| LIU Gao-shang,LIU Ya-xuan,BIAN Da,ZHAO Yong-wu.Tribological Properties of Graphene Oxide Grafted Carbon Fiber and Its Resin Coating under Different Loads[J],50(4):62-69 |
| Tribological Properties of Graphene Oxide Grafted Carbon Fiber and Its Resin Coating under Different Loads |
| Received:October 12, 2020 Revised:March 05, 2021 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2021.04.005 |
| KeyWord:graphene oxide carbon fiber grafting thermal stability friction factor wear rate |
| Author | Institution |
| LIU Gao-shang |
School of Mechanical Engineering, Jiangnan University, Wuxi , China |
| LIU Ya-xuan |
School of Mechanical Engineering, Jiangnan University, Wuxi , China |
| BIAN Da |
School of Mechanical Engineering, Jiangnan University, Wuxi , China |
| ZHAO Yong-wu |
School of Mechanical Engineering, Jiangnan University, Wuxi , China |
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| Abstract: |
| To improve the interfacial properties of carbon fiber (CF) in the water-based polyamideimide (PAI) resin coating to obtain the PAI composite coating with excellent tribological properties. Silane (KH550) was used as the coupling agent to prepare graphene oxide (GO) chemically grafted CF reinforcement (CF&GO). The thermal stability before and after CF grafting and the tribological behavior and wear mechanism of PAI composite coating with CF&GO under different loads were studied. The infrared spectrometer (FTIR), X-ray diffractometer (XRD) and scanning electron microscope (SEM) was used to characterize the functional groups, composition and surface morphology of the sample; thermal weight loss instrument (TGA) was used to characterize the thermal stability of CF before and after grafting SEM, friction and wear tester and white light interferometer were used to characterize the distribution and tribological properties of CF&GO in the PAI composite coating. GO was successfully grafted by forming an amide bond with the silane-modified CF. After the grafting, the CF formed a multi-scale reinforcement and the surface morphology was rough; in addition, the thermal stability of the grafted CF was reduced, and the thermal stability law was GO<CF&GO<CF. The tribological properties of the PAI composite coating with CF&GO under the load of 10 N, 15 N and 20 N showed different phenomena:when the load was 10 N, the friction factor was the highest 0.212, and the lowest wear rate was 2.64×106 μm3/(N.m); when the load was 20 N, the friction factor was the lowest 0.168, and the highest wear rate was 3.74×106 μm3/(N.m). After grafting, the fiber surface roughness and interface properties were improved, and the thermal stability was reduced. With the increase of the load, the CF&GO reinforced PAI composite coating indicated that the friction factor decreases under different loads, and the wear rate increases. |
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