汽车B柱热固性复合材料加强板的制造与回收

Composite is the most promising material for achieving structural lightweight. Thermosetting composites have excellent mechanical properties and chemical stability， but their remanufacturing and recycling are extremely challenging. In this work the manufacturing and recycling methods for the thermoset composite support plate of car B-pillar are studied. The basic idea is to introduce dynamic covalent bonds into thermosetting composites， and achieve manufacturing and recycling of thermosetting resin based composite reinforcement plates through layer by layer laying and hot pressing of carbon fiber prepreg. Compared with steel reinforced plates， the prepared thermoset composite reinforced plates reduce weight by more than 50%， and the peak impact force of composite B columns is reduced by more than 30%. The non-destructive full recovery of carbon fibers in thermosetting composite reinforcement plates has been achieved， and the uniaxial tensile strength retention rate of the recovered resin exceeds 95%. This study provides a new approach for manufacturing lightweight and recyclable thermosetting resin based composite automotive components， which can be extended to other related fields.