PI填充PTFE复合材料
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摘要
采用金属粉末冶金法制备聚酰亚胺(PI)填充聚四氟乙烯(PTFE)复合材料,考察不同PI填充量对复合材料力学性能和摩擦学性能的影响。结果表明,随着PI填充量的增加,复合材料的拉伸强度和断裂伸长率均下降,但压缩强度提高。采用PI填充PTFE,可以使耐摩擦性能提高2个数量级,摩擦系数稍有提高,磨损表面的扫描电子显微镜显示,PI填充PTFE对提高材料耐磨性能效果非常明显。对采用国产PI与进口PI填充PTFE制备的复合材料性能进行对比,发现国产PI完全可以替代进口同类产品。
Polytetrafluoroethylene(PTFE)/polyimide(PI) composite with different content were prepared by powder metallurgic method,using PTFE as a matrix,PI as a filler. The effects of PI content on the properties of PTFE/PI composite material were investigated. The results show that the tensile strength and elongation of the material decrease with the increase of the PI content. The compressive strength of the material is improved with adding PI content. Compared with pure PTFE,the wear resistance of PTFE/PI composite material improved two orders of magnitude. Wear morphology analysis displayed that the continuity of the transfer film directly affectes the friction and wear behavior of the material. At last,comparing with the properties of the PTFE/PI composites by using domestic PI and imported PI as the filler individually,domestic PI can substitute for the imported PI.
Polytetrafluoroethylene(PTFE)/polyimide(PI) composite with different content were prepared by powder metallurgic method,using PTFE as a matrix,PI as a filler. The effects of PI content on the properties of PTFE/PI composite material were investigated. The results show that the tensile strength and elongation of the material decrease with the increase of the PI content. The compressive strength of the material is improved with adding PI content. Compared with pure PTFE,the wear resistance of PTFE/PI composite material improved two orders of magnitude. Wear morphology analysis displayed that the continuity of the transfer film directly affectes the friction and wear behavior of the material. At last,comparing with the properties of the PTFE/PI composites by using domestic PI and imported PI as the filler individually,domestic PI can substitute for the imported PI.
引文
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[2]袁海根,曾金芳,杨杰.聚四氟乙烯改性研究进展[J].塑料工业,2005,33(8):7-10.Yuan Haigen,Zeng Jinfang,Yang Jie.Progress in research on modification of PTFE[J].China Plastics Industry,2005,33(8):7-10.
[3]谢刚,蔡立芳,黄承亚.聚苯酯填充聚四氟乙烯复合材料力学性能和摩擦学性能的研究[J].材料开发与应用,2007(4):27-29.Xie Gang,Cai Lifang,Huang Chengya.Study on mechanical properties and tribological behavior of ekonol filled PTFE[J].Development and Application of Materials,2007(4):27-29.
[4]赵普,刘近朱,王齐华,等.聚苯酯、聚酰亚胺填充聚四氟乙烯复合材料的摩擦学性能研究[J].材料科学与工程学报,2003,21(6):851-854.Zhao Pu,Liu Jinzhu,Wang Qihua,et al.Study on the tribological properties of ekonol-PI-PTFE Composites[J].Journal of Materials Science&Engineering,2003,21(6):851-854.
[5]陈扶东,龚俊.不同填料填充PTFE复合材料的力学及摩擦磨损性能[J].润滑与密封,2014,39(5):13-16,46.Chen Fudong,Gong Jun.Tribological and mechanical behavior of different fillers filled ptfe composites[J].Lubrication Engineering,2014,39(5):13-16,46.
[6]贾志宁,闫艳红,郝彩哲.PTFE填充PI基复合材料摩擦学性能[J].塑料,2014,43(5):54-57.Jia Zhining,Yan Yanhong,Hao Caizhe.Tribological properties of PI-based composite filled with PTFE[J].Plastics,2014,43(5):54-57.
[7]黄丽,徐定宇,程红原.聚酰亚胺/聚四氟乙烯合金共混工艺的研究[J].高分子材料科学与工程,1999,15(3):81-84.Huang Li,Xu Dingyu,Cheng Hongyuan.Study on blending technology of PI/PTFE alloy[J].Polymer Materials Science&Engineering,1999,15(3):81-84.
[8]杨文娟,马少波,解挺,等.聚酰亚胺对聚四氟乙烯基自润滑复合材料摩擦磨损性能的影响[J].轴承,2009(3):26-29.Yang Wenjuan,Ma Shaobo,Xie Ting,et al.Effect of polyimide on the wear and friction properties of PTFE based self-lubricating composites[J].Bearing,2009(3):26-29.
[9]王锐兰,杨培娟,查道鑫,等.热固性聚酰亚胺/石墨复合材料性能[J].塑料,2013,42(4):90-93.Wang Ruilan,Yang Peijuan,Zha Daoxin,et al.Properties of thermosetting polyimide/graphite compositess[J].Plastics,2013,42(4):90-93.
[10]杨培娟,黄健.汽车止推垫片注塑成型工艺及性能研究[J].工程塑料应用,2015,43(11):44-47.Yang Peijuan,Huang Jian.Study on injection molding technology and properties of thrust washer[J].Engineering Plastics Application,2015,43(11):44-47.
[11]高贵,王宏刚,任俊芳,等.有机填料填充聚四氟乙烯复合材料摩擦学及力学性能[J].润滑与密封,2014,39(6):81-86.Gao Gui,Wang Honggang,Ren Junfang,et al.Mechanics and tribological behavior of organic fillers filled PTFE composites[J].Lubrication Engineering,2014,39(6):81-86.