| 诸炜铖,韩学文,王沛云,陈华,胡志军.磨浆预处理与纤维骨架强化协同溶解再生构筑天丝纤维素隔膜的研究[J].中国造纸,2026,45(10):92-98 |
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| 磨浆预处理与纤维骨架强化协同溶解再生构筑天丝纤维素隔膜的研究 |
| Study on Construction of Lyocell Cellulose Separators via Synergistic Dissolution and Regeneration With Refining Pretreatment and Fiber Skeleton Reinforcement |
| 收稿日期：2026-06-12 修订日期：2026-07-10 |
| DOI：10.11980/j.issn.0254-508X.2026.10.011 |
| 关键词: 天丝纤维素 碱硫脲溶剂 隔膜 磨浆 细菌纤维素 |
| Key Words:tencel fiber NaOH/urea/thiourea aqueous solvent system membrane refining bacterial cellulose |
| 基金项目:2024年浙江省尖兵·领雁项目 2024C03120龙游县重点科技计划项目 20251082024年浙江省尖兵·领雁项目（2024C03120）；龙游县重点科技计划项目（No.2025108）。 |
| 作者 | 单位 | 邮编 | | 诸炜铖* | 浙江科技大学环境与资源学院,浙江杭州,310023 | 310023 | | 韩学文 | 浙江科技大学环境与资源学院,浙江杭州,310023 | 310023 | | 王沛云 | 浙江科技大学环境与资源学院,浙江杭州,310023 | 310023 | | 陈华 | 浙江科技大学环境与资源学院,浙江杭州,310023 | 310023 | | 胡志军* | 浙江科技大学环境与资源学院,浙江杭州,310023 | 310023 |
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| 摘要:本研究以天丝纤维为原料，采用氢氧化钠/尿素/硫脲水溶液体系结合非溶剂诱导相分离法制备天丝纤维素隔膜，系统研究了PFI磨浆处理、部分溶解后保留的未溶解纤维骨架，以及完全溶解后复合外源细菌纤维素（BC）纳米骨架对纤维素隔膜结构与性能的影响。结果表明，PFI磨浆预处理与部分溶解制膜可显著提升纤维素隔膜的力学性能，其拉伸强度最高达62.5 MPa，明显优于未磨浆所制纤维素隔膜。在完全溶解纤维素溶液中添加2%（相对于绝干纤维质量）BC后，所得纤维素隔膜拉伸强度进一步提高至75.2 MPa，其Li+迁移数达0.68，离子电导率达1.02 mS/cm，表现出良好的锂电池隔膜应用潜力。 |
| Abstract:In this study， cellulose membranes were prepared from tencel cellulose using a NaOH/urea/thiourea aqueous solution system combined with a non-solvent-induced phase separation method. The effects of PFI refining， the retained undissolved fiber skeleton after partial dissolution， and the incorporation of an exogenous bacterial cellulose (BC) nanofiber skeleton after complete dissolution on the structure and properties of the cellulose membranes were systematically investigated. The results showed that PFI refining pretreatment combined with partial dissolution significantly improved the mechanical properties of the cellulose membranes， with the tensile strength reaching a maximum of 62.5 MPa， which was substantially higher than that of the unrefined membrane. After introducing 2% BC (based on the oven-dry fiber mass) into the completely dissolved cellulose solution， the tensile strength of the resulting cellulose membrane was further increased to 75.2 MPa. The Li+ migration number was 0.68 and an ionic conductivity of 1.02 mS/cm， demonstrating good potential for application as a lithium-ion battery separator. |
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