增强体表面改性对碳纤维/聚醚醚酮复合材料摩擦磨损性能的影响  

Effect of Interface Modification on Mechanical Properties and Friction and Wear Properties of Carbon Fiber/Polyetheretherketone Composites

作　　者：唐鸣津 王艺璇 杨晓萱 薛键鑫 王露露 王帅[2] 宋晨飞[2] 陆焕焕 张永振[2] 李杰[2] 逄显娟[1,2] Ming-jin Tang;Yi-xuan Wang;Xiao-xuan Yang;Jian-xin Xue;Lu-lu Wang;Shuai Wang;Chen-fei Song;Huan-huan Lu;Yong-zhen Zhang;Jie Li;Xian-juan Pang(College of Chemistry and Chemical Engineering,Henan University of Science and Technology,Luoyang 471023;National United Engineering Laboratory for Advanced Bearing Tribology,Henan University of Science and Technology,Luoyang 471023)

机构地区：[1]河南科技大学化学化工学院,洛阳471023 [2]河南科技大学高端轴承摩擦学技术与应用国家地方联合工程实验室,洛阳471023

出　　处：《高分子学报》2025年第4期653-667,共15页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号92266205,52105181);宁波市重点研发计划暨“揭榜挂帅”(项目号2023Z006,2022Z050)资助.

摘　　要：采用聚乙烯亚胺(PEI)上浆剂及聚酰胺-胺(PAMAM)偶联剂接枝法分别对碳纤维(CF)进行改性,从而提高碳纤维/聚醚醚酮复合材料的界面结合强度.采用热压烧结法制备了纯聚醚醚酮(PEEK)及改性前后CF/PEEK复合材料.探究改性前后复合材料的界面性能、力学性能,以及在干摩擦条件下的摩擦磨损性能.结果表明:填料CF经PEI上浆及PAMAM接枝改性后,表面能分别比纯PEEK提高了30.9%和10.58%,两种改性对CF/PEEK复合材料的界面结合强度均提高.在摩擦磨损试验中,在固定转速200 r/min的情况下,随着载荷提高,改性后的复合材料的摩擦系数先升高再降低,磨损率逐渐升高.与未改性CF/PEEK复合材料相比,PAMAM-CF/PEEK和PEI-CF/PEEK的摩擦系数和磨损率分别低11.63%、72.34%和11.51%、75.58%,比纯PEEK分别低30.12%、95.17%和25.32%、95.74%.虽然PEI-CF/PEEK的摩擦系数比PAMAM-CF/PEEK高0.84%,但是其磨损率降低了22.13%.在固定载荷90 N的情况下,随着转速的提高,摩擦系数和磨损率均呈现先降低再升高的趋势.PAMAM-CF/PEEK和PEI-CF/PEEK的摩擦系数和磨损率比CF/PEEK分别低15.1%、52.53%和18.78%、63.04%,比纯PEEK分别低25.42%、88.86%和25.32%、91.33%,虽然PEI-CF/PEEK的摩擦系数比PAMAM-CF/PEEK高4.33%,但磨损率降低了28.42%.改性后的复合材料在界面结合强度与摩擦磨损性能方面均有改善,且经PEI上浆改性的CF/PEEK复合材料的综合性能优于经PAMAM接枝改性的CF/PEEK.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 postmodification.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.

关 键 词：聚醚醚酮 复合材料 碳纤维 界面改性 

分 类 号：TB332[一般工业技术—材料科学与工程]