| 付时雨,袁熙,罗敏.DES预处理桉木纤维及其与聚氨酯交联塑化改性的研究[J].中国造纸学报,2025,40(3):161-171 |
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| DES预处理桉木纤维及其与聚氨酯交联塑化改性的研究 |
| Research on the DES Pretreatment of Eucalyptus Fibers and Its Cross-linking Plasticized Modification with Polyurethane |
| 投稿时间：2025-07-09 修订日期：2025-07-26 |
| DOI：10.11981/j.issn.1000-6842.2025.03.161 |
| 中文关键词: 桉木 聚氨酯预聚体 可塑性 塑化改性薄膜 |
| Key Words:eucalyptus fiber polyurethane prepolymer plasticity plasticized modified films |
| 基金项目:国家自然科学基金（22078114）；国家重点研发计划政府间国际合作项目（2021YFE0104500）。 |
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| 中文摘要: |
| 通过植物纤维改性塑化制备的复合材料具有环保可持续性，可减少人们对于合成塑料的依赖。本研究以桉木纤维为原料，利用低共熔溶剂（DES）进行预处理，在提高桉木纤维可及性的同时保留纤维素骨架结构及刚性，再通过接枝由1，4-丁二醇（BDO）、六亚甲基二异氰酸酯（HDI）、聚乙二醇（PEG）合成的疏水改性聚氨酯预聚体（BDO-PU），制备具有可塑加工性的木质纤维基塑化改性薄膜。结果表明，当DES预处理桉木纤维与BDU-PU质量比为3∶1时，BDO-PU塑化改性薄膜的拉伸强度可达27 MPa、杨氏模量可达792 MPa，2 h浸泡处理后的湿拉伸强度和湿杨氏模量仍分别保持在22和483 MPa；此时，BDO-PU塑化改性薄膜的表面疏水性有所提升，水接触角为118°、平衡吸水率为63%，并展现出良好的热稳定性及优异的热可塑加工性能。 |
| Abstract: |
| Composite materials prepared by plasticized modifying plant fibers are environmentally friendly and sustainable， which can reduce the reliance on synthetic plastics. Used eucalyptus fibers as raw materials in this study， the deep eutectic solvent （DES） was used for pretreatment to improve the accessibility of eucalyptus fibers while retaining the cellulose framework structure and rigidity. Then， a hydrophobic modified polyurethane prepolymer （BDO-PU） was grafted from 1，4-butanediol （BDO）， hmethylene diisocyanate （HDI）， and polyethylene glycol （PEG）， and the fiber-based plasticized modified films with plastic processability were prepared. The results showed that when the mass ratio of eucalyptus fibers pre-treated with DES to BDU-PU was 3∶1， the tensile strength and the Young’s modulus of the BDO-PU plasticized modified film could reach 27 and 792 MPa， respectively. The wet tensile strength and wet Young’s modulus after 2 h immersion treatment still remained at 22 and 483 MPa， respectively. Under this condition， the surface hydrophobicity of BDO-PU plasticized modified film was enhanced， with a water contact angle of 118° and an equilibrium water absorption rate of 63%. The material exhibited good thermal stability and excellent thermoplastic processing performance. |
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