基于动态双交联网络的具有高机械稳健性、低迟滞性、抗疲劳性和抗菌性的可治愈和可回收的超分子聚氨酯-尿素弹性体

IF 4.1 2区 化学 Q2 POLYMER SCIENCE
Xionghui Wu, Qihui Tang, Yichao Hu, Yaling Lin, Anqiang Zhang
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引用次数: 0

摘要

聚氨酯弹性体具有优异的机械性能、自愈能力、可回收性和多功能性,在组织工程、医疗健康和柔性电子等领域有着广泛的应用。然而,通过现有的网络结构实现机械稳健性、低迟滞性、抗疲劳性、自愈性和可回收性提出了重大挑战。本研究通过将咪唑烷基脲(IU)作为多氢键基序和动态二硫键结合到超分子网络中,开发了具有双动态键的双交联网络的超分子聚氨酯-尿素弹性体。循环拉伸试验结果表明,基于这种结构特征设计策略的超分子聚氨酯-尿素弹性体具有高强度(50.8 MPa)、超高韧性(932 MJ/m3)、优异的断裂能(195.6 kJ/m2)、低迟滞(10.8%)和优异的抗疲劳性能。此外,动态二硫键和可逆氢键双网络使弹性体具有良好的自愈性能和可回收性。此外,由于IU和元素S的协同作用,聚合物膜对革兰氏阳性白色葡萄球菌和革兰氏阴性大肠杆菌也表现出优异的抗菌性能,同时对小鼠成纤维细胞保持低毒性(L929)。此外,由于其稳定的双交联网络,该传感器具有长期稳定性,可以灵敏地检测人体关节的弯曲运动。本研究展示了具有高机械稳健性、低迟滞性、抗疲劳性和抗菌性能的自修复和可回收聚氨酯弹性体的设计,从而为未来医疗和电子材料的发展提供了一种新的途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Healable and recyclable supramolecular poly(urethane-urea) elastomers with high mechanical robustness, low hysteresis, fatigue resistance and antibacterial based on dynamic double crosslinked networks
Polyurethane elastomers, characterized by their exceptional mechanical properties, self-healing capabilities, recyclability, and multifunctionality, have found extensive applications in the fields of tissue engineering, medical health, and flexible electronics. However, attaining mechanical robustness, low hysteresis, fatigue resistance, self-healing, and recyclability through existing network structures presents a significant challenge. In this study, a supramolecular poly(urethane-urea) elastomer featuring a double crosslinked network with dual dynamic bonds is developed by incorporating imidazolidinyl urea (IU) as a multiple hydrogen-bonding motif and dynamic disulfide bonds into supramolecular networks. Owing to this structural feature design strategy, the supramolecular poly(urethane-urea) elastomer exhibits remarkable properties, including high strength (50.8 MPa), ultrahigh toughness (932 MJ/m3), excellent fracture energy (195.6 kJ/m2), low hysteresis (10.8 %), and outstanding anti-fatigue properties, as evidenced by cyclic tensile testing. Furthermore, the dynamic disulfide bond and reversible hydrogen bonding dual networks bestow the elastomers with favorable self-healing properties and recyclability. Additionally, due to the synergistic effect of IU and elemental S, the polymer film also demonstrates excellent antibacterial properties against Gram-positive Staphylococcus albus and Gram-negative Escherichia coli, while maintaining low toxicity to mouse fibroblast cells (L929). Moreover, the fabricated sensor exhibits long-term stability and can sensitively detect the bending motion of human joints, attributable to the stable double crosslinked networks. This study showcases the design of self-healing and recyclable polyurethane elastomers with high mechanical robustness, low hysteresis, fatigue resistance, and antibacterial properties, thereby providing a novel approach for the development of medical and electronic materials in the future.
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来源期刊
Polymer
Polymer 化学-高分子科学
CiteScore
7.90
自引率
8.70%
发文量
959
审稿时长
32 days
期刊介绍: Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.
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