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首页> 外文期刊>Journal of Materials Research >Effect of mobile cation on zeolite-polyamide thin film nanocomposite membranes
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Effect of mobile cation on zeolite-polyamide thin film nanocomposite membranes

机译：流动阳离子对沸石-聚酰胺薄膜纳米复合膜的影响

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摘要

Hybrid zeolite-polyamide thin film nanocomposite (TFN) reverse osmosis membranes were synthesized by incorporating Linde type A (LTA)-type zeolite molecular sieve nanocrystals in the interfacial polymerization reaction used to form polyamide thin films. Nanocrystals were prepared with two different mobile cations (Na~+ and Ag~+) exchanged within the LTA crystal matrix. Incorporation of molecular sieve nanocrystals into polyamide thin films during interfacial polymerization was verified by infrared spectroscopy. Both TFN membranes exhibited higher water permeability, while maintaining similar salt rejection to pure polyamide thin film composite membranes. Nanocomposite thin films containing LTA nanocrystals in the silver form (AgA) produced a greater increase in water permeability than those in the sodium form (NaA). Furthermore, AgA-TFN membranes exhibited more hydrophilic and smooth interfaces, which appeared to inhibit adhesion of bacteria cells onto the membranes. The AgA nanocrystals exhibited significant bactericidal activity; however, when encapsulated within polyamide thin films the antimicrobial activity was significantly reduced.
机译：通过将林德A型（LTA）型沸石分子筛纳米晶体掺入用于形成聚酰胺薄膜的界面聚合反应中，合成了杂化沸石-聚酰胺薄膜纳米复合材料（TFN）反渗透膜。制备了在LTA晶体基质内交换了两种不同的阳离子（Na〜+和Ag〜+）的纳米晶体。通过红外光谱验证了界面聚合过程中将分子筛纳米晶体掺入聚酰胺薄膜中。两种TFN膜均显示出较高的水渗透性，同时保持与纯聚酰胺薄膜复合膜相似的脱盐率。包含银形式（AgA）的LTA纳米晶体的纳米复合薄膜比钠形式（NaA）的薄膜具有更大的透水性。此外，AgA-TFN膜表现出更多的亲水性和光滑界面，这似乎抑制了细菌细胞粘附到膜上。 AgA纳米晶体具有显着的杀菌活性。然而，当将其包封在聚酰胺薄膜中时，其抗菌活性显着降低。

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  • 来源
    《Journal of Materials Research》 |2009年第5期|1624-1631|共8页
  • 作者

    Mary Laura Lind; Byeong-Heon Jeong; Arun Subramani; Xiaofei Huang; Eric M.V. Hoek UCLA;

  • 作者单位

    Civil & Environmental Engineering Department, and California NanoSystems Institute,University of California-Los Angeles, Los Angeles, California 90095;

    Civil & Environmental Engineering Department, and California NanoSystems Institute,University of California-Los Angeles, Los Angeles, California 90095;

    Civil & Environmental Engineering Department, and California NanoSystems Institute,University of California-Los Angeles, Los Angeles, California 90095;

    Civil & Environmental Engineering Department, and California NanoSystems Institute,University of California-Los Angeles, Los Angeles, California 90095;

    Civil & Environmental Engineering Department, and California NanoSystems Institute,University of California-Los Angeles, Los Angeles, California 90095;

  • 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);
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  • 正文语种 eng
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