Multidimensional structure and enhancement performance of modified graphene/carbon nanotube assemblies in tribological properties of polyimide nanocomposites

被引：13

作者：

Xin, Yuanshi ^{[1
]}

Li, Tongsheng ^{[1
]}

Xu, Fanglin ^{[1
]}

Wang, Mingming ^{[1
]}

机构：

[1] Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China

来源：

RSC ADVANCES | 2017年 / 7卷 / 34期

关键词：

WALLED CARBON NANOTUBES; MECHANICAL-PROPERTIES; EPOXY COMPOSITES; ELECTRICAL-CONDUCTIVITY; POLYMER NANOCOMPOSITES; RAMAN-SPECTROSCOPY; MATRIX COMPOSITES; HYBRID FILLERS; FILMS; WEAR;

D O I：

10.1039/c7ra02149f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Modified graphene/carbon nanotube (abbreviated GCNT) assemblies were prepared by chemical compounding from amino-functionalized graphene (abbreviated MG) and carboxyl-functionalized multi-walled carbon nanotube (abbreviated MCNT). Diverse hybrid structures, such as graphene-shelled CNT microspheres, graphene/CNT interlayers and CNT-coated graphene nanosheets, have been obtained by adjusting the reaction ratio of the two precursor particles. The as-prepared GCNTs were incorporated into polyimide (PI) matrix to yield GCNT/PI composites by in situ polymerization. The mechanical, thermo-mechanical and tribological properties of GCNT/PI composites were investigated and synergistic effects in terms of lubrication and wear resistance have been acquired. The friction coefficient and wear rate decreased by 29.3% and 75.8%, respectively, with only 0.5 wt% addition of GCNT14 (W-MG/W-MCNT = 1 : 4), compared to virgin PI. The results indicate that combinational structure of multidimensional assemblies has a great influence on the enhancement performance and tribological mechanism of nanocomposites.

引用

页码：20742 / 20753

页数：12

共 55 条

[21] Improvement in Mechanical Properties and Electromagnetic Interference Shielding Effectiveness of PVA-Based Composites: Synergistic Effect Between Graphene Nano-Sheets and Multi-Walled Carbon Nanotubes [J].