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首页> 外文期刊>Environmental Science & Technology >Engineering a Nanocomposite Interlayer for a Novel Ceramic-Based Forward Osmosis Membrane with Enhanced Performance
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Engineering a Nanocomposite Interlayer for a Novel Ceramic-Based Forward Osmosis Membrane with Enhanced Performance

机译：用增强性能的新型陶瓷基前渗透膜工程纳米复合夹层

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摘要

Rational design of a high-performance defect-free polyamide (PA) layer on a robust ceramic substrate is challenging for forward osmosis (FO) water treatment applications. In this study, we first demonstrated a robust ceramic-based thin-film composite (TFC) FO membrane by engineering a novel nanocomposite interlayer of titanium dioxide and carbon nanotube (TiO_2/CNT). The structural morphologies and properties were systematically characterized for different substrates (without interlayer, with TiO_2 interlayer, or with TiO_2/CNT interlayer) and the corresponding ceramic-based TFC-FO membranes. Introduction of low roughness nanocomposite interlayers with decreased pore size created an interface with improved surface characteristics, favoring the formation of a defect-free nanovoid-containing PA layer with high cross-linking degree. The resulting ceramic-based FO membrane had a water permeability of approximately 2 L/(m~2 h bar) and a NaCl rejection of 98%, showing simultaneous enhancements in both compared to the control membrane without an interlayer. Mechanism analysis indicates that such a special nanocomposite interlayer not only provided more active sites for the formation of a thinner defect-free nanovoid-containing PA layer without penetration into substrate but also acted as a highly porous three-dimensional network structure for rapid water transport. This work provides a novel protocol for rational design and fabrication of a high-performance multilayered inorganic FO membrane as well as extended applications in water treatment with enhanced performance.
机译：鲁棒陶瓷基材上的高性能缺陷聚酰胺（PA）层的合理设计是对前渗透（Fo）水处理应用的挑战。在该研究中，我们首先通过工程通过工程碳纳米氧化钛和碳纳米管（TiO_2 / CNT）的新型纳米复合夹层来展示一种鲁棒的陶瓷基薄膜复合物（TFC）膜。系统地表征了结构形态和性质，对不同的基材（没有中间层，用TiO_2中间层或用TiO_2 / CNT中间层）和相应的陶瓷基TFC-FO膜。低粗糙度纳米复合夹层的引入具有降低的孔径，产生了具有改善的表面特性的界面，优先于形成具有高交联度的无缺陷的纳米醇的PA层。所得陶瓷的FO膜具有约2L /（m〜2小时）的水渗透性，NaCl排斥反应为98％，显示与没有中间层的对照膜相比的同时增强。机制分析表明，这种特殊的纳米复合夹层不仅提供了更具活性位点，可以形成较薄的无缺陷的纳米醇的PA层，而不会渗透到基材中，而是用作快速水运输的高度多孔的三维网络结构。该工作提供了一种用于理性设计和制备高性能多层无机Fo膜的新型方案，以及具有增强性能的水处理中的扩展应用。

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  • 来源
    《Environmental Science & Technology》 |2020年第12期|7715-7724|共10页
  • 作者

    Mingming Zhang; Wenbiao Jin; Fenglin Yang; Mikel Duke; Yingchao Dong; Chuyang Y. Tang;

  • 作者单位

    Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education MOE) School of Environmental Science and Technology Dalian University of Technology Dalian 116024 China;

    School of Civil and Environmental Engineering Harbin Institute of Technology Shenzhen 518055 China;

    Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education MOE) School of Environmental Science and Technology Dalian University of Technology Dalian 116024 China;

    Institute for Sustainable Industries & Liveable Cities Victoria University Melbourne Australia;

    Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education MOE) School of Environmental Science and Technology Dalian University of Technology Dalian 116024 China;

    Department of Civil Engineering The University of Hong Kong Pokfulam Hong Kong China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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