Features of modeling the plasma synthesis of ONС in a liquid medium

The development of carbon nanostructured (CNS) materials for industrial applications is an urgent task, given their widespread use in various industries. The main purpose of the study was to consider the features of the method of plasma synthesis of CNS in a liquid medium and the approach to determining the rational parameters of the technological process. The materials obtained by the electric arc method in a liquid medium and the synthesis unit itself are considered. Significant differences between the synthesis of CNS in a liquid medium and the use of a traditional gas buffer medium are shown. The methods of mathematical modeling are indicated, which make it possible to describe plasma processes in relation to the synthesis under consideration. The expediency of using a kinetic approach for modeling plasma processes of synthesis of CNS in a liquid medium is shown. The use of a system of Boltzmann equations for each type of plasma component of the interelectrode space, supplemented by the condition of paired elastic and inelastic collisions, allows us to consider the processes of motion and interaction of particles. This makes it possible to predict the formation in plasma of cluster groups with C‒C, C=C bonds forming pentagons and hexagons, which form the architecture of the CNS and determine the quantitative yield of the synthesis product. Supplementing the model with a system of Maxwell's equations allows us to describe the parameters of the electromagnetic field, and using the Fourier thermal conductivity equation, taking into account the moving boundaries of the system, to calculate the temperature field of the object and find the initial velocities and energies of particles. The proposed approach of mathematical modeling of plasma synthesis makes it possible to find rational technological conditions for the synthesis of CNS in a liquid medium, which determine the production of the final product with specified properties and maximum yield.