One-pot mussel-inspiration and silication: A platform for constructing oil-repellent surfaces toward crude oil/water separation
One-pot mussel-inspiration and silication: A platform for constructing oil-repellent surfaces toward crude oil/water separation
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一锅贻贝启发和硅化：构建憎油表面以实现原油/水分离的平台
DOI：
10.1016/j.memsci.2020.117915
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发表时间：
2020-03
影响因子：
9.5
通讯作者：
Zhi-Kang Xu
中科院分区：
文献类型：
--
作者：
Jun-Ke Pi;Jing Yang;Zhi-Kang Xu
超亲水过滤器具有优良的水下拒油表面，在原油/水分离领域具有重要意义。它们的孔径应根据“尺寸筛分”原理与分离目标相匹配（小于油滴）。然而，在实际应用中，如何方便灵活地调节过滤器的孔径以有效地分离含有不同尺寸原油液滴的含油废水是一项棘手的任务。本文中，基于一锅贻贝吸气和硅化的通用平台已被验证为在空气/水界面处制备自支撑纳米膜，并同时在聚丙烯微滤膜或铜网上沉积涂层。自支撑膜和沉积涂层的化学和形态的演变被实时监测，以深入了解表面的形成。我们建议贻贝灵感和硅化是异步的，负责形成的纳米膜和涂层表面可调的亲水部分和微纳米复合结构。这些结构特征赋予表面水下的超亲水性/超疏油性和低原油粘附性，特别是在碱性水环境或盐水中，无论盐类型如何。具有纳米尺寸间隔的自支撑纳米膜能够从原油水包油纳米乳液中排斥纳米液滴。涂敷聚丙烯微滤膜和铜网可分别用于水包油型微乳液和油水混合物的分离。所有过滤器在分离过程中均表现出对原油的高效拒油性（>99%）。这项工作有助于一个有前途的概念，一锅制造方法，以满足特定任务的要求，原油/水分离。
Superhydrophilic filters with excellent subaqueous oil-repellent surfaces are of great significance in the field of crude oil/water separation. Their pore size should be matched with the separation target (smaller than the oil droplets) based on the “size sieving” principle. However, it is a tricky task to facilely and flexibly tune the pore size of filters to effectively separate oily wastewater containing crude oil droplets with different sizes in practice. Herein, a universal platform based on the one-pot mussel-inspiration and silication has been verified to prepare free-standing nanofilms at the air/water interface and deposited coatings on the polypropylene microfiltration membrane or the copper mesh simultaneously. The evolution of chemistries and morphologies of the free-standing films and the deposited coatings is in real-time monitored to deeply understand the formation of the surfaces. We suggest the mussel-inspiration and the silication is asynchronous, being responsible for the formation of the nanofilm and coating surfaces with tunable hydrophilic moieties and micro-nano composite structures. These structure characteristics endow the surfaces with a superhydrophilicity/superoleophobicity underwater and with a low crude oil adhesion especially in basic aqueous environment or salty water regardless of the salt type. The free-standing nanofilms with nano-sized intervals are able to reject nano-droplets from the crude oil-in-water nanoemulsions. The coated polypropylene microfiltration membrane and copper mesh can be applied in oil-in-water microemulsions and oil/water mixtures separation, respectively. All filters show a highly efficient oil repellence of crude oil (>99%) during the separation. This work contributes a promising concept of a one-pot fabrication methodology for fulfilling task-specific requirements of crude oil/water separation.
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影响因子：
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作者：
Zhenwei Yu;F. Yun;Zhiyuan Gong;Q. Yao;S. Dou;Kesong Liu;Lei Jiang;Xiaolin Wang
通讯作者：
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影响因子：
3.9
作者：
Knorr, Daniel B., Jr.;Tran, Ngon T.;Lenhart, Joseph L.
通讯作者：
Lenhart, Joseph L.
影响因子：
9.5
作者：
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通讯作者：
Xu, Zhi-Kang
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影响因子：
19
作者：
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通讯作者：
Jin, Jian
影响因子：
6.7
作者：
Xi Zhang;Pengfei Ren;Hao‐Cheng Yang;L. Wan;Zhi‐Kang Xu
通讯作者：
Xi Zhang;Pengfei Ren;Hao‐Cheng Yang;L. Wan;Zhi‐Kang Xu