Effect of Modified Carbon Fibers on Mechanical Properties and Wear Resistance of Polyphenylene Oxide Composites
Polyphenylene oxide(PPO)composites were prepared by surface modification of carbon fibers with polydopamine(PDA).The modified carbon fibers were used as fillers to investigate the effects of different filler ratios on the mechanical and friction properties of the composites.The results show that the mechanical properties and wear resistance of PPO composites are improved by adding PDA modified carbon fiber.When the amount of modified carbon fiber added is 4%,the tensile strength of PPO composite increases by 20%compared to pure PPO material,and the elongation at break is maintained at 123%,the impact strength is 14.5 kJ/m2,and the interlayer shear strength is 32 MPa.As the amount of modified carbon fiber added increases,the friction coefficient of the composites shows a trend of first increasing and then decreasing,and reaches its highest point when the amount of modified carbon fiber added is 4%.
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