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| Study on Enhancing the Reactivity of Dissolving Pulp Using Ball Milling-assisted Deep Eutectic Solvents |
| Received:September 19, 2025 Revised:September 26, 2025 |
| DOI：10.11981/j.issn.1000-6842.2025.04.01 |
| Key Words:dissolving pulp;deep eutectic solvents;ball milling;cellulose acetate |
| Fund Project:国家自然科学基金项目（22308027）；北京林业大学“5·5工程”科研创新团队项目（BLRC2023B01）。 |
| Author Name | Affiliation | Postcode | | 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 | | GAO Zijun | 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 | | QIU Haohan | 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 | | 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， the refined cotton dissolving pulp was treated using ball milling in combination with five deep eutectic solvents (DES)， and the treated pulp was used as the raw material to prepare cellulose acetate (CA) and its film materials. The results demonstrated that this combined approach synergistically promoted fiber fibrillation and cellulose depolymerization， effectively disrupting the fiber morphology and hydrogen bond network. This led to a reduction in the degree of polymerization (DP) and crystallinity， thereby significantly enhancing its reactivity. After treatment with choline chloride/oxalic acid DES， the DP of the pulp decreased from 1 227 to 572， the crystallinity dropped from 80.1% to 71.3%， and the content of intramolecular hydrogen bond O(3)H⋯O(5) declined from 62.43% to 46.79%. The obtained CA films exhibited excellent light transmittance and mechanical properties. The films derived from choline chloride/acetic acid DES-treated pulp showed the highest mechanical performances， with tensile strength at break and strain at break reaching (60.8±1.2) MPa and (12.6±0.3)%， respectively. |
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