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首页> 外文期刊>Journal of Applied Polymer Science >Improved separation performance of polyamide based reverse osmosis membrane incorporated with poly(dopamine) coated carbon nanotubes
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Improved separation performance of polyamide based reverse osmosis membrane incorporated with poly(dopamine) coated carbon nanotubes

机译：基于聚酰胺的反渗透膜的分离性能掺入聚（多巴胺）涂布碳纳米管

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摘要

A series of polyamide thin-film nanocomposite (PA TFN) membranes have been fabricated by incorporating hydrophilic poly(dopamine) (PDA) coated carbon nanotubes (CNTs@PDA) into the PA selective layer via interfacial polymerization. The effects of PDA coating thickness on surface characteristics and separation performances of membranes are studied in detail. The PDA coating makes the surface of PA TFN membrane more hydrophilic, smoother and less electronegative. The desalination performance is obviously influenced by the coating thickness of PDA and the loading concentration of PDA@CNTs. The water fluxes of PDA@CNTs incorporated PA TFN membranes have been improved without sacrificing NaCl rejections. When the loading concentration is 0.0010%, the maximum water flux is 48.1 L m(-2) h increasing by 45% compared with that of pristine PA membrane. Meanwhile, the NaCl rejection is up to 99.8%. The CNTs@PDA incorporated PA TFN membranes exhibit better anti-fouling property and separation performance durability. This work proves that CNTs@PDA has great potential application in PA TFN membranes.
机译：通过加入亲水性聚多巴胺（PDA）包覆的碳纳米管，制备了一系列聚酰胺薄膜纳米复合材料（PA-TFN）膜(CNTs@PDA)通过界面聚合进入PA选择性层。详细研究了PDA涂层厚度对膜表面特性和分离性能的影响。PDA涂层使PA-TFN膜的表面更亲水、更光滑、电负性更小。PDA的涂层厚度和负载浓度对脱盐性能有明显影响PDA@CNTs.水通量PDA@CNTs在不牺牲NaCl截留率的情况下，改进了PA-TFN膜。当负载浓度为0.0010%时，最大水通量为48.1 L m（-2）h，比原PA膜增加45%。同时，NaCl的截留率高达99.8%。这个CNTs@PDA掺入PA-TFN膜具有更好的抗污染性能和分离性能耐久性。这项工作证明CNTs@PDA在PA-TFN膜中具有巨大的应用潜力。

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