National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Ping Leyuan No.100, Beijing 100124, China.
National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Ping Leyuan No.100, Beijing 100124, China.
Colloids Surf B Biointerfaces. 2023 Aug;228:113398. doi: 10.1016/j.colsurfb.2023.113398. Epub 2023 Jun 10.
In order to investigate the antifouling performance of low-pressure carbon nanotube membranes based on polydopamine (PDA) biomimetic modification, layered multi-walled carbon nanotubes PDA membrane (layered MWCNTs-PDA) and PDA blended MWCNTs membrane (blended PDA/MWCNTs) were prepared. The MWCNTs membranes' antifouling performance and recoverability was significantly improved in filtrating BSA, HA and SA after PDA biomimetic modification, and the total fouling and irreversible fouling were all decreased. Compared with the blended PDA/MWCNTs membrane, the layered MWCNTs-PDA membrane had higher antifouling property as it further improved the electronegativity and hydrophilicity of membrane surface. In addition, denser surface pore size of the layered MWCNTs-PDA membrane can effectively reduce the fouling by trapping foulants on its surface. The combination of PDA biomimetic modification with MWCNTs membrane had a superior antifouling performance and rejection performance in processing NOM and artificial wastewater, and the majority of humic-like foulants could be excluded by the layered MWCNTs-PDA membrane. PDA biomimetic modification alleviated the adhesion of FITC-BSA on the MWCNTs membrane. The layered MWCNTs-PDA membrane especially alleviated the attachment of bacteria and processed excellent antimicrobial ability for bacteria.
为了研究基于聚多巴胺（PDA）仿生改性的低压碳纳米管膜的抗污染性能，制备了层层多壁碳纳米管 PDA 膜（layered MWCNTs-PDA）和 PDA 共混 MWCNTs 膜（blended PDA/MWCNTs）。经过 PDA 仿生改性，MWCNTs 膜在过滤 BSA、HA 和 SA 时的抗污染性能和恢复性能得到显著提高，总污染和不可逆污染均有所降低。与共混 PDA/MWCNTs 膜相比，层层 MWCNTs-PDA 膜具有更高的抗污染性能，因为它进一步提高了膜表面的电负性和亲水性。此外，层层 MWCNTs-PDA 膜表面孔径更致密，可以有效截留污染物，从而减少污染。MWCNTs 膜与 PDA 仿生改性的结合在处理 NOM 和人工废水方面具有优异的抗污染性能和截留性能，大部分类腐殖质污染物可以被层层 MWCNTs-PDA 膜截留。PDA 仿生改性减轻了 FITC-BSA 在 MWCNTs 膜上的黏附。层层 MWCNTs-PDA 膜尤其减轻了细菌的附着，并对细菌具有优异的抗菌能力。
