随着碳纤维/酚醛树脂(CF/PF)复合材料的广泛应用,对CF与PF基体界面结合效果的要求越来越高。为了提高CF与PF基体的界面结合效果,对CF和碳纳米管(CNTs)进行表面酸氧化处理和硅烷偶联剂改性,然后作为增强体与PF基体复合,得到CNTs-CF增强PF基复合材料(CNTs-CF/PF)。通过宏观和微观方法对复合材料进行分析测定,结果表明,硅烷偶联剂能够有效活化CF和CNTs表面,改善CF表面化学惰性和CNTs易团聚的劣势,提高CF、CNTs和PF基体之间的界面结合强度,从而提高复合材料的摩擦性能。改性后的复合材料表现出优异的摩擦性能,磨损率由11.89×10-13m3/(N·m)降低到5.83×10-13m3/(N·m)。
With the wide application of carbon fiber/phenolic resin (CF/PF) composites,the requirements for the interfacial bonding effect between carbon fiber and matrix are getting higher and higher.In order to improve the interfacial binding effect between CF and PT matrix,CF and carbon nanotubes (CNTs) were subjected to surface acid oxidation treatment and silane coupling agent modification,and then composited with PF matrix as reinforcement to obtain CNTs-CF reinforced PF matrix composites.The composites were analyzed and determined by macroscopic and microscopic methods.The results showed that the silane coupling agent effectively activated the surface of CF and CNTs,improved the chemical inertness of CF surfaces and the disadvantage of CNTs being easy to be agglomerated,and increased the interfacial bonding strength among CF,CNTs and PF matrix,thus improving the friction performance of the composites.The modified composites exhibited excellent friction performance,and the wear rate was reduced from 11.89×10-13m3/(N·m) to 5.83×10-13m3/(N·m).
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基金资助
西安市科技局项目(2022JH-RY FW-0045);陕西省重点研发计划项目(2023-YBGY-466);陕西省秦创原“科学家+工程师”队伍建设项目(2022KXJ-013)
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