In this study, a novel two-step thermolysis method was proposed to recycle the carbon fibers with excellent properties from the wastes of carbon fiber-reinforced polymer composites (CFRP). The epoxy resins on carbon fiber surface were decomposed at the first step, followed by the oxidation of the char at the second step. The carbon fibers were successfully recovered by microwave and traditional two-step thermolysis with the recovery ratio of 94.49% and 93.47%, respectively. The recovered carbon fibers (RCF) were characterised using thermogravimetric analysis (TGA), field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Fourier-transformed infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). Compared with the traditional heating method, the microwave heating method demonstrated the merits of faster operation, higher recovery ratio and less energy consumption.

在这项研究中，提出了一种新颖的两步热解方法，以从碳纤维增强聚合物复合材料（CFRP）的废料中回收具有优异性能的碳纤维。碳纤维表面上的环氧树脂在第一步分解，然后在第二步将炭氧化。通过微波和传统的两步热解法成功地回收了碳纤维，回收率分别为94.49％和93.47％。使用热重分析（TGA），场发射扫描电子显微镜（FESEM），X射线衍射（XRD），傅立叶变换红外光谱（FTIR）和X射线光电子能谱（XPS）对回收的碳纤维（RCF）进行表征）。与传统的加热方式相比