Preparation of small CNTs@Fe 3 O 4 and alignment in carbon fabrics/epoxy composites to improve mechanical and tribologic
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Preparation of small CNTs@Fe3O4 and alignment in carbon fabrics/epoxy composites to improve mechanical and tribological properties Zhe Tong1,2, Hailin Lu3, Feifei Guo2,3, Wenxing Lei4, Mochen Dong5, and Guangneng Dong1,2,*
1
School of Mechanical Engineering, Institute of Design Science and Basic Components, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, People’s Republic of China 2 Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China 3 School of Mechanical and Electric Engineering, Xi’an Polytechnic University, Xi’an 710049, People’s Republic of China 4 Research Institute of Shan-xi Jiang-yang Chemical LTD., Taiyuan 030041, Shanxi, People’s Republic of China 5 School of Science, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, People’s Republic of China
Received: 29 December 2019
ABSTRACT
Accepted: 29 May 2020
The CNTs@Fe3O4 hybrids were synthesized via a modified co-precipitation method and aligned along the through-thickness of carbon fabrics-reinforced epoxy composites (CFRPCs) by applying a weak magnetic field. The effects of the length, orientation and concentration of CNTs@Fe3O4 on the mechanical and tribological properties of CFRPCs were investigated. The results showed that the modified co-precipitation method decreased the size of Fe3O4 nanoparticles (approximately 10 nm in diameter), promoting the dispersion of CNTs@Fe3O4 in epoxy resin. The alignment of CNTs@Fe3O4 hybrids significantly increased the interlaminar shear strength (ILSS) and hardness of CFRPCs. The long CNTs@Fe3O4 can more effectively improve the ILSS of CFRPCs compared to short CNTs@Fe3O4. Besides, the addition of aligned CNTs@Fe3O4 hybrids significant improves the tribological properties of CFRPCs. Compared to long CNTs@Fe3O4-reinforced CFRPCs, the short CNTs@Fe3O4-reinforced CFRPCs show the best tribological properties. The properties anisotropy of CNTs@Fe3O4 and high CNTs@Fe3O4 concentration in near surface of CFRPCs are the main reason for the improvement in tribological properties of CFRPCs.
Published online: 14 October 2020
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
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https://doi.org/10.1007/s10853-020-04885-z
J Mater Sci (2021) 56:1386–1400
Introduction Fabrics-reinforced polymer composites (FRPCs) are widely used in many industrial areas such as naval and aerospace for its high specific strength, chemical resistance, high thermal conductivity and electrical conductivity [1–3]. Despite possessing many excellent performances, resin-based composites typically show a poor tribological properties and a low interlayer performance, leading to low resistance to wear and delamination. The unsatisfactory tribological properties and interlayer performance of FRPCs present a challenges for key seal and bearings [4–6]. Hence, it is very necessary and urgent to increase the tribological properties and interlayer performan
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