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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >LBL assembled polyelectrolyte nanofiltration membranes with tunable surface charges and high permeation by employing a nanosheet sacrificial layer
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LBL assembled polyelectrolyte nanofiltration membranes with tunable surface charges and high permeation by employing a nanosheet sacrificial layer

机译：通过采用纳米片牺牲层组装具有可调谐表面电荷和高渗透的聚电解质纳米过滤膜

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摘要

Polyelectrolyte membranes provide a highly promising platform for an efficient and sustainable nanofiltration (NF) process. The challenge is to prepare polyelectrolyte NF membranes with high permeation. Herein, we report a novel strategy to fabricate a polyelectrolyte membrane via a layer-by-ayer (LBL) self-assembly technique with a Ni(OH)(2) nanosheet sacrificial layer for a fast NF process. The sacrificial layer helps to deposit a LBL assembled polyelectrolyte layer directly on a microfiltration (MF) substrate and thus results in the formation of a membrane with tiny filtration resistance. Meanwhile, the surface charges and thickness of the membranes can be adjusted facilely by the number of assembled layers. The resultant membranes show excellent NF performances with a high water flux of up to 466 L m(-2) h(-1) bar(-1), perfect rejection for organic dye molecules and moderate salt rejection (88.2% MgSO4). Typically, the 570 nm-thick membrane has the water flux of 198 L m(-2) h(-1) bar(-1), 98% rejection for dyes (M-w 373.9) and 81.3% rejection for MgCl2. Furthermore, the membrane has a good rejection and antifouling ability for organic molecules with similar charges. The newly developed strategy has wide application in the fabrication of highly permeable polyelectrolyte membranes.
机译：聚电解质膜为高效和可持续的纳米滤波（NF）工艺提供了高度有前途的平台。挑战是制备具有高渗透的聚电解质NF膜。在此，我们报告了一种新的策略，通过逐层（LBL）自组装技术用具有Ni（OH）（2）纳米胸桃为牺牲层的用于快速NF工艺的基础α自组装技术来制造聚电解质膜。牺牲层有助于将LBL组装的聚电解质层直接沉积在微滤（MF）底物上，因此导致形成具有微小过滤性的膜。同时，膜的表面电荷和厚度可以通过组装的层的数量来调节。所得膜显示出优异的NF性能，具有高达466μm（-2）H（-1）杆（-1）的高水量，完全抑制有机染料分子和中度盐排斥（88.2％MgSO 4）。通常，570nm厚的膜具有198L m（-2）H（-1）棒（-1）的水通量（-1），染料（M-W 373.9）的98％抑制物（M-W 373.9）和81.3％的MgCl 2排出。此外，膜具有具有类似电荷的有机分子的良好抑制和防污能力。新开发的策略在高渗透聚电解质膜的制造方面具有广泛的应用。

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    Lin Zhen; Zhang Qiugen; Qu Yan; Chen Mengmeng; Soyekwo Faizal; Lin Chenxiao; Zhu Aimei; Liu Qinglin;

  • 作者单位

    Xiamen Univ Dept Chem &

    Biochem Engn Coll Chem &

    Chem Engn Xiamen 361005 Peoples R China;

    Xiamen Univ Dept Chem &

    Biochem Engn Coll Chem &

    Chem Engn Xiamen 361005 Peoples R China;

    Xiamen Univ Dept Chem &

    Biochem Engn Coll Chem &

    Chem Engn Xiamen 361005 Peoples R China;

    Xiamen Univ Dept Chem &

    Biochem Engn Coll Chem &

    Chem Engn Xiamen 361005 Peoples R China;

    Xiamen Univ Dept Chem &

    Biochem Engn Coll Chem &

    Chem Engn Xiamen 361005 Peoples R China;

    Xiamen Univ Dept Chem &

    Biochem Engn Coll Chem &

    Chem Engn Xiamen 361005 Peoples R China;

    Xiamen Univ Dept Chem &

    Biochem Engn Coll Chem &

    Chem Engn Xiamen 361005 Peoples R China;

    Xiamen Univ Dept Chem &

    Biochem Engn Coll Chem &

    Chem Engn Xiamen 361005 Peoples R China;

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  • 正文语种 eng
  • 中图分类 工程材料学;
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