This review intends on chemical recycling of the carbon fiber-reinforced epoxy resin composites (CFREPs) for future applications. Many recycling methods were investigated such as chemical, solvolysis, glycolysis and hydrolysis. Mechanical recycling produces poor-quality carbon fibers (CFs) which exhibits short length and lower tensile modulus, whereas thermal recycling process, especially pyrolysis, gives fibers with char formation on the surface. Among them, the most promising is chemical recycling, as CFs can be recycled from CFREPs very easily and in most environmentally favorable conditions. Additionally, recent approach of chemical recycling with supercritical fluids in which no mechanical degradation occurs was also reviewed. It comes under green reaction media as they are easily available, less expensive, less toxic, soluble in different organic and inorganic compounds, and distillation process can be introduced to recycle afterward also. An economical approach of chemically recycling thermoset epoxy resin is also considered. Various greener approach methods of chemical recycling and its advantages over various other recycling processes were discussed in details, and finally structural and nonstructural applications of recycled carbon fibers are discussed.

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通过化学回收利用环氧复合材料回收碳纤维的前景：回顾

这篇综述旨在对碳纤维增强环氧树脂复合材料（CFREP）进行化学回收，以备将来应用。研究了许多回收方法，例如化学，溶剂分解，糖酵解和水解。机械回收会产生劣质的碳纤维（CFs），该碳纤维长度短且拉伸模量较低，而热回收过程（尤其是热解过程）会在表面形成焦炭。其中，最有前途的是化学回收，因为可以很容易地在最有利于环境的条件下从CFREP中回收CF。另外，还回顾了使用超临界流体进行化学再循环的最新方法，其中没有发生机械降解。它属于绿色反应介质，因为它们易于获得，价格便宜，毒性较小，可溶于不同的有机和无机化合物中，然后可以引入蒸馏工艺进行循环利用。还考虑了化学回收热固性环氧树脂的经济方法。详细讨论了化学回收的各种绿色方法及其相对于其他各种回收方法的优势，最后讨论了回收碳纤维的结构和非结构应用。