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首页> 外文期刊>Applied Surface Science >High-efficiency separation performance of oil-water emulsions of polyacrylonitrile nanofibrous membrane decorated with metal-organic frameworks
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High-efficiency separation performance of oil-water emulsions of polyacrylonitrile nanofibrous membrane decorated with metal-organic frameworks

机译：金属有机骨架修饰聚丙烯腈纳米纤维膜油水乳状液的高效分离性能

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摘要

A nanofibrous polyacrylonitrile membrane decorated with metal-organic frameworks (MOFs) of UiO-66-NH2 is prepared via a simple and flexible self-assemble method. It is found that the membrane shows high-efficiency separation performance of oil-water emulsions, due to the hydrophilic carboxyl and amino groups of UiO-66-NH2 and the gaps between neighboring UiO-66-NH2. Remarkably, solely driven by gravity (similar to 0.01 bar), the obtained membrane can effectively separate oil-water emulsions with an excellent separation efficiency ( 99%, TOC 10 mg/L) and a high flux (2107 Lm(-2) h(-1)). It is demonstrated that the hydrophilic carboxyl and amino groups of UiO-66-NH2 enhance the superhydrophilicity and underwater superoleophobicity of the membrane so as to greatly improve the antifouling properties of the membrane. Besides, because the size of gaps between neighboring UiO-66-NH2 is mostly much smaller than that of oil drops and the UiO-66-NH2 are underwater oleophobic, the oil drops hardly enter the gaps between neighboring UiO-66-NH2 so that the gaps provide much more water flow tunnels, which obviously enhance the flux of the membrane. In this study, we present a new avenue of building MOFs loaded nanofibrous membrane with excellent oil-water separation performance.
机译：通过简单灵活的自组装方法，制备了装饰有UiO-66-NH2金属-有机骨架（MOF）的纳米纤维聚丙烯腈膜。发现由于UiO-66-NH2的亲水性羧基和氨基以及相邻的UiO-66-NH2之间的间隙，该膜显示出了油水乳液的高效分离性能。引人注目的是，仅靠重力（大约0.01 bar）驱动，所获得的膜就能以优异的分离效率（> 99％，TOC <10 mg / L）和高通量（2107 Lm（-2）有效分离油水乳液）h（-1））。结果表明，UiO-66-NH2的亲水性羧基和氨基增强了膜的超亲水性和水下超疏油性，从而大大提高了膜的防污性能。此外，由于相邻的UiO-66-NH2之间的间隙的大小远小于油滴的大小，并且UiO-66-NH2是水下疏油的，所以油滴很难进入相邻的UiO-66-NH2的间隙，因此间隙提供了更多的水流通道，这显然会增强膜的通量。在这项研究中，我们提出了一种构建具有MOF的纳米纤维膜的新途径，该膜具有出色的油水分离性能。

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  • 来源
    《Applied Surface Science》 |2019年第15期|61-69|共9页
  • 作者

    Li Hui; Zhu Lei; Zhang Jianqiang; Guo Tianchao; Li Xiao; Xing Wei; Xue Qingzhong;

  • 作者单位

    China Univ Petr, State Key Lab Petr Pollut Control, Qingdao 266555, Shandong, Peoples R China|China Univ Petr, Sch Mat Sci & Engn, Qingdao 266580, Shandong, Peoples R China;

    China Univ Petr, Sch Mat Sci & Engn, Qingdao 266580, Shandong, Peoples R China;

    City Univ Hong Kong, Dept Biomed Sci, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China;

    China Univ Petr, Sch Mat Sci & Engn, Qingdao 266580, Shandong, Peoples R China;

    China Univ Petr, Sch Mat Sci & Engn, Qingdao 266580, Shandong, Peoples R China;

    China Univ Petr, Sch Mat Sci & Engn, Qingdao 266580, Shandong, Peoples R China;

    China Univ Petr, State Key Lab Petr Pollut Control, Qingdao 266555, Shandong, Peoples R China|China Univ Petr, Sch Mat Sci & Engn, Qingdao 266580, Shandong, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Metal-organic frameworks; Electrospun; Superhydrophilicity; Antifouling; Oil-water separation;

    机译：金属有机骨架;电纺;超亲水性;防污;油水分离;

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