excellent super-lyophobic functionality due to the similar property after turbulent jets (5 m range), abrasive belt wear, blade cutting (transverse cutting), highly-viscous tape peeling (VHB, 3 M), and ASTM standard adhesion (scratch spacing and cutting spacing). Cement could separate from oil/water mixtures, the separation efficiency for oil was above 97.5% at 30 cycles. Our study provides an eco-friendly, green, simple, low-cost, and easily mass-produced strategy to the fabrication of super-lyophobic materials in oil/water systems dual functional materials, which will benefit applications in diverse fields.



中文翻译:

坚固的液下双重超疏液水泥材料,用于防污和含油废水处理

液体(水/油)双重超疏液材料需要特殊的微/纳米形态。然而,这种材料表面机械强度低且容易磨损,这限制了它们的实际应用。在此,我们报告了一种坚固的自相似液下双重超疏油防污水泥,它表现出稳定的水下超疏油性(θ o / w  > 150°)和油下超疏水性(θ w / o > 150°)通过简单混合的水泥和水,无需其他有机试剂和专业的制备技术。所得材料不仅具有良好的液下机械强度,而且具有非常优异的防污性能。这种表面材料由于其表面自相似功能,在其表面受到机械损伤后仍具有抗油污性能。重要的是,由于在湍流喷射(5 m 范围)、砂带磨损、刀片切割(横向切割)、高粘性胶带剥离(VHB,3 M)和 ASTM 之后具有相似的特性,该表面保持了其出色的超疏液功能标准附着力(划痕间距和切割间距)。水泥可以从油水混合物中分离出来,30次循环油的分离效率在97.5%以上。我们的研究提供了一种环保、绿色、

更新日期:2022-01-12
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