用于智能可穿戴弹性纱线的具有抗疲劳和抗老化性能的自愈合聚氨酯/纤维素纳米晶复合纤维

IF 23.2 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES
Sisi Chen, Xin Liu, Yaping Miao, Shengbo Ge, Shi-xiong Li, Lin Liu, Lin Hou, Mashallah Rezakazemi, Tejraj M. Aminabhavi, Wei Fan
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引用次数: 0

摘要

随着智能可穿戴设备的快速发展,人们对具有高应变性、抗疲劳性、柔韧性和耐用性的材料的需求越来越大。聚氨酯(PU)纤维因其灵活的分子结构和可调节的配方而备受关注。然而,传统聚氨酯纤维的抗疲劳性和抗老化性相对较弱,限制了其潜在应用。针对这一问题,本研究提出了一种通过加入环保型纤维素纳米晶体(CNC)制备 PU-CNC 自修复复合纤维的方法。研究发现,聚氨酯分子链与 CNC 表面的羟基产生氢键,形成物理交联的动态网络,从而提高了聚氨酯-CNC 复合纤维的拉伸强度和伸长率、自愈能力以及抗疲劳和抗老化性能。此外,经过抗疲劳和抗老化测试后,PU-CNC 复合纤维的机械特性几乎没有变化。与不含 CNC 的 PU 纤维相比,PU-1% CNC 复合纤维的断裂伸长率和拉伸强度分别提高了 33.92% 和 17.93%。经过划痕试验后,自愈合 PU-1% CNC 复合纤维表面的裂纹消失了,断裂伸长率和拉伸强度分别提高了 57.18% 和 128.02%。这种复合纤维的柔韧性和适应性为柔性传感器和智能可穿戴设备的集成提供了广阔的应用前景,有助于提高未来智能设备的安全性和耐用性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Self-healing polyurethane/cellulose nanocrystal composite fibers with fatigue and aging resistance for smart wearable elastic yarns

With the rapid development of smart wearable devices, there is an increasing demand for materials that exhibit high strain, fatigue resistance, flexibility, and durability. Polyurethane (PU) fibers have gained attention due to their flexible molecular structure and adjustable formulations. However, the fatigue and aging resistance of traditional PU fibers are relatively weak, limiting their potential applications. To address this issue, this study presents a method for preparing PU-CNC self-healing composite fibers by incorporating environmentally friendly cellulose nanocrystals (CNC). It was found that the PU molecular chains create hydrogen bonds with the hydroxyl groups in the surface of CNC, forming a dynamic network with physical crosslinking that enhances the tensile strength and elongation, the self-healing ability, and the fatigue and aging resistance of PU-CNC composite fibers. Moreover, after fatigue and aging resistance tests, the mechanical characteristics of PU-CNC composite fibers are almost unchanged. When compared to PU fibers without CNC, the elongation at break and tensile strength of PU-1% CNC composite fibers increased by 33.92% and 17.93%, respectively. After the scratch test, the cracks on the surface of the self-healing of PU-1% CNC composite fibers disappeared, and the elongation at break and tensile strength increased by 57.18% and 128.02%, respectively. The flexibility and adaptability of this composite fiber provide a broad application prospect for the integration of flexible sensors and smart wearable devices, contributing to enhanced safety and durability in future smart devices.

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来源期刊
CiteScore
26.00
自引率
21.40%
发文量
185
期刊介绍: Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.
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