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32 results on '"Voznesensky, E. F."'

3. Simulation of the processes of plasma modification and vacuum metallization of polymer materials by the method of molecular dynamics

Author

Timoshina Y. A., Voznesensky E. F., Karnoukhov A. E., Zheltukhin V. S., and Teptina A. I.

Subjects
Environmental sciences, GE1-350
Abstract

The article presents the results of the development of molecular dynamics models of modifications of polypropylene (PP) material in the plasma of a radio-frequency (RF) discharge and a copper coating deposit by magnetron sputtering on the surface of a polyethylene (PE) material. The model of the RF plasma modification process describes changes in the surface layers of the PP material upon interaction with low-energy plasma ions: the nature of the breaking of covalent bonds in macromolecules, the chemical composition of sputtered particles, and changes in the ordering of the supramolecular structure. The model of the vacuum metallization process describes the processes of the introduction of metal atoms into the polymer structure, the change in the conformation of macromolecules, the formation of macroradicals with uncompensated chemical bonds, and the formation of an interfacial layer between the polymer and the metal coating.

Published
2023
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5. Plasmachemical Modification of Polymeric Materials.

Author

Timoshina, Y. A., Voznesensky, E. F., Teptina, A. I., and Zhelonkin, Y. O.

Subjects
*DOUBLE bonds, *AMINO group, *SURFACES (Technology), *ATOMS, *POLYETHYLENE
Abstract

The purpose of this work is to investigate the effect of radio-frequency (RF) plasma modification in a plasma-forming reactive air gas on changes in the chemical structure of polyethylene (PE) based materials. As a result of plasma modification, the relative content of carbon and oxygen atoms linked by a double bond, as well as carbon and nitrogen atoms linked by a single bond, significantly increases on the surface of PE materials, which is evidence of the formation of carbonyl, carboxyl, aldehyde, and amino groups. [ABSTRACT FROM AUTHOR]

Published
2023
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6. Model of the Interaction of Reactive Gases with Polymer Materials in Low-Pressure Radio-Frequency Plasma.

Author

Timoshina, Y. A., Voznesensky, E. F., Teptina, A. I., and Zhelonkin, Y. O.

Subjects
*REACTIVE polymers, *HYDROGEN peroxide, *MOLECULAR dynamics, *CHEMICAL reactions, *HYDROPEROXIDES, *PLASMA flow
Abstract

The aim of this work is to scientifically substantiate the mechanisms of plasma-chemical modification of polymeric materials in radio-frequency (RF) low-pressure discharge plasma. Using the method of molecular dynamics, a model describing the mechanisms of formation of oxygen- and nitrogen-containing functional groups on the surface of polymeric materials as a result of plasma modification was developed. The established mechanisms include multistep chemical reactions with the formation of alkyl dioxyl and alkoxyl radicals and unstable hydroperoxide groups. [ABSTRACT FROM AUTHOR]

Published
2023
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22. TWO-STEP MODIFICATION OF TEXTILE MATERIALS WITH MEMBRANE COATING

Author

Vishnevskaya, O. V., Voznesensky, E. F., Ibragimov, R. G., Vishnevsky, V. V., Gavrilov, M. D., and Kharapudko, Yu. V.

Abstract

The possibility of using a two-stage plasma modification for improving the hygienic properties of textile materials with a membrane coating in order to improve steam, air permeability and water resistance was studied.

Published
2018

24. RESEARCH OF HYGIENIC PROPERTIES OF POROUS POLYETHYLENE FILMS WITH CaCO3

Author

Gavrilov, M. D., Vishnevskaya, O. V., Kharapudko, Y. V., Karnoukhov, A. E., Samigullina, K. R., Kashapova, A. R., and Voznesensky, E. F.

Abstract

The complex of hygienic properties of polymeric polyethylene (PE) films with mineral filler СаСО3 is experimentally investigated.

Published
2018

25. RESEARCH OF THE INFLUENCE OF HIGH-FREQUENCY PLASMA TREATMENT ON THE ABSORPTION TIME OF WATER IN BASALT TISSUE

Author

Karimullin, I. I., Voznesensky, E. F., Garifullin, A. R., and Karnoukhov, A. E.

Abstract

The influence of different high-frequency plasma modes on the absorption time of water in basalt tissue has been investigated. It has been established that, depending on the parameters of high-frequency plasma treatment, it is possible to achieve both hydrophobicity and increased hydrophilicity of basaltic tissues.

Published
2018

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