A prewetting induced underwater superoleophobic or underoil (super) hydrophobic waste potato residue-coated mesh for selective efficient oil/water separation
A prewetting induced underwater superoleophobic or underoil (super) hydrophobic waste potato residue-coated mesh for selective efficient oil/water separation
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DOI：
10.1039/c5gc01818h
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发表时间：
2016-01-01
期刊：
影响因子：
9.8
通讯作者：
Lei, Ziqiang
中科院分区：
文献类型：
--
作者：
Li, Jian;Li, Dianming;Lei, Ziqiang
近年来，由于工业含油废水的不断增加和溢油事故的频繁发生，油水分离已成为一个世界性的挑战。已经尝试开发低成本、生物基和环境友好的材料来处理由油引起的环境敏感的水污染。在此，预湿诱导水下超疏油或underoil（超）疏水性废马铃薯渣涂层网（PRCM）没有任何进一步的化学改性，首次证明了选择性油/水分离，这是通过喷涂废马铃薯渣粉末（PRP）和水性聚氨酯（PU）混合物在不锈钢网制成。在PRCM用水预润湿之后，可以通过重力以高分离效率从轻质油/水混合物中除去水。另一方面，重油可以通过重油预润湿的PRCM通过重力从油/水混合物中去除。所制备的PRCM对一系列轻质或重质油水混合物的分离效率均在96.5%以上。此外，PRCM保持了98.0%以上的高分离效率和稳定的可回收性，即使在40个分离循环的煤油-水混合物。此外，所制备的PRCM在一系列苛刻条件下表现出优异的环境稳定性，用于分离油和各种腐蚀性物质的混合物，包括强酸、强碱和盐水溶液。
Oil/water separation has recently become a worldwide challenge due to expanding industrial oily waste-water and frequent oil spill accidents. The development of a low-cost, biobased, and environmentally friendly material has been attempted to treat environmentally sensitive water pollution caused by oils. Herein, prewetting induced underwater superoleophobic or underoil (super) hydrophobic waste potato residue coated-mesh (PRCM) without any further chemical modification was demonstrated for the first time for selective oil/water separation, which was fabricated by spraying waste potato residue powders (PRP) and waterborne polyurethane (PU) mixtures on a stainless steel mesh. After the PRCM is prewetted with water, water can be removed from the light oil/water mixture by gravity with high separation efficiency. On the other hand, heavy oil can be removed from the oil/water mixture by gravity via the heavy oil prewetted PRCM. The as-prepared PRCM showed a high separation efficiency of above 96.5% for a series of light or heavy oil-water mixtures. In addition, the PRCMs maintained a high separation efficiency of over 98.0% and a stable recyclability even after 40 separation cycles for a kerosene-water mixture. Furthermore, the as-prepared PRCM exhibited excellent environmental stability under a series of harsh conditions that were used for the separation of mixtures of oil and various corrosive materials, including strong acidic, alkaline and salt aqueous solutions.