...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Dissecting the Role of Substrate on the Morphology and Separation Properties of Thin Film Composite Polyamide Membranes: Seeing Is Believing
【24h】

Dissecting the Role of Substrate on the Morphology and Separation Properties of Thin Film Composite Polyamide Membranes: Seeing Is Believing

机译：解剖基质的作用对薄膜复合聚酰胺膜的形态和分离性能：看见是相信的

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Recent studies show that the surface morphology of a thin film composite (TFC) polyamide membrane depends strongly on its porous substrate. Nevertheless, the underlining mechanisms and the effects on membrane separation performance remain controversial. To dissect the exact role of pore properties, we synthesized TFC polyamide membranes on polycarbonate substrates with cylindrical track-etched pores (PCTE) of well-defined pore size ranging from 10 to 800 nm. Leaf-like roughness features were most prominent for polyamide films formed on substrates of intermediate pore sizes (80 and 100 nm). Smaller pores inhibited leaf-like features as a result of insufficient storage of m-phenylenediamine (MPD) monomers for the interfacial reaction, whereas larger pores resulted in diminished surface roughness due to the lack of confinement to the interfacially degassed nanobubbles. Substrate porosity plays a critical role on membrane water permeability, while smaller pores with greater pore density are favored to improve membrane rejection. TFC polyamide membranes prepared on sponge-like poly(ether sulfone) and polysulfone substrates exhibit better water permeability and salt rejection compared to the PCTE-TFC membranes thanks to the simultaneously enhanced confinement and MPD storage effects. The mechanistic insights gained in this study reveal the huge potential of substrate design toward high-performance TFC RO membranes.
机译：最近的研究表明，薄膜复合物（TFC）聚酰胺膜的表面形态在其多孔基材上强烈取决于其多孔基材。然而，下划线机制和对膜分离性能的影响仍然存在争议。为了描述孔隙性能的确切作用，我们在具有圆柱形轨道蚀刻孔（PCTE）的聚碳酸酯基材上合成TFC聚酰胺膜（PCTE），范围为10-800nm。对于在中间孔径尺寸（80和100nm）的基板上形成的聚酰胺膜最突出的叶状粗糙度特征。更小的孔抑制片状特征作为存储不足以使界面反应的间苯二胺（MPD）的单体的结果，而较大的孔导致减少的表面粗糙度由于缺乏约束到可界面脱气纳米气泡。基材孔隙率在膜水渗透性上发挥着关键作用，而具有更大孔密度的孔的较小孔是有利于改善膜排斥。由于同时增强的限制和MPD储存效果，与PCTE-TFC膜相比，对海绵状聚（醚砜）和聚砜底物制备的TFC聚酰胺膜表现出更好的水渗透性和盐排斥。本研究中获得的机械洞察力揭示了衬底设计对高性能TFC RO膜的巨大潜力。

著录项

  • 来源
    《Environmental Science & Technology》 |2020年第11期|6978-6986|共9页
  • 作者

    Lu Elfa Peng; Zhikan Yao; Zhe Yang; Hao Guo; Chuyang Y. Tang;

  • 作者单位

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

    College of Chemical and Biological Engineering Zhejiang University Hangzhou 310027 China;

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

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

    Department of Civil Engineering The University of Hong Kong Pokfulam Hong Kong SAR 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号