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首页> 外文期刊>Separation and Purification Technology >In situ formation of copper nanoparticles in carboxylated chitosan layer: Preparation and characterization of surface modified TFC membrane with protein fouling resistance and long-lasting antibacterial properties
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In situ formation of copper nanoparticles in carboxylated chitosan layer: Preparation and characterization of surface modified TFC membrane with protein fouling resistance and long-lasting antibacterial properties

机译：原位形成羧酸壳聚糖层中的铜纳米粒子：用蛋白质污垢抗性和持久性抗菌性能的表面改性TFC膜的制备和表征

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摘要

In this study, copper nanoparticles (CuNPs) modified polyamide thin-film composite (TFC) membranes with long-lasting antibacterial properties and anti-protein-fouling properties were prepared by surface coating method. During modification, carboxylated chitosan (CCTS), a hydrophilic natural polymer, was coated onto the membrane surface, which was then treated with CuCl2 aqueous solutions and cross linking agent glutaraldehyde to reduce the Cu2+ to CuNPs in situ and fix them in the cross-linked coating layer. The formation of CuNPs was confirmed by SEM, EDS and XPS analysis. Copper ion release measurement showed CuNPs modified TFC membranes (PA-CCTS-Cu) could release Cu2+ in a slow and sustainable way due to chelating effect between CCTS and Cu2+. PA-CCTS-Cu had antibacterial efficiency of above 99% and could maintain it after 90 days' immersion in water. PA-CCTS-Cu also exhibited better anti-protein fouling performance than the pristine TFC membrane, with lower reduction of flux after fouling and higher recovery after cleaning in fouling test using bovine serum albumin as model foulant. This enhanced anti-protein-fouling performance was ascribed to the CCTS coating layer, which had enhanced hydrophilicity as assessed by contact angle measurement. (C) 2016 Elsevier B.V. All rights reserved.
机译：在该研究中，通过表面涂布方法制备铜纳米粒子（CUNP）改性聚酰胺薄膜复合（TFC）膜，具有长持续的抗菌性能和抗蛋白质结垢性能。在改性期间，羧化壳聚糖（CCTS），亲水性天然聚合物涂覆到膜表面上，然后用CuCl 2水溶液和交联的链接剂戊二醛处理，以将Cu2 +以原位将其固定并将其固定在交联中涂层。 SEM，EDS和XPS分析证实了CUNP的形成。铜离子释放测量显示CUNPS改性TFC膜（PA-CCTS-Cu）由于CCTS和Cu2 +之间的螯合效应，可以缓慢和可持续的方式释放Cu2 +。 PA-CCTS-Cu的抗菌效率高于99％，可以在90天'浸入水中后保持它。 PA-CCTS-Cu还表现出比原始TFC膜更好的抗蛋白质污垢性能，在使用牛血清白蛋白作为模型污垢污垢污垢污染后污染后污垢和恢复更高的助熔剂。这种增强的抗蛋白质结垢性能归因于CCTS涂层，其具有通过接触角测量评估的亲水性而增强。 （c）2016年Elsevier B.v.保留所有权利。

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