关键词:
Carbon fiber
Composites
Interface modifications
Polyetheretherketone
摘要:
Carbon fiber (CF) was modified using a PEI sizing agent and a PAMAM coupling agent to enhance the interfacial bonding strength in carbon fiber/polyetheretherketone (CF/PEEK) composites. Pure polyetheretherketone (PEEK) and CF/PEEK composites were fabricated via hot-press sintering. The study investigated the interfacial characteristics, mechanical performance, and tribological behavior of the composites both pre- and post-modification. Results indicated that the surface energy of the CF filler increased by 30.9% after PEI sizing modification and by 10.58% following treatment with the PAMAM coupling agent, relative to unmodified CF. In friction and wear tests conducted at a constant speed of 200 r/min, the friction coefficient and wear rate for PAMAM-CF/PEEK and PEI-CF/PEEK decreased by 11.63% and 72.34%, and 11.51% and 75.58%, respectively, compared to unmodified CF/PEEK. Under a fixed load of 90 N, similar reductions were observed: 15.1% and 52.53%, and18.78% and 63.04%, respectively. These results demonstrate improved interfacial bonding strength and tribological performance in the modified composites. Overall, CF/PEEK composites modified with PEI sizing exhibited superior interfacial bonding strength and tribological properties compared to those treated with the PAMAM coupling agent. © 2025 Science Press. All rights reserved.