Abstract
Paper presents the results of experimental studies aimed to multilayer graphene obtaining. Thermoexpanded graphite was used as a raw material. The technological regulations consisted of two main stages: obtaining a water-graphite suspension by cavitation method and grinding graphite globules on graphene plates using ultrasound or electrohydraulic impact according to Yutkin's method. As a result of the experiment, a few layers of graphene were obtained, which is a pack of 10–20 graphene plates in each. CFD modeling of the cavitation process was performed. The analysis showed that the chosen geometry of the impeller blades, its speed, angle of attack provides the necessary effect—cavitation and the necessary mixing throughout the volume.
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Acknowledgements
Some results of this study were obtained under the support of the National Academy of Sciences of Ukraine (Fundamental research program of NASU “Fundamental problems of nanostructured systems, nanomaterials, nanotechnology”). Research was financed by budget program 6541230 of the National Academy of Sciences of Ukraine “Supporting the development of priority areas of research”. Also this research was supported by funding from a Nation China Natural Science, No. 81660508 and grants from the Guangxi Science and Technology Plan Project, Guike AB16380153, Guike AB17195076.
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SE and KA developed the basics of a two-stage method to obtain a few layers graphene, data processing, and preparation and approval of the final manuscript. GN contributed to the statement of the problem and the way to solve it. SE made CFD modeling. All authors read and approved the final manuscript.
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Strativnov, E., Khovavko, A. & Guachao, N. Obtaining of globular graphene based on thermally expanded graphite. Appl Nanosci 12, 2791–2811 (2022). https://doi.org/10.1007/s13204-022-02589-1
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DOI: https://doi.org/10.1007/s13204-022-02589-1