具有快速自我增强的坚固水凝
Chang Liu1, Naoya Morimoto1, Lan Jiang1
1Material Innovation Research Center (MIRC) and Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan.
Science (New York, N.Y.)
|June 4, 2021
概括
这项研究引入了一种新的,无害的强化策略,用于使用应变诱导结晶的坚固水凝. 该方法实现了聚乙烯糖醇 (PEG) 凝的快速能量回收和优越性,克服了传统的牺牲损伤方法的局限性.
科学领域:
- 材料科学
- 聚合物化学
- 生物材料工程
背景情况:
- 坚固的水凝通常依赖于牺牲结构来消耗能量,但在循环加载时会遭受不可逆转的损伤.
- 这种损伤导致水凝的性在重复使用后显著下降,从而限制了它们的实际应用.
- 现有的强化策略在动态条件下难以快速恢复和保持性能.
研究的目的:
- 开发一种新的,无害的水凝强化策略,
- 调查压力诱导结晶的潜力,作为增强水凝性和能量回收的机制.
- 在循环负荷条件下使用这种策略来评估滑动环凝的性能.
主要方法:
- 使用具有高度定向的聚乙烯糖醇 (PEG) 链的滑动环凝.
- 通过大变形 (延长) 诱导的应变诱导的结晶.
- 在延长和收缩周期中观察到晶体结构的形成和融化.
主要成果:
- 实现了近100%的扩展能量快速回收,证明了无损的增强机制.
- 展现出优异的性值,范围为每立方米6.6至22兆焦.
- 经证明的性比传统交联的同质PEG凝大一级.
结论:
- 压力诱导的结晶提供了一个有效的无害的加强水凝的策略.
- 这种方法显著提高了水凝的性,并使能快速回收能量,超过了传统方法.
- 开发的滑环凝对于需要耐用和弹性软材料的应用非常有前途.
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