Hyperbranched polyester catalyzed self-healing bio-based vitrimer for closed-loop recyclable carbon fiber-reinforced polymers

编号 020036304

推送时间 20221003

研究领域 林产化工 

年份 2022 

类型 期刊 

语种 英语

标题 Hyperbranched polyester catalyzed self-healing bio-based vitrimer for closed-loop recyclable carbon fiber-reinforced polymers

来源期刊 Composites Science and Technology

期 第363期

发表时间 20220929

关键词 Carbon fiber-reinforced polymers;  Rosin;  Bio -based vitrimer;  Autocatalysis;  Closed-loop recycling; 

摘要 Closed-loop recycling in the matrix resin and carbon fibers (CFs) of carbon fiber-reinforced polymers (CFRPs) is a major challenge. To solve this problem, herein, a closed-loop recyclable vitrimer matrix containing hydroxyterminated hyperbranched polyesters (HBPs), rosin-derived fumaropimaric acid (FPA), and glycerol triglycidyl ether (GTE) is prepared. The FPA/GTE/HBP vitrimers exhibited excellent mechanical properties owing to the highly reactive hydroxyterminated HBP and rigid FPA. The abundant hydroxyl groups of HBP catalyzed the dynamic transesterification reaction of the vitrimer network, resulting in self-healing and reprocessing proper-ties. In addition, FPA/GTE/HBP-CF composites exhibited high mechanical strength and interlayer shear strength owing to the presence of HBP. FPA/GTE/HBP15-CF was degraded by ethylene glycol during the catalytic operation of the hydroxy-terminated HBP, and the degraded matrix could be closed-loop recycled. Scanning electron microscopy, Raman analysis, and tensile testing showed that the degradation reaction did not degrade the properties of the recycled CFs. This study presents an environmentally-friendly strategy for pre -paring closed-loop recyclable CFRPs.

服务人员 尚玮姣

服务院士 宋湛谦

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