Interfacial polymerization of thin film nanocomposites: A new concept for reverse osmosis membranes
Interfacial polymerization of thin film nanocomposites: A new concept for reverse osmosis membranes
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DOI：
10.1016/j.memsci.2007.02.025
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发表时间：
2007-05-15
影响因子：
9.5
通讯作者：
Jawor, Anna
中科院分区：
文献类型：
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作者：
Jeong, Byeong-Heon;Hoek, Eric M. V.;Jawor, Anna
在这里，我们报道了一种新的概念，通过在多孔聚砜载体上原位界面聚合纳米复合薄膜来形成混合基质反渗透膜。为本研究创建的纳米复合膜包括分散在50-200 nm厚的聚酰胺膜中的NAA沸石纳米颗粒。手工浇注的纯聚酰胺膜具有商业聚酰胺反渗透膜的表面形态特征，而纳米复合膜具有更光滑和更亲水的负电荷表面。在测试的最高纳米颗粒载量下，手工浇注的纳米复合膜的形貌明显不同，纯水渗透率几乎是溶质截留率相同的手工浇注聚酰胺膜的两倍。通过对孔道填充沸石和孔道开孔沸石形成的膜的比较表明，纳米颗粒孔在水渗透和溶质截留方面起着积极的作用。性能最好的纳米复合膜表现出与商业反渗透膜相当的渗透性和截留性。作为一个概念，薄膜纳米复合膜技术可能在调节反渗透膜的分离性能和材料性能方面提供新的自由度。(C)2007 Elsevier B.V.保留所有权利。
Here, we report On a new concept for formation of mixed matrix reverse osmosis membranes by interfacial polymerization of nanocomposite thin films in situ on porous polysulfone supports. Nanocomposite films created for this study comprise NaA zeolite nanoparticles dispersed within 50-200 nm thick polyamide films. Hand-cast pure polyamide membranes exhibit surface morphologies characteristic of commercial polyamide RO membranes, whereas nanocomposite membranes have measurably smoother and more hydrophilic, negatively charged surfaces. At the highest nanoparticle loadings tested, hand-cast nanocomposite film morphology is visibly different and pure water permeability is nearly double that of hand-cast polyamide membranes with equivalent solute rejections. Comparison of membranes formed using pore-filled and pore-opened zeolites suggest nanoparticle pores play an active role in water permeation and solute rejection. The best performing nanocomposite membranes exhibit permeability and rejection characteristics comparable to commercial RO membranes. As a concept, thin film nanocomposite membrane technology may offer new degrees of freedom in tailoring RO membrane separation performance and material properties. (C) 2007 Elsevier B.V. All rights reserved.