The properties of infusibility and insolubility in organic solvent of cured epoxy resin makes it difficult to recycle carbon fiber reinforced plastics (CFRP). We have reported the recycling of CFRPs using the oxidizing power of hydroxyl radicals generated from NaOCl solution. In our study, we used benzyltrimethylammonium bromide (BTAB) and sodium dodecyl sulfate (SDS) for the interfacial separation between the epoxy resin and carbon fibers (CF). The surfactant system maximized recycling efficiency in both pretreatment and the main reaction of the CFRP recycling process. In the second step, the reaction time to successfully reclaim the CFs was much shorter, only one hour, compared with the two-hour reaction time for the non-SDS process previously reported by us. Scanning electron microscope images and Raman analyses showed that the surface of the reclaimed CF (r-CFs) was clean and smooth without any defects, and there was no significant structural change compared to virgin CF (v-CFs). The tensile strength of r-CF was 3.42 GPa which is 96.9% of the v-CF. Thus, the CFRP recycling process using SDS not only results in r-CF with good mechanical and physical properties, but also increases recycling efficiency by reducing the time.

固化环氧树脂的不溶性和在有机溶剂中的不溶性使得难以回收碳纤维增强塑料（CFRP）。我们已经报道了利用NaOCl溶液产生的羟基自由基的氧化能力回收CFRP。在我们的研究中，我们使用苄基三甲基溴化铵（BTAB）和十二烷基硫酸钠（SDS）进行环氧树脂和碳纤维（CF）之间的界面分离。表面活性剂体系在CFRP回收过程的预处理和主要反应中均使回收效率最大化。在第二步中，成功回收CF的反应时间比我们之前报道的非SDS工艺的2小时反应时间要短得多，仅为1小时。扫描电子显微镜图像和拉曼分析表明，回收的CF（r-CFs）表面干净，光滑，没有任何缺陷，与原始CF（v-CFs）相比，没有明显的结构变化。r-CF的拉伸强度为3.42 GPa，是v-CF的96.9％。因此，使用SDS的CFRP回收工艺不仅可以使r-CF具有良好的机械和物理性能，而且可以通过减少时间来提高回收效率。