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Electrospun functionalized polyacrylonitrile-chitosan Bi-layer membranes for water filtration applications

机译：电纺官能化聚丙烯腈 - 壳聚糖用于水过滤应用的双层膜

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摘要

Water scarcity has become a global systemic risk, prompting the development of more efficient filtration technologies. Recently, increasing attention has been given to low cost membrane materials such as polyacrylonitrile (PAN) nanofibers for water filtration. In this study, electrospun PAN nanofibrous membranes were functionalized with zinc oxide (ZnO) nanoparticles and coated with a layer of electrospun chitosan (Cs), in order to improve the mechanical properties, and anti-bacterial and water filtration performance of the membranes. Morphological analysis revealed that the PAN/ZnO-Cs membranes featured a structural hierarchy comprising a layer of highly porous nanofibrous PAN membranes and a less fibrous and thinner layer of a Cs coating. Addition of the Cs layer increases the tensile strength and elastic modulus of the membranes. Results acquired from a water permeability test indicated that the bi-layer membranes possessed adequate transport properties for typical membrane applications. Furthermore, the additional Cs layer and ZnO nanoparticles significantly improved the heavy metal ion adsorption performance of the PAN membranes. Moreover, the efficiency of the PAN/ ZnO-Cs membrane for bacteria filtration has a log reduction value 2 orders of magnitude higher than PAN membranes, while the efficiency of these membranes for antibacterial action (i.e. in terms of log reduction value) is 6 orders of magnitude higher than PAN membranes. These results indicate the PAN/ ZnO-Cs membranes are structurally more stable than PAN membranes, better at bacteria removal during the filtration process and better at self-cleaning (i.e. membrane biofouling resistance) than PAN membranes, signifying the potential of these membranes for water filtration applications.
机译：水资源短缺已成为全球性的全身风险，促使开发更有效的过滤技术。最近，已经向低成本膜材料进行了增加，例如聚丙烯腈（PAN）纳米纤维用于水过滤。在该研究中，用氧化锌（ZnO）纳米颗粒官能化电纺锅纳米纤维膜，并用一层电纺壳聚糖（Cs）涂覆，以改善膜的机械性能，以及抗细菌和水过滤性能。形态学分析表明，锅/ ZnO-CS膜特征是一种结构层，包括一层高度多孔的纳米纤维锅膜和Cs涂层的较小纤维和较薄的层。添加CS层增加了膜的拉伸强度和弹性模量。从水渗透性测试获得的结果表明，双层膜具有典型膜应用的足够的运输性能。此外，附加的Cs层和ZnO纳米颗粒显着提高了潘膜的重金属离子吸附性能。此外，用于细菌过滤的平移/ ZnO-CS膜的效率具有比PAN膜高2个数量级，而这些膜用于抗菌作用的效率（即，在降低记录值方面）是6个订单比潘膜高的数量。这些结果表明，锅/ ZnO-CS膜的结构上比潘膜更稳定，在过滤过程中的细菌中更好地去除，并且在自清洁（即膜生物膨胀性抵抗力）上比潘膜更好，从而表示这些膜用于水的潜力过滤应用。

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  • 来源
    《RSC Advances》 |2016年第59期|共12页
  • 作者

    Makaremi Maziyar; Lim Chia Xin; Pasbakhsh Pooria; Lee Sui Mae; Goh Kheng Lim; Chang Hengky; Chan Eng Seng;

  • 作者单位

    Monash Univ Malaysia Sch Engn Mech Engn Discipline Adv Engn Platform Selangor 47500 Malaysia;

    Monash Univ Malaysia Sch Sci Selangor 47500 Malaysia;

    Monash Univ Malaysia Sch Engn Mech Engn Discipline Adv Engn Platform Selangor 47500 Malaysia;

    Monash Univ Malaysia Sch Sci Selangor 47500 Malaysia;

    Newcastle Univ Sch Mech &

    Syst Engn Newcastle Upon Tyne NE1 7RU Tyne &

    Wear England;

    Nanyang Polytech Sch Engn Mfg Biomed Engn Grp Nanotechnol &

    Mat Sci Singapore 569830 Singapore;

    Monash Univ Malaysia Sch Engn Chem Engn Discipline Adv Engn Platform Selangor 47500 Malaysia;

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  • 中图分类 化学;
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