Switchable superlyophobic zeolitic imidazolate framework-8 film-coated stainless-steel meshes for selective oil–water emulsion separation with high flux,New Journal of Chemistry

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Switchable superlyophobic zeolitic imidazolate framework-8 film-coated stainless-steel meshes for selective oil–water emulsion separation with high flux
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2020-07-08 , DOI: 10.1039/d0nj02517h
Xin Gao _{1,

2,

3,

4,

5} , Qiang Ma _{1,

2,

3,

4,

5} , Zhengwei Jin _{6,

7,

8,

9} , Pei Nian _{1,

2,

3,

4,

5} , Zheng Wang _{1,

2,

3,

4,

5}

Affiliation

Surfactant-stabilized oil–water emulsions are especially difficult pollutants to eliminate. Membrane technology has been extensively applied for oily water treatment. However, the immutable wettability limits its application for separating different types of emulsions. In this work, novel zeolitic imidazolate framework-8 (ZIF-8) film-coated stainless-steel meshes with switchable superlyophobicity were fabricated for all types of emulsion separations. The membranes exhibited outstanding superoleophobicity (161°) and superhydrophobicity (153°). By switching the superlyophobicity through a prewetting process, the membrane could selectively remove oil droplets in surfactant-stabilized oil-in-water emulsions via superoleophobicity and water droplets in surfactant-stabilized water-in-oil emulsions via superhydrophobicity. Upon further modification of the membrane with polyvinyl alcohol, high-flux emulsion separations were achieved. This work provides a foundation for the development of metal–organic framework (MOF) membranes for selective high-flux emulsion separations.

中文翻译：

可切换的超疏液型咪唑沸石骨架8膜涂层不锈钢网，用于高通量选择性油水乳状液分离

表面活性剂稳定的油水乳液尤其难以消除。膜技术已广泛应用于含油水处理。然而，不变的润湿性限制了其在分离不同类型乳液中的应用。在这项工作中，新型的沸石咪唑酸盐骨架8（ZIF-8）薄膜涂层的不锈钢网具有可切换的超疏液性，可用于所有类型的乳液分离。膜表现出杰出的超疏油性（161°）和超疏水性（153°）。通过经由预润湿过程切换superlyophobicity，该膜可以选择性地除去在表面活性剂稳定的油包水乳剂的油滴经由超疏油性和水滴在表面活性剂稳定的水包油乳液通过超疏水性。用聚乙烯醇进一步修饰膜后，可实现高通量乳液分离。这项工作为开发用于选择性高通量乳液分离的金属有机框架（MOF）膜奠定了基础。

更新日期：2020-08-17

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