Work

Modification of carbon fiber by polyacrylonitrile coating and high-temperature carbonizing treatment for enhancing fluororubber’ mechanical and electromagnetic shielding performance

Year: 2025

Type: article

Abstract: In this study, to solve the problem of poor interfacial bonding between carbon fiber (CF) and fluororubber (FKM), the polyacrylonitrile (PAN) coating and high-temperature carbonizing method were proposed to modify the CF. In this method, the PAN nanospheres were compounded with carbon fiber by coating process, and then melted and carbonized to a thin carbon layer attached to the CF surface during the high-temperature carbonizing process. The rough and irregular PAN carbonized layer on C-PAN-CF can greatly enhance the mechanical performance of fluoroelastomer by mechanical riveting effect. The tensile strength, modulus at 100% strain and hardness of FKM/C-PAN-CF improved by 122.0%, 123.5% and 29.2%, respectively. And the compression set reduced to 29.5%. Furthermore, the C-PAN-CF could also raise the FKM’s thermal stability, thermal management performance and Electromagnetic shielding performance (EMI SE). Particularly in the X-band, the composites’ shielding mechanism was mainly based on reflection. In summary, such a simple and effective technique for preparing C-PAN-CF hybrid fibers provides a certain reference for the preparation of reinforcing fillers for high-performance FKM composites.

Source: Journal of Thermoplastic Composite Materials

DOI: 10.1177/08927057251401129