Functionalization of multi-wall carbon nanotubes to reduce the coefficient of the friction and improve the wear resistance of multi-wall carbon nanotube/epoxy composites |
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| Affiliation: | 1. Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China;2. Key Laboratory of In-Fiber Intregrated Optics, Ministry of Education, and College of Science, Harbin Engineering University, Harbin 150001, PR China;3. Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, United States;1. Department of Mechanical Engineering, ESTSetúbal, Instituto Politécnico de Setúbal, Campus IPS, Estefanilha, 2914-761 Setúbal, Portugal;2. IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal;3. Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal;4. CeFEMA, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1, 1049-001 Lisboa, Portugal;1. Faculty of Materials & Manufacturing Processes, Malek-e-Ashtar University of Technology, Tehran, Iran;2. Faculty of Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran;1. Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China;2. College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China |
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| Abstract: | Functionalization of multi-wall carbon nanotubes (MWCNTs) was achieved by grafting carboxyl groups and amino groups. Fourier transform infrared spectroscopy was used to detect the changes produced by functional groups on the surface of the MWCNTs. Three different MWCNTs were incorporated into epoxy resin and the friction and wear behavior of MWCNT/epoxy composites was investigated using a M-2000 wear testing machine at different sliding speeds under different applied loads. Scanning electron microscopy was used to observe the worn surfaces of the samples. The results indicated that the functional groups had been grafted on the surface of MWCNTs. Compared with neat epoxy, the composites with MWCNTs showed a lower friction coefficient and wear rate, and the wear rate decreased with the increase of MWCNT loading. Combining epoxy resin with MWCNTs is an efficient method to improve the wear resistance and decrease the coefficient of friction. |
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