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| Preparation and Performance of Polyamide/Lignin Nanoparticle Composite Nanofiltration Membranes via Interfacial Polymerization |
| Received:October 19, 2025 Revised:November 10, 2025 |
| DOI：10.11980/j.issn.0254-508X.2025.12.004 |
| Key Words:lignin nanoparticle polyamide composite nanofiltration membranes interfacial polymerization |
| Fund Project:国家重点研发计划项目（2024YFD2201505）。 |
| Author Name | Affiliation | Postcode | | LIU Hai* | College of Light Industry and Engineering,State Key Lab of Biobased Fiber Materials, Tianjin Key Lab of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457 | 300457 | | HAO Zhenxin | College of Light Industry and Engineering,State Key Lab of Biobased Fiber Materials, Tianjin Key Lab of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457
Military Medical Sciences Academy, Academy of Military Sciences, Tianjin, 300050 | 300050 | | LYU Zilu | China National Pulp and Paper Research Institute Co., Ltd., Beijing, 100102 | 100102 | | LI Chenyu | Military Medical Sciences Academy, Academy of Military Sciences, Tianjin, 300050 | 300050 | | DAI Lin* | College of Light Industry and Engineering,State Key Lab of Biobased Fiber Materials, Tianjin Key Lab of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457 | 300457 |
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| Abstract:This study employed interfacial polymerization， using ethanol (EtOH) and ethylene glycol (EG) as the solvent system， to fabricate polyamide/lignin nanoparticle (LNP) composite nanofiltration membranes. By optimizing solvent type and reaction time， this study systematically analyzed the membrane structure and separation performance. The results showed that introducing LNP significantly promoted the interfacial polymerization reaction， enhancing the crosslinking degree and compactness of the polyamide layer. Compared with the pristine membrane， the LNP-EtOH composite nanofiltration membrane exhibited further improved hydrophilicity， with the water contact angle decreasing from 15.93° to 11.98°. Under optimized reaction conditions， the LNP–EtOH 2-1 nanofiltration membrane (2 indicated a 2-min reaction in the aqueous phase， 1 indicated a 1-min reaction in the oil phase) delivered the best performance， with a flux of 60.4 L/(m·h) and a rejection of 32.94% for NaCl， and a flux of 51.7 L/(m·h) and a rejection of 97.14% for Na2SO4. |
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