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| Study on Preparation and Properties of Cellulose Acetate Nanofiltration Membrane via Layer-by-layer Self-assembly and Cooperative Interface Polymerization |
| Received:December 18, 2025 Revised:January 23, 2026 |
| DOI：10.11981/j.issn.1000-6842.2026.03.242 |
| Key Words:cellulose acetate;nanofiltration membrane;layer-by-layer self-assembly;interface polymerization;anti-fouling |
| Fund Project:福厦泉国家自主创新示范区协同创新平台项目3502ZCQXT2022006福厦泉国家自主创新示范区协同创新平台项目（3502ZCQXT2022006）。 |
| Author Name | Affiliation | Postcode | | Lin Danni* | College of Materials Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 | 350108 | | Zhou Leyuan | College of Materials Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 | 350108 | | Zhang Jian | College of Materials Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 | 350108 | | Hu Sisi | College of Materials Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 | 350108 | | Miao Qingxian | College of Materials Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 | 350108 | | Huang Liulian* | College of Materials Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 | 350108 | | Wang Dong* | College of Materials Engineering， Fujian Agriculture and Forestry University， Fuzhou， Fujian Province， 350108 | 350108 |
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| Abstract: |
| In this study， taking advantage of the abundant functional groups （hydroxyl and amino groups） in chitosan （CS） and tannic acid （TA）， an active cross-linked layer was constructed on the cellulose acetate membranes via layer-by-layer self-assembly. Further regulated the reaction rates of polyethylene polyamine （PEPA） and 1，3，5-bis(trichloromethyl)benzene （TMC） in interfacial polymerization reaction to stable load polyamide active layer， constructing a high-performance cellulose acetate nanofiltration membranes. The results showed that when the TA solution， CS solution， PEPA solution， and TMC/n-hexane solution mass concentrations were 1.2， 1.2， 5， and 0.5 g/L， respectively， the prepared cellulose acetate nanofiltration membranes （CA-NF-1 membrane） achieved the optimal separation performance， with rejection rates of 85.0%， 93.8%， 92.0% and 88.0% for NaCl， MgCl2， MgSO4， and Na2SO4， respectively， and a water flux higher than 9.3 L/(m²·h)， while the rejection rates for methylene blue， congo red， bengal rose， and methyl orange all exceeded 97%. After three cycles of bovine serum albumin contamination and rinsing， the water flux of the CA-NF-1 membrane decreased by only 0.2 L/(m²·h)， and the flux recovery ratio reached higher than 97%， demonstrating strong cycle stability and excellent resistance to fouling. |
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