104. (Compos. Part B-Eng)Facile preparation, closed-loop recycling of multifunctional carbon fiber reinforced polymer composites
作者：Hongzhi Feng, Xiwei Xu, Binbo Wang, Yi Su, Yanlin Liu, Chuanzhi Zhang, Jin Zhu*, and Songqi Ma*
關鍵字：熱固性樹脂，動態共價交聯高分子，碳纖維，回收，縮醛
論文來源：期刊
具體來源：Composites Part B: Engineering
發表時間：2023年
Recyclable carbon fiber reinforced polymer (CFRP) composites have attracted considerable attention in recent years due to the combined merits of excellent mechanical and thermal properties, recyclability and reprocessability. This paper reports on the successful preparation of closed-loop recyclable CFRP by in-situ polymerization and dynamic cross-linking (ISPDC) technology. The SEM, XPS and monofilament tensile curves were measured to investigate the morphology, chemical details, and mechanical properties of the recycled carbon fiber (CF); the chemical structure of the degraded resin was further characterized and analyzed according to the NMR and FTIR spectra. The obtained results show that under mild acidic conditions, the CFRP was degraded to high-quality recycled CF and linear polymer with methacrylic acid units, which can be used to prepare regenerated CFRP. In addition, due to the dynamic feature of the hemiacetal ester structure in the CFRP matrix, the CFRP also exhibited multiple functions, such as rapid welding, reprocessing, shape shifting, and self-healing, as well as the extremely long shelf life of composite prepregs. Our analysis of the recycling and dynamic exchange processes indicates that the strategy of embedding a releasable linker is dominant for the preparation of closed-loop recyclable and multifunctional CFRP.
論文鏈接：https://doi.org/10.1016/j.compositesb.2023.110677