Basic physicochemical processes governing self‐healable polymers †
Basic physicochemical processes governing self‐healable polymers †
复制标题
控制自修复聚合物的基本物理化学过程 –
DOI：
10.1002/pi.6321
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发表时间：
2022
影响因子：
3.2
通讯作者：
Urban, Marek W.
中科院分区：
文献类型：
--
作者：
Wang, Siyang;Urban, Marek W.
这篇简短的评论概述了可用于开发自修复聚合物的基本化学和物理原理。物理过程包括聚合物链的相互扩散、相分离形态的引入、形状记忆效应或将活性纳米粒子掺入聚合物基质中。动态共价键、自由基键或超分子键主要是化学过程。然而，自愈也将涉及物理和化学事件的组合，例如利用增强的范德华力产生叉指状共聚物形态或嵌入的反应性封装流体，这些流体在损坏时破裂以填充伤口。在精确设计的商品聚合物中，在保持高强度和刚度的同时，还可以在环境条件下实现足够的分子流动性以实现自主自愈。损伤期间存储的构象熵能或损伤导致的表面能过剩的有效存储和恢复将通过使伤口变浅和变宽直至愈合来减少损伤时产生的新生成的界面。 © 2021 工业化学学会。
This short review outlines basic chemical and physical principles that can be utilized in the development of self‐healing polymers. Physical processes include the interdiffusion of polymer chains, the introduction of phase‐separated morphologies, shape memory effects or incorporating active nanoparticles into a polymer matrix. Dynamic covalent, free radical or supramolecular bonds are predominantly chemical processes. However, self‐healing will also involve a combination of physical and chemical events, such as taking advantage of enhanced van der Waals forces resulting in inter‐digitated copolymer morphologies or embedded reactive encapsulated fluids that burst open upon damage to fill up a wound. Sufficient molecular mobility for autonomous self‐healing under ambient conditions can also be achieved while maintaining high strength and stiffness in precisely designed commodity polymers. The efficient storage and recovery of conformational entropic energy stored during damage or excess of surface energy resulting from damage will drive the reduction of newly generated interfaces created upon damage by shallowing and widening wounds until healed. © 2021 Society of Industrial Chemistry.