环境友好的交联聚合物网络具有可降解的共价键或非共价键,其中许多表现出动态特征。这些属性可以方便地降级,容易的可重复处理性,和自我修复能力。然而,这些交联键的固有不稳定性通常会损害聚合物网络的机械性能,限制其实际应用。在这种情况下,环境友好的双交联聚合物网络(称为EF-DCPN)已成为解决这一挑战的有希望的替代品。这些材料有效地平衡了对高机械性能和降解能力的需求,回收,和/或自我治愈。尽管他们有很大的潜力,对EF-DCPN的调查仍处于起步阶段,一些差距和限制仍然存在。这篇综述提供了综合的全面概述,属性,EF-DCPNs的最新进展和应用。首先,具有两种不同类型的动态键的多种EF-DCPN的合成路线(即,亚胺,二硫化物,酯,氢键,协调债券,和其他债券)的推出。随后,复杂的结构和动态性质相关的机械,热,并讨论了EF-DCPNs的电性能,其次是它们在电子和生物技术中的示范性应用。最后,概述了这一快速发展领域未来的研究方向。
Environmentally friendly crosslinked polymer networks feature
degradable covalent or non-covalent bonds, with many of them manifesting dynamic characteristics. These attributes enable convenient degradation, facile reprocessibility, and self-healing capabilities. However, the inherent instability of these crosslinking bonds often compromises the mechanical properties of polymer networks, limiting their practical applications. In this context, environmentally friendly dual-crosslinking polymer networks (denoted EF-DCPNs) have emerged as promising alternatives to address this challenge. These materials effectively balance the need for high mechanical properties with the ability to degrade, recycle, and/or self-heal. Despite their promising potential, investigations into EF-DCPNs remain in their nascent stages, and several gaps and limitations persist. This Review provides a comprehensive overview of the synthesis, properties, and applications of recent progress in EF-DCPNs. Firstly, synthetic routes to a rich variety of EF-DCPNs possessing two distinct types of dynamic bonds (i.e., imine, disulfide, ester, hydrogen bond, coordination bond, and other bonds) are introduced. Subsequently, complex structure- and dynamic nature-dependent mechanical, thermal, and electrical properties of EF-DCPNs are discussed, followed by their exemplary applications in electronics and biotechnology. Finally, future research directions in this rapidly evolving field are outlined.