自愈和热可逆来自于超分子组合的自愈和热可逆
Philippe Cordier1, François Tournilhac, Corinne Soulié-Ziakovic
1Matière Molle et Chimie, UMR 7167 CNRS-ESPCI, Ecole Supérieure de Physique et Chimie Industrielles, 10 rue Vauquelin, 75005 Paris, France.
Nature
|February 22, 2008
概括
研究人员开发了使用键的自愈. 这些新型材料具有特殊的伸展性,抗,并且可以在室温下多次修复,为可持续的应用铺平了道路.
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
- 超分子化学 超分子化学
背景情况:
- 由于宏分子网络,具有显著的伸展性和形状恢复性.
- 传统的依赖于共价交联或物理关联来防止流动和爬行.
- 现有的自我修复和可回收材料往往涉及复杂的合成或有限的特性.
研究的目的:
- 设计和合成能够通过键形成聚合物链和交叉链的新型分子系统.
- 研究这些结材料的机械性能,包括伸展性和爬行性.
- 评估在室温下合成材料的自我修复能力和可回收性.
主要方法:
- 设计用于通过键形成超分子网络的分子的合成.
- 机械测试以确定伸展性 (高达数百%) 和负载下爬行.
- 通过在室温下破碎和重新连接样本来评估自我愈合的效率.
- 评估可回收性和可加工性.
主要成果:
- 成功设计和合成了可以自组装成结网络的分子,模仿的弹性.
- 在负载下实现可回收的延伸度高达数百%,爬行速度最小.
- 在骨折时在室温下表现出高效的自我愈合,机械性能完全恢复.
- 证实了多次重复断裂和愈合过程的能力,表明了出色的耐用性和可回收性.
结论:
- 结合的分子系统可以有效地复制传统的特性,包括高伸展性和弹性.
- 这些新型材料在室温下表现出前所未有的自我愈合能力,使其易于维修和重复使用.
- 从可再生资源 (脂肪酸和尿素) 直接合成和低成本表明可持续材料应用的巨大潜力.
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