Liu Tuan, Shao Lin, Zhao Baoming, Chang Yu-Chung, Zhang Jinwen
School of Mechanical and Materials Engineering, Composite Materials and Engineering Center, Washington State University, Pullman, WA, 99164, USA.
School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.
Macromol Rapid Commun. 2022 Dec;43(23):e2200538. doi: 10.1002/marc.202200538. Epub 2022 Sep 15.
Carbon fiber reinforced polymer (CFRP) composites are indispensable in a variety of applications, because of their high specific strength. CFRPs are generally constructed by carbon fibers as reinforcements and crosslinked polymers as binders. Due to the irreversible nature of the crosslinked polymers, CFRPs are neither repairable nor recyclable. Once the material is damaged or out of service, landfill or incineration is the typical way to deal with the waste. These methods take no advantages of the residue value of the waste and add burdens to the environment. To reduce waste and cost, it is desirable to develop effective recycling technologies to reserve the residue value of carbon fiber and polymer matrix. In the past decade, chemical recycling by cleaving the covalent bonds in a solvent has been considered as an ideal path for the recycling of CFRP wastes, because it has the potential to recover both valuable CFs and polymer matrix. In this review, the discussion is focused on the progress in the chemical recycling of CFRP. The primary matrix resin of CFRP discussed in this review is epoxy resin which is the most widely used polymer matrix. In addition, the challenges and outlook are provided.
碳纤维增强聚合物（CFRP）复合材料因其高比强度而在各种应用中不可或缺。CFRP通常由作为增强材料的碳纤维和作为粘合剂的交联聚合物构成。由于交联聚合物的不可逆性质，CFRP既不可修复也不可回收利用。一旦材料受损或不再使用，填埋或焚烧是处理废弃物的典型方式。这些方法没有利用废弃物的残余价值，反而给环境增加了负担。为了减少浪费和成本，开发有效的回收技术以保留碳纤维和聚合物基体的残余价值是很有必要的。在过去十年中，通过在溶剂中裂解共价键进行化学回收被认为是回收CFRP废料的理想途径，因为它有潜力回收有价值的碳纤维和聚合物基体。在这篇综述中，讨论聚焦于CFRP化学回收的进展。本综述中讨论的CFRP的主要基体树脂是环氧树脂，它是使用最广泛的聚合物基体。此外，还提供了挑战和展望。
