组装改性碳纤维增强聚醚醚酮复合材料的摩擦学性能

The Tribological Properties of PEEK Composites Reinforced by Assembled Modification of Carbon Fiber

采用十八烷基磷酸酯对碳纤维表面进行组装改性,用红外光谱仪对改性前后的碳纤维进行表征,并测量其静态接触角;研究组装改性碳纤维增强PEEK复合材料的摩擦学性能。结果表明:纯十八烷基磷酸酯组装改性的碳纤维粉体接触角高达120°,展现强疏水性;干摩擦条件下,组装改性碳纤维增强复合材料磨损率表现出先降低后升高的趋势,碳纤维质量分数为10%时磨损率和摩擦因数均达到最低,并且纯十八烷基磷酸酯改性效果最好,改性后的复合材料磨损面光滑,耐磨性能明显提高。

Octadecyl phosphate（C18P） was used for the surface modification of assembly of the carbon fiber.FTIR was used to characterize the carbon fiber（CF） before and after modification,and the static contact angle of carbon fiber was measured.The tribological properties of the polyetheretherketone（PEEK） composites reinforced by modified CF were inves- tigated.The results show that the water contact angle of pure octadecyl phosphate （P） assembled CF is up to 120°, showing strong hydrophobicity.Under dry friction condition, the wear rate of PEEK composites reinforced by modified CF shows a rising trend after the first reduction.When the content of CF is 10% ,the wear rate and friction coefficient of composites reach the lowest value,and the pure P shows the best modification effect on the CF.The worn surface of P modified CF/ PEEK composite is smooth, and the wear resistance is increased remarkably.