Multiphase design of autonomic self-healing thermoplastic elastomers
Multiphase design of autonomic self-healing thermoplastic elastomers
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DOI：
10.1038/nchem.1314
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发表时间：
2012-06-01
期刊：
影响因子：
21.8
通讯作者：
Guan, Zhibin
中科院分区：
文献类型：
--
作者：
Chen, Yulin;Kushner, Aaron M.;Guan, Zhibin
开发能够在机械损伤后自发修复的聚合物将显著提高人造材料的安全性、寿命、能源效率和环境影响。大多数自修复材料的方法需要外部能量、修复剂、溶剂或增塑剂的输入。尽管在这一领域进行了大量的研究，但合成具有内在自我修复能力的刚性材料仍然是一个关键挑战。在这里，我们展示了一种多相超分子热塑性弹性体的设计，其结合了联合收割机的高模量和韧性与自发愈合能力。所设计的氢键刷聚合物自组装成一个硬-软微相分离系统，结合了增强的刚度和韧性的纳米复合材料与动态超分子组件的自我修复能力。与以前的自愈合聚合物相比，这种新系统在环境条件下作为单组分固体材料自发自愈合，而不需要任何外部刺激，愈合剂，增塑剂或溶剂。
The development of polymers that can spontaneously repair themselves after mechanical damage would significantly improve the safety, lifetime, energy efficiency and environmental impact of man-made materials. Most approaches to self-healing materials require the input of external energy, healing agents, solvent or plasticizer. Despite intense research in this area, the synthesis of a stiff material with intrinsic self-healing ability remains a key challenge. Here, we show a design of multiphase supramolecular thermoplastic elastomers that combine high modulus and toughness with spontaneous healing capability. The designed hydrogen-bonding brush polymers self-assemble into a hard-soft microphase-separated system, combining the enhanced stiffness and toughness of nanocomposites with the self-healing capability of dynamic supramolecular assemblies. In contrast to previous self-healing polymers, this new system spontaneously self-heals as a single-component solid material at ambient conditions, without the need for any external stimulus, healing agent, plasticizer or solvent.