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| Preparation of Super High-strength Regenerated Cellulose Nanofiltration Membrane and Its Solvent Recovery Performance |
| Received:April 03, 2024 Revised:May 03, 2024 |
| DOI：10.11981/j.issn.1000-6842.2025.02.78 |
| Key Words:regenerated cellulose;nanofiltration membrane;ionic liquid recovery;super high strength;interfacial polymerization |
| Fund Project:国家重点研发计划（2023YFD2201903）；国家自然科学基金面上项目（22178028）。 |
| Author Name | Affiliation | Postcode | | ZHENG Wenqiu* | College of Materials Science and Technology， Beijing Forestry University， Beijing， 100080 | 100080 | | MA Yingxiang | College of Materials Science and Technology， Beijing Forestry University， Beijing， 100080 | 100080 | | YANG Xiaogang | College of Textile Science and Engineering （International Silk College）， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 | 310018 | | WANG Xiaoyu | College of Textile Science and Engineering （International Silk College）， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 | 310018 | | CHENG Chunzu | National Key Laboratory of Bio-based Fiber Materials， China Textile Academy， Beijing， 100025 | 100025 | | ZHANG Guoyan | Hangzhou Nuobang Nonwoven Co.， Ltd.， Hangzhou， Zhejiang Province， 310000 | 310000 | | XU Feng* | College of Materials Science and Technology， Beijing Forestry University， Beijing， 100080
College of Textile Science and Engineering （International Silk College）， Zhejiang Sci-Tech University， Hangzhou， Zhejiang Province， 310018 | 310018 |
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| Abstract: |
| To address the issues of low mechanical strength and non-biodegradability in traditional nanofiltration membranes， regenerated cellulose membranes （RCMs） were first prepared via the phase inversion process to serve as the support layer. Subsequently， a series of super-strength regenerated cellulose nanofiltration membranes （RC-NFs） were fabricated using interfacial polymerization for the recovery of ionic liquids （ILs）. The recovery performance of RC-NFs for ILs was evaluated by optimizing the type of anti-solvent， analyzing the surface morphology， thermal stability， wettability， and mechanical strength of the RC-NFs， and adjusting interfacial polymerization conditions such as the mass fractions of piperazine （PIP） and 1，3，5-benzenetricarbonyl trichloride （TMC）， as well as the polymerization time. The results indicated that the RC-NFs possessed hydrophilicity， high thermal stability， and excellent tensile mechanical strength （128 MPa）. As the mass fractions of PIP and TMC， and the polymerization time increased， the water flux of RC-NFs gradually decreased， while the ILs rejection rate generally increased. Under the conditions of PIP mass fraction at 0.50%， TMC mass fraction at 0.30%， and polymerization time of 3 min， the prepared RC-NF-6 achieved a ILs rejection rate of 26.18% and a water flux of 4.30 L/（h·m²）， exhibiting an optimal recovery performance for ILs. |
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