Research results revealed that controlled thermal re-exposure of preconsumed recycled carbon fiber (RCF) increases the formation of a graphitic core and consequently a higher modulus recycled carbon fiber. Furthermore, formation of acidic functionality on carbon during thermal treatment led to improved adhesion with plastic. Transportation lightweighting is shaping the future of mobility and becomes focus of many original equipment manufacturers (OEMs) for many segments as an answer for efficient products. Thermogravimetric analysis (TGA) showed that RCF can resist temperatures up to 400°C without surface degradation, 50°C lower than virgin carbon fiber (VCF), and total treatment weight loss was measured. Fourier-transform infrared spectroscopy (FTIR) results showed acidic groups on thermally treated RCF surface that improved chemical adhesion compared with non-treated RCF. Finally, X-ray photoelectron spectroscopy (XPS) showed the oxygen/carbon ratios, and its perspective deconvolutions were compared with FTIR results. Lower C1s content was found on RCF structure because of thermal treatment. XPS results evidenced the formation of aromatic carbon rings during thermal treatment, further supported by thermogravimetric results. Thus, the thermal process promoted increase in the formation of a graphitic core and consequently a higher modulus RCF.

研究结果表明，对预消耗的回收碳纤维（RCF）进行可控的热再暴露可增加石墨芯的形成，从而提高模量的回收碳纤维。此外，在热处理期间在碳上形成酸性官能团导致与塑料的粘合性提高。运输轻量化正在塑造移动性的未来，并成为许多细分市场的许多原始设备制造商（OEM）的关注焦点，以寻求高效产品。热重分析（TGA）表明，RCF能够抵抗高达400°C的温度而不会发生表面降解，比原始碳纤维（VCF）低50°C，并测量了总处理重量。傅立叶变换红外光谱（FTIR）结果表明，与未处理的RCF相比，热处理过的RCF表面上的酸性基团改善了化学附着力。最后，X射线光电子能谱（XPS）显示了氧/碳比，并将其透视解卷积与FTIR结果进行了比较。由于热处理，在RCF结构上发现较低的C1s含量。XPS结果证明了在热处理过程中形成了芳族碳环，并得到了热重分析的进一步支持。因此，热过程促进了石墨芯的形成的增加，并因此促进了更高模量的RCF。由于热处理，在RCF结构上发现较低的C1s含量。XPS结果表明热处理过程中形成了芳族碳环，而热重分析结果进一步证明了这一点。因此，热处理促进了石墨芯的形成的增加，因此促进了较高模量的RCF。由于热处理，在RCF结构上发现较低的C1s含量。XPS结果证明了在热处理过程中形成了芳族碳环，并得到了热重分析的进一步支持。因此，热处理促进了石墨芯的形成的增加，因此促进了较高模量的RCF。