Catecholated graphene-filled polyimide with enhanced mechanical, thermal, and tribological properties. (February 2021)

• Record Type: Journal Article
• Authors: Wu, Xing; Jin, Zhengyu; Zhu, Yuejin; Zhao, Haichao
• Is Part Of: High performance polymers. Volume 33:Number 1(2021)
• Page Start: 40
• Page End: 51
• Publication Date: 2021-02
• Subjects: Catechol -- graphene -- polyimide -- friction; Polymerization -- Periodicals; Polymers -- Periodicals; 547.7
• DOI: 10.1177/0954008320940358
• Languages: English
• ISSNs: 0954-0083

Abstract

In order to achieve good dispersion of graphene in polyimide (PI), catecholated graphene (G-Cat) was prepared by 1, 3-dipolar cycloaddition reaction of N -methylglycine and 3, 4-dihydroxybenzaldehyde with graphene sheets. G-Cat/PI composites were prepared by in situ polymerization with pyromellitic dianhydride and 4, 4-oxydianiline in the presence of G-Cat. The successful modification of graphene was proved by infrared spectroscopy, Raman spectroscopy, and transmission electron microscopy. The comprehensive properties of G-Cat/PI composites were studied by tensile, dynamic mechanical analysis, thermogravimetric analysis, and friction and wear tests. By observing the morphology of wear marks, the friction and wear properties of the composites were emphatically analyzed. Therefore, graphene/PI composites were expected to have broad application prospects in lubrication and wear resistance.