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| Preparation of High-strength Moso Bamboo Regenerated Cellulose Fibers via Urea-modified Ionic Liquid |
| Received:July 20, 2026 Revised:August 05, 2026 |
| DOI：10.11981/j.issn.1000-6842.2026.03.23 |
| Key Words:cellulose;ionic liquid;urea;wet spinning;regenerated cellulose fiber |
| Fund Project:国家重点研发计划2024YFD2200802北京市大学生创新创业训练计划S202510022351北京林业大学“5·5工程”科研创新团队项目BLRC2023B01国家重点研发计划（2024YFD2200802）；北京市大学生创新创业训练计划（S202510022351）；北京林业大学“5·5工程”科研创新团队项目（BLRC2023B01）。 |
| Author Name | Affiliation | Postcode | | Meng Miao* | College of Material Science & Technology， Beijing Key Lab of Forest Biomass Chemistry， Ministry of Education Engineering Research Center for Forestry Biomass Materials and Energy， Beijing Forestry University， Beijing， 100083 | 100083 | | Wang Meixin | College of Material Science & Technology， Beijing Key Lab of Forest Biomass Chemistry， Ministry of Education Engineering Research Center for Forestry Biomass Materials and Energy， Beijing Forestry University， Beijing， 100083 | 100083 | | Zhao Hui | College of Material Science & Technology， Beijing Key Lab of Forest Biomass Chemistry， Ministry of Education Engineering Research Center for Forestry Biomass Materials and Energy， Beijing Forestry University， Beijing， 100083 | 100083 | | Li Xin* | College of Material Science & Technology， Beijing Key Lab of Forest Biomass Chemistry， Ministry of Education Engineering Research Center for Forestry Biomass Materials and Energy， Beijing Forestry University， Beijing， 100083 | 100083 | | Xu Feng* | College of Material Science & Technology， Beijing Key Lab of Forest Biomass Chemistry， Ministry of Education Engineering Research Center for Forestry Biomass Materials and Energy， Beijing Forestry University， Beijing， 100083 | 100083 |
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| Abstract: |
| In this study， a novel composite ionic liquid solvent system， urea/1，1，3，3-tetramethylguanidinium propionate （［TMGH］［PA］）， was constructed for the green dissolution of Moso bamboo cellulose and the preparation of high-strength regenerated cellulose fibers （RCF）. The results showed that when the molar ratio of 1，1，3，3-tetramethylguanidine （TMG） to propionic acid （PA） was 7：3， ［TMGH］［PA］ exhibited optimal cellulose dissolution capability， a Moso bamboo dissolved pulp maximum solubility of 10.2% was achieved at 80 °C within 60 min. After adding 0.25% urea， urea primarily formed competitive hydrogen bonds with ［TMGH］+， weakening ion-pair aggregation interations and increasing the concentration of free ions in the ionic liquid， thereby enhancing the maximum cellulose solubility to 13.4%. Urea further regulated the hydrogen-bonding interactions between the ionic liquid and cellulose， improving the rheological behavior of the cellulose solution and fiber-forming stability， promoting fiber densification and reducing surface defects， ultimately increasing the tensile strength of RCF from 135 MPa （without urea） to 175 MPa. |
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