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| Cellulose Sponges Grafted with High-density Cationic Polymeric Ionic Liquids: Synthesis and Adsorption Performance |
| Received:February 26, 2025 Revised:March 06, 2025 |
| DOI：10.11981/j.issn.1000-6842.2025.04.101 |
| Key Words:cellulose;polymeric ionic liquid;adsorption;methyl orange;grafting modification |
| Fund Project:国家自然科学基金项目（22308283）；陕西省教育厅青年创新团队基金项目（24JP198）；西京学院“大学生创新创业训练计划”项目（X202312715091）。 |
| Author Name | Affiliation | E-mail | | SONG Wenqi* | Technological Institute of Materials & Energy Science （TIMES）， Shaanxi Key Lab of Liquid Crystal Polymer Intelligent Display， Xi’an Key Lab of Advanced Photo-Electronics Materials and Energy Conversion Device， Xijing University， Xi’an， Shaanxi Province， 710123
School of Electronic Information， Xijing University， Xi’an， Shaanxi Province， 710123 | songwenqi@xijing.edu.cn | | FU Zepeng | School of Electronic Information， Xijing University， Xi’an， Shaanxi Province， 710123 | | | REN Zhihua | School of Electronic Information， Xijing University， Xi’an， Shaanxi Province， 710123 | | | PENG Qin | School of Electronic Information， Xijing University， Xi’an， Shaanxi Province， 710123 | | | ZHU Xueyao | School of Electronic Information， Xijing University， Xi’an， Shaanxi Province， 710123 | | | WANG Siyu | School of Electronic Information， Xijing University， Xi’an， Shaanxi Province， 710123 | | | YANG Chenglin | School of Electronic Information， Xijing University， Xi’an， Shaanxi Province， 710123 | | | LI Peirui | School of Electronic Information， Xijing University， Xi’an， Shaanxi Province， 710123 | | | YANG Miaoxiu | China National Pulp and Paper Research Institute Co.， Ltd.， Beijing， 100102 | |
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| Abstract: |
| In this study， a high-density cationic poly(ionic liquid)-grafted cellulose sponge (CS-PAPIM-co-PBBIM) was fabricated and employed as a novel cellulose-based adsorbent. Two functional ionic liquid monomers， 1-vinyl-3-(3-ammoniumpropyl) imidazolium dibromide and bis-1-vinyl-3，3’-(1，4-phenylmethylene) imidazolium dichloride， were rationally designed and synthesized， and subsequently grafted onto the cellulose sponge surface through reversible addition-fragmentation chain-transfer (RAFT) polymerization. This surface modification markedly enhanced the adsorption performance of the material toward methyl orange (MO). The optimized CS-PAPIM-co-PBBIM exhibited a high adsorption capacity of 312 mg/g for MO. Mechanistic analysis revealed the presence of multiple types of adsorption sites on the adsorption material surface， where electrostatic attraction between the poly(ionic liquid) layer and MO served as the dominant driving force， and π-π stacking interactions together with hydrophobic interactions synergistically facilitated chemisorption. Moreover， after five adsorption-desorption cycles， the adsorbent maintained over 85% of its initial adsorption capacity， demonstrating excellent regeneration ability and cycling stability. |
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