Tailoring polyimide composites with low friction and wear at high temperatures

被引：8
作者：
Duan, Chunjian [1 ,2 ]
Gao, Chuanping [1 ,2 ]
Li, Song [2 ]
Yang, Rui [2 ]
Yang, Zenghui [2 ]
Zhang, Yaoming [2 ]
Tao, Liming [2 ]
Zhang, Xinrui [2 ]
Wang, Qihua [2 ]
Wang, Tingmei [2 ]
机构：
[1] Henan Univ, Natl & Local Joint Engn Res Ctr Appl Technol Hybr, Kaifeng, Peoples R China
[2] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2022年 / 139卷 / 09期
基金：
中国国家自然科学基金;
关键词：
composites; crosslinking; friction; polyimides; thermosets; wear and lubrication; ENHANCING TRIBOLOGICAL PERFORMANCE; MATRIX COMPOSITES; SOLID LUBRICANTS; FIBER; GRAPHENE; NANOCOMPOSITES; BEHAVIORS; MECHANISMS; RESISTANCE; HYBRID;
D O I：
10.1002/app.51736
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
In this article, thermosetting polyimide (TPI) composites based on two ideal ingredients (graphite/graphene-like carbon nitride, g-C3N4) were designed with different fibers and their tribological performance was comprehensively investigated at different high temperatures. It was found that the synergistic effect between solid lubricants graphite blended with g-C3N4 and reinforced fibers on friction and wear performance. Extremely lower friction and wear behavior of TPI composite is attained with aramid pulps (APs) at high temperatures. More importantly, an obvious transition of wear rate and friction took place with aramid pulps under 200 degrees C. When the cross-sections of the transfer films were analyzed using focused ion beam transmission electron microscopy (FIB-TEM) and X-ray photoelectron spectroscopy (XPS), it was found that graphite and g-C3N4 combined with APs led to simultaneous improvement in load-carrying capability of TPI matrix and durability of tribofilms subjected to complex physical and chemical reaction. Our work discloses a route for developing the TPI composite exposed to high temperatures with extremely lower friction and wear rate.
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页数：11
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