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Preparation and characterization of porous polyelectrolyte complex membranes for nanofiltration

机译：多孔聚电解质复合膜用于纳滤的制备与表征

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摘要

Polyelectrolyte complex membranes were prepared from poly(acrylic acid-co-acrylonitrile)s and imidazolium-based polycations via a combination of blend film casting and ammonia solution immersion procedures. The membranes were free-standing and tough, showing excellent mechanical properties (with tensile strength of 6.71-23.7 MPa and elongation at break of 15-59%). Hierarchically structured nanopores were formed in the membranes during the ammonia soaking step, due to NH3-triggered -COOH deprotonation and in situ ionic crosslinking with polycations. Zeta potential measurements indicated that the membranes were negatively charged under neutral conditions. The membranes exhibited moderate rejection to salts in the order of Na2SO4 > NaCl > MgCl2, but high rejection to methyl orange (>99.9%).
机译：通过共混膜浇铸和氨溶液浸渍程序的组合由聚（丙烯酸 - 共丙烯腈）S和基于咪唑鎓基的聚合物制备聚电解质复合膜。 膜是独立且坚韧的，显示出优异的机械性能（拉伸强度为6.71-23.7MPa，突破15-59％）。 由于NH 3引发的-COOH去质子化和用聚合物的原位离子交联，在氨浸润步骤中形成分层结构纳米孔。 Zeta电位测量表明，膜在中性条件下负电荷。 膜按Na 2 SO 4> NaCl> MgCl 2的顺序表现出对盐的抑制力，但对甲基甲基（> 99.9％）屈服。

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  • 来源
    《RSC Advances》 |2015年第5期|共7页
  • 作者

    Yang Yanqin; Zhang Qifeng; Li Shenghai; Zhang Suobo;

  • 作者单位

    Chinese Acad Sci Changchun Inst Appl Chem Key Lab Polymer Ecomat Changchun 130022 Peoples R China;

    Chinese Acad Sci Changchun Inst Appl Chem Key Lab Polymer Ecomat Changchun 130022 Peoples R China;

    Chinese Acad Sci Changchun Inst Appl Chem Key Lab Polymer Ecomat Changchun 130022 Peoples R China;

    Chinese Acad Sci Changchun Inst Appl Chem Key Lab Polymer Ecomat Changchun 130022 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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