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首页> 外文期刊>RSC Advances >The preparation of a modified PVDF hollow fiber membrane by coating with multiwalled carbon nanotubes for high antifouling performance
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The preparation of a modified PVDF hollow fiber membrane by coating with multiwalled carbon nanotubes for high antifouling performance

机译：用多壁碳纳米管涂覆改性PVDF中空纤维膜的制备，用于高防污性能

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In this study, an outer surface modified polyvinylidene fluoride (PVDF) hollow fiber membrane (HF-PVDF-CNT) was prepared by coating with dopamine (PD) and multiwalled carbon nanotubes (CNTs), to solve the problems of the instability of pure CNT mats fabricated by filter coating methods and membrane fouling in wastewater treatment. The modified membrane was assessed and characterized by various methods, including studies of its top surface and cross-sectional morphology, wettability, functional groups and electrical conductivity. The CNT material stability was evaluated during backwashing. The antifouling and filtering abilities of the unmodified and modified membranes were tested by monitoring the change in TMP and the rejection performance for different contaminants during filtration in bovine serum albumin solution (BSA), sodium alginate solution (SA) and humic acid solution (HA). Furthermore, HF-PVDF-CNT and electro-assisted HF-PVDF-CNT membranes were employed as the basic separation units in an anaerobic membrane bioreactor (AnMBR) system and an anaerobic electrochemical membrane bioreactor (AnEMBR) system, respectively. Characterization of the HF-PVDF-CNT membrane indicated that the CNT mats exhibited good stability, electrical conductivity and wettability. In filtration experiments using BSA, SA and HA solutions, the HF-PVDF-CNT membrane showed an obvious improvement compared with the HF-PVDF membrane in antifouling performance. During its application in the AnMBR and AnEMBR systems, the electro-assisted HF-PVDF-CNT membrane had greater effects than the HF-PVDF-CNT membrane on reducing fouling.
机译：在该研究中，通过用多巴胺（Pd）和多壁碳纳米管（CNT）涂覆外表面改性聚偏二氟乙烯（PVDF）中空纤维膜（HF-PVDF-CNT），以解决纯CNT的不稳定性问题废水处理中的过滤涂料方法和膜污染制造的垫。通过各种方法评估和表征改性膜，包括其顶表面和横截面形态，润湿性，官能团和导电性的研究。在反洗过程中评估CNT材料稳定性。通过监测牛血清白蛋白溶液（BSA），藻酸钠溶液（SA）和腐殖酸溶液（HA）在过滤期间对不同污染物的不同污染物的变化和不同污染物的排斥性能进行了防污和过滤能力。 。此外，HF-PVDF-CNT和电辅助HF-PVDF-CNT膜分别用作厌氧膜生物反应器（ANMBR）系统中的基本分离单元和厌氧电化学膜生物反应器（ANEMBR）系统。 HF-PVDF-CNT膜的表征表明，CNT垫表现出良好的稳定性，导电性和润湿性。在使用BSA，SA和HA溶液的过滤实验中，HF-PVDF-CNT膜与防污性能的HF-PVDF膜相比，HF-PVDF-CNT膜显着改善。在其在ANMBR和ANEMBR系统中的应用过程中，电辅助的HF-PVDF-CNT膜比减少污垢的HF-PVDF-CNT膜更大。

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