通过动态分子锁定启动的受骨启发的应力增益弹性体
Yang Wang1, Qingbao Guan1, Yue Guo1
1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, Research Base of Textile Materials for Flexible Electronics and Biomedical Applications (China Textile Engineering Society), Shanghai Engineering Research Center of Nano Biomaterials and Regenerative Medicine, Donghua University, Shanghai 201620, P. R. China.
Science advances
|March 22, 2024
概括
这项研究引入了一种灵感来自骨的概念,以增强弹性体的机械性能. 通过使用动态聚氧氨,材料在重复的应力负荷下获得强度,克服了典型的材料限制.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 生物材料工程 生物材料工程
背景情况:
- 材料通常在压力下降解,限制其性能和寿命.
- 开发能够在机械应力下得到改善的材料是一个重大的科学挑战.
- 弹性体通常在重复应力负荷下表现出降低的机械性能.
研究的目的:
- 引入一种新的应力增益概念,以提高弹性体的机械性能.
- 设计和合成具有对齐的中位相域的动态聚氧-氨.
- 调查压力诱导弹性质增强在弹性质的分子机制.
主要方法:
- 具有中相域的动态多分子 (?? 氧 - 尿素) 网络的分子设计.
- 在循环加载前后进行机械测试 (拉伸模量和强度).
- 在应力应用过程中分析动态的氧化物-尿氨键行为.
主要成果:
- 在四轮机械训练后,拉伸模量提高了1744倍,拉伸强度提高了49.3倍.
- 在压力下证明了中相域的对齐和动态键重组.
- 实现了显著的"压力获取"效果,将破坏性压力转化为性能增强剂.
结论:
- 提出的以骨头为灵感的分子概念通过重复的应力负荷有效地提高了弹性体的机械性能.
- 具有中相域的动态聚氧氨) 提供了一个可行的途径,用于创建自我强化的材料.
- 这项研究为具有优越耐用性和性能的创新材料在苛刻的应用中开辟了道路.
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