| POLYMERS AND POLYMER MATRIX COMPOSITES |
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| Effect of Graphene with Different Layers and Sizes on Thermal Properties of Lubricating Oil |
| CAI Zhongpan, TIAN Maocheng, ZHANG Guanmin
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| School of Energy and Power Engineering, Shandong University, Jinan 250061,China |
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Abstract The unique advantages of graphene in structure and performance give it an irreplaceable role in modern science and technology. Many phy-sical and chemical properties of graphene are very sensitive to the number of layers and structure size of graphene. In this study, three kinds of typical graphene nanoparticles were selected, which were very few layers graphene (1#), few layers graphene (2#) and multilayer graphene (3#), the nanofluids with different mass fraction were prepared by adding them to the existing lubricating oil. The thermal conductivity, specific heat capacity and viscosity were measured. The results show that the graphene nanofluid prepared by the two-step method had good stability, and it had good dispersion and no agglomeration by high-speed centrifuge test. At the same temperature and the same mass fraction of graphene particles, the nanofluids prepared by 1# graphene had the best thermophysical properties. Compared with the base liquid, the thermal conductivity can increase by 143.63%, and the specific heat capacity can increase by 23.58%. The thermal properties of nanofluids by 2# graphene were the second, while the thermal properties of nanofluids by 3# graphene were the worst.
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Published:
Online: 2022-02-10
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| Fund:National Natural Science Foundation of China (51676114). |
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