Novel polyimide nanocomposites enhanced by covalent modified graphene nanosheets based on Friedel-Crafts reaction

被引：9
作者：
Min, Chunying [1 ,2 ,3 ,4 ]
Liu, Dengdeng [1 ,2 ]
He, Zengbao [1 ,2 ]
Qian, Jiamin [1 ,2 ]
Song, Haojie [5 ]
Jia, Wei [1 ,2 ]
Zhang, Kan [1 ,2 ]
机构：
[1] Jiangsu Univ, Res Sch Polymer Mat, Zhenjiang 212013, Jiangsu, Peoples R China
[2] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[3] Tsinghua Univ, State Key Lab Tribol, Beijing 100000, Peoples R China
[4] Henan Univ Sci & Technol, Natl United Engn Lab Adv Bearing Tribol, Luoyang 471023, Peoples R China
[5] Shaanxi Univ Sci & Technol, Sch Mat Sci & Engn, Xian 710021, Shaanxi, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE | 2019年 / 54卷 / 07期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
CARBON NANOTUBES; TRIBOLOGICAL PROPERTIES; MECHANICAL-PROPERTIES; RAMAN-SCATTERING; OXIDE; COMPOSITES; SHEETS; FABRICATION; REDUCTION; GRAPHITE;
D O I：
10.1007/s10853-018-03242-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report a new approach to fabricate novel polyimide (PI) nanocomposites using amine-functionalized graphene nanosheets (AGNS). AGNS was successfully prepared by Friedel-Crafts (F-C) reaction and nitroreduction. The PI nanocomposites with outstanding strength and high tribological performance were obtained though in situ polymerization in the presence of different contents of AGNS. The thermal stability, mechanical performance, and the tribological properties of PI/AGNS nanocomposites were significantly enhanced compared with that of pristine PI and PI/graphene nanosheets (GNS) blends, resulting from the strong covalent bonds between AGNS with PI matrix. Particularly, given that the friction coefficient and wear rate were reduced separately by 20.5% and 90.5% under dry sliding condition, the PI/AGNS nanocomposite with 0.5wt% AGNS manifested the optative friction performance. The combined exclusive friction resistance and mechanical performance were the paramount factors which illustrate the applications of the resultant PI/AGNS nanocomposites in the wear-resistant field or another high-performance material.
引用
收藏
页码：5484 / 5497
页数：14
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