School of Materials Science and Engineering, Xiamen University of Technology , 600 Ligong Road, Xiamen 361024, China.
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University , 220 Handan Road, Shanghai 200433, China.
ACS Appl Mater Interfaces. 2017 Sep 20;9(37):32255-32263. doi: 10.1021/acsami.7b09680. Epub 2017 Sep 11.
Tannic acid-Fe functionalized multiwall carbon nanotubes (TA-MWNTs) were successfully obtained through a simple and rapid procedure by forming a stable TA-Fe complex coating on the MWNT surface. Hydrophilic TA-MWNTs can disperse well in the aqueous phase and help the formation of a polyamide (PA) thin film nanocomposite (TFN) membrane through interfacial polymerization. TA-MWNT concentration in the aqueous phase was adjusted to achieve the optimal water flux and salt rejection of the TFN membrane. The results reveal that, when 0.03% of TA-MWNTs are added, the optimized water flux of the TFN membrane reaches up to 31.4 L/mh, 2.36 times of that of the neat PA membrane, along with a well-maintained NaSO rejection. Furthermore, the as-prepared TFN membrane shows improved antifouling ability and good long-term stability. A significantly enhanced chlorine resistant capability of the TFN membrane is also presented, which can be ascribed to the radical capturing capability of phenol groups of TA as well as more oxidation-stable polyester bonds produced by the interaction between the phenol groups of TA and the acyl chloride groups of TMC. Assisted by TA-MWNTs, the TFN membrane is found to have prominent advantages over PA and MWNTs/PA TFN membranes.
单宁酸 -Fe 功能化多壁碳纳米管（TA-MWNTs）通过在 MWNT 表面形成稳定的 TA-Fe 配合物涂层，成功地通过简单快速的程序获得。亲水性 TA-MWNTs 可以很好地分散在水相中，并通过界面聚合帮助形成聚酰胺（PA）薄膜纳米复合（TFN）膜。调整水相中 TA-MWNTs 的浓度以实现 TFN 膜的最佳水通量和盐截留率。结果表明，当添加 0.03%的 TA-MWNTs 时，TFN 膜的优化水通量高达 31.4 L/mh，是纯 PA 膜的 2.36 倍，同时保持了良好的 NaSO 截留率。此外，所制备的 TFN 膜表现出良好的抗污染能力和长期稳定性。TFN 膜还表现出显著增强的耐氯能力，这归因于 TA 的酚基团的自由基捕获能力以及 TA 的酚基团与 TMC 的酰氯基团之间的相互作用产生的更氧化稳定的聚酯键。在 TA-MWNTs 的辅助下，TFN 膜在 PA 和 MWNTs/PA TFN 膜方面具有明显的优势。
