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| Study on the Effect of Structure-Activity Relationship for Morphology and Dissolution Efficiency Dissolving Pulp of Fibers Treated with Deep Eutectic Solvents |
| Received:September 22, 2025 Revised:November 04, 2025 |
| DOI：10.11981/j.issn.1000-6842.2025.04.12 |
| Key Words:dissolving pulp;cellulose fibers;deep eutectic solvent;fiber morphology structure;dissolution efficiency;Lyocell fiber |
| Fund Project:国家自然科学基金（32171727）；中国轻工集团科技创新基金项目（ZQ2024JC-QN01）；制浆造纸国家工程实验室基金项目（ZZY2024QNRC03）；中国科学技术协会青年人才托举工程（2024QNRC0680）。 |
| Author Name | Affiliation | E-mail | | GUO Yuqian* | China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 | guoyuqian@cnppri.com | | ZHANG Meiwen | China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 | | | SONG Jiayi | China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102 | | | CHENG Yun | China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 | | | HOU Leilei | China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 | | | CHEN Linghua | China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 | | | CHEN Langqian | School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 | | | WANG Jinyu | School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 | | | ZHANG Hongjie* | China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102
National Engineering Lab for Pulp and Paper， Beijing， 100102 | guoyuqian@cnppri.com |
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| Abstract: |
| To improve the homogeneity of the cellulose/N-methylmorpholine-N-oxide(NMMO) solution during Lyocell fiber production， this study investigated the response relationship between three deep eutectic solvents， morphology characteristics， and dissolution efficiency. The pretreatment solvents were choline chloride/oxalic acid， choline chloride/phosphoric acid， and zinc chloride/phosphoric acid， respectively. Among them， the zinc chloride/phosphoric acid system could disrupt the hydrogen bond network of cellulose， reducing intramolecular hydrogen bond content by 26%. Simultaneously， the zinc chloride/phosphoric acid system accelerated the dissociation and dispersion of cellulose fibers， increasing fine contents of dissolving pulp from 3.1% to 62.7%. Moreover， the specific surface area and total pore volume improved by 181% and 70%， respectively. Overall， the zinc chloride/phosphoric acid system shortened the dissolution time from 40 min to 10 min， indicating the superiority of the zinc chloride/phosphoric acid system in deep eutectic solvent pretreatment methods. |
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