Journal of Coatings Technology and Research ( IF 2.3 ) Pub Date : 2021-08-11 , DOI: 10.1007/s11998-021-00511-y Yanbiao Zhou 1 , Kaige Qu 1 , Xiaoqiang Luo 1 , Lihui Zhang 1
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Tremendous efforts have been exerted to develop effective and ecofriendly materials for separation of oil/water mixtures and emulsions. However, porous materials with superwettability for oil/water separation are usually fabricated from nonrenewable precursors, which contradicts with the concept of green development. Inspired by the cellular porosity and hierarchical organization of wood, biodegradable cut and sawed wood slices with different pore sizes were separately machined by a razor blade and a fine-toothed saw. The cut and sawed slices separately possessed rough single- and double-layer structures. After silylation with MTCS, both machined slices repelled water entirely but allowed the complete permeation of oils. The fragment-free cut slice with relatively large pore size was able to separate immiscible oil/water mixtures, while the fragment-covered sawed slice with relatively small pore size could separate water-in-oil emulsions. Compared with other wood slice by sawing, the section structure and superoleophilic property made the slices have a high oil flux for a series of mixtures and emulsions, which reached 72 kL m−2 h−1 and 464 L m−2 h−1, respectively. The flux was high even after 10 cycles, exhibiting favorable recyclable stability.
Graphic abstract
中文翻译：
用于分离油/水混合物和乳液的不同机加工木片
已经付出了巨大的努力来开发用于分离油/水混合物和乳液的有效且环保的材料。然而，用于油水分离的具有超润湿性的多孔材料通常由不可再生的前体制成，这与绿色发展的概念相矛盾。受木材的细胞孔隙率和分级组织的启发，具有不同孔径的可生物降解的切割和锯切的木片分别由刀片和细齿锯加工而成。切割和锯切的切片分别具有粗糙的单层和双层结构。用 MTCS 硅烷化后，两个加工切片都完全排斥水，但允许油完全渗透。孔径相对较大的无碎片切片能够分离不混溶的油/水混合物，而相对较小孔径的碎片覆盖的锯片可以分离油包水乳液。与其他锯切木材切片相比，切片结构和超亲油性使切片对一系列混合物和乳液具有较高的油通量，达到72 kL m-2 h -1和464 L m -2 h -1分别。即使经过 10 次循环，通量仍然很高，表现出良好的可回收稳定性。
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