Shahriari Leila, Kim Sungjin
Department of Chemical and Biological Engineering, University of New Mexico, Albuquerque, NM, 87131, USA.
Macromol Rapid Commun. 2025 May 7:e2401011. doi: 10.1002/marc.202401011.
The global production of plastics has reached unprecedented levels, with <10% being recycled and even fewer recycled more than once. This lack of circularity poses critical environmental threats. However, upcycling-recycling materials while improving their properties and functionality-through dynamic bonding strategies offers a promising approach to enhancing polymer sustainability. Dynamic bonds enable polymeric structures to reconfigure under specific conditions, improving thermal, chemical, and mechanical resilience and controllability while facilitating recyclability. This review specifically takes the viewpoint of upcycling existing thermoplastics and thermosets to develop sustainable dynamic covalent networks (DCNs). Integrating these DCN upcycling strategies into the design of additive manufacturing (AM) feedstocks creates unique benefits compared to traditional polymer systems. This approach is briefly highlighted in extrusion-based and light-based AM, assessing the potential for improved material processability, recyclability, and the creation of high-value customized products. The combination of upcycling technologies and AM techniques presents a significant opportunity to advance sustainability in macromolecular science.
全球塑料产量已达到前所未有的水平，其中不到10%被回收利用，而多次回收利用的更少。这种缺乏循环利用的情况对环境构成了严重威胁。然而，通过动态键合策略进行升级回收——在回收材料的同时改善其性能和功能——为提高聚合物可持续性提供了一种很有前景的方法。动态键使聚合物结构能够在特定条件下重新配置，提高热、化学和机械弹性及可控性，同时促进可回收性。本综述特别从升级回收现有热塑性塑料和热固性塑料以开发可持续动态共价网络（DCN）的角度出发。与传统聚合物系统相比，将这些DCN升级回收策略整合到增材制造（AM）原料设计中会带来独特的优势。这种方法在基于挤出和基于光的增材制造中得到了简要强调，评估了改善材料加工性能、可回收性以及制造高价值定制产品的潜力。升级回收技术与增材制造技术的结合为推动高分子科学的可持续发展提供了重大机遇。
