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- W3174562183 endingPage "119523" @default.
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- W3174562183 abstract "An ultra-thin interlayer of two-dimensional covalent organic frameworks (COFs) was in-situ formed on polysulfone hollow fiber (HF) substrate surface to manipulate the interfacial polymerization process for the construction of thin film nanocomposite (TFN) HF nanofiltration (NF) membrane with greatly improved separation performance. p-Phenylenediamine and 1,3,5-Triformylphloroglucinol monomers were used for constructing the COFs interlayer, piperazine and trimethyl chloride were used for the fabrication of the HF NF polyamide skin separation layer. A series of optimization of the membrane preparation conditions were carried out to achieve the good separation performance. The results demonstrated that the two-dimensional COFs nanomaterials could effectively control the pore size distribution and hydrophobicity of the HF substrate surface, realize a uniform distribution of piperazine on the interlayer surface, thus effectively manipulate the interfacial polymerization process. Under the optimal conditions, the rejections of Na 2 SO 4 , Cr 2 (SO 4 ) 3 , CuSO 4 , ZnSO 4 and MnSO 4 can achieve 96.6 %, 95.4 %, 94.3 %, 91.7 % and 91.0 %, respectively, and the water permeance reaches 86.6 L m −2 h −1 MPa −1 . Meanwhile, the fabricated TFN HF NF membrane shows good long-term stability, fouling resistance, acid and alkali resistance, as well as chlorine resistance, providing its vast potential for application in desalination and heavy metal wastewater treatment. ● Two dimensional covalent organic frameworks constructed as ultra-thin interlayer ● TFN HF NF membrane based on COFs interlayer was successfully prepared ● Achieved high water permeance (86.6 L m −2 h −1 MPa −1 ) and Na 2 SO 4 rejection (96.6%) ● The TFN HF NF membranes has high rejection on heavy metal ions and dyes ● Good long-term stability, and acid/alkaline, chlorine and fouling resistance" @default.
- W3174562183 created "2021-07-05" @default.
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- W3174562183 date "2021-10-01" @default.
- W3174562183 modified "2023-10-11" @default.
- W3174562183 title "Two dimensional COFs as ultra-thin interlayer to build TFN hollow fiber nanofiltration membrane for desalination and heavy metal wastewater treatment" @default.
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- W3174562183 doi "https://doi.org/10.1016/j.memsci.2021.119523" @default.
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