National Local Joint Laboratory for Advanced Textile Processing and Clean Production, State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430073, China.
Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, Hubei University, Wuhan 430062, China.
Int J Biol Macromol. 2024 Aug;274(Pt 2):133550. doi: 10.1016/j.ijbiomac.2024.133550. Epub 2024 Jul 19.
The escalating global population has led to a surge in waste textiles, posing a significant challenge in landfill management worldwide. In this work, ionic liquid 1-butyl-3-methylimidazole acetate ([Bmim]OAc) and DMF (N, n-dimethylformamide) were used as solvents to dissolve waste denim fabric, then vanadium dioxide (VO) nanoparticles were introduced into the spinning solution, and cellulose fibers were regenerated by dry-wet spinning process, to promote the recycling of waste cotton fabric. Finally, regenerated cellulose fibers with high added value were prepared by dry-wet spinning. Through this innovative strategy, on the one hand, because VO can form a large number of hydrogen bonds between the regenerated cellulose molecules, and realize the cross-networking structure of the molecular chains inside the fiber, the mechanical properties of the regenerated cellulose fibers are enhanced. On the other hand, due to the thermal phase transformation characteristics of VO, it also endows the regenerated cellulose fiber unique intelligent temperature control function. Compared with the pristine regenerated fiber, the tensile stress of the regenerated fiber after adding VO nanoparticles (F-VO) increased by 25.6 %, reaching 158.68 MPa. In addition, the F-VO fibric provides excellent intelligent temperature control, reducing temperatures by up to 6.7 °C.
全球人口的不断增长导致废旧纺织品数量激增，给全球垃圾填埋场管理带来了巨大挑战。在这项工作中，我们使用离子液体 1-丁基-3-甲基咪唑醋酸盐 ([Bmim]OAc) 和 DMF（N, n-二甲基甲酰胺）作为溶剂来溶解废旧牛仔布织物，然后将二氧化钒 (VO) 纳米粒子引入纺丝溶液中，通过干湿纺丝工艺再生纤维素纤维，以促进废旧棉织物的回收利用。最后，通过干湿纺丝工艺制备了具有高附加值的再生纤维素纤维。通过这种创新策略，一方面，由于 VO 可以在再生纤维素分子之间形成大量氢键，实现纤维内部分子链的交联网络结构，从而增强了再生纤维素纤维的力学性能。另一方面，由于 VO 的热相变特性，它还赋予了再生纤维素纤维独特的智能温控功能。与原始再生纤维相比，添加 VO 纳米粒子的再生纤维（F-VO）的拉伸应力增加了 25.6%，达到 158.68 MPa。此外，F-VO 纤维还提供了出色的智能温控性能，可将温度降低 6.7°C。
