Influence of heterogeneous physicochemical processes on the parameters of low-temperature plasma

Smirnov, S. A.; Титов, В. А.; Рыбкин, В. В.

doi:10.1134/s1070363215050436

Cited by 3 publications

(4 citation statements)

References 42 publications

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“…The samples were treated in the positive column of a direct current discharge in oxygen. Using this method allows one to obtain fluxes of oxygen atoms with an energy of 5-10 eV [35]. The discharge was excited in a glass reactor, 3 cm in diameter, at a gas pressure of 0.1 Pa and a discharge current of 120 mA.…”

Section: Atomic Oxygen Treatmentmentioning

confidence: 99%

Synthesis of PI/POSS nanocomposite films based on track nuclear membranes and assessment of their resistance to oxygen plasma flow

Черкашина

Павленко

Носков

et al. 2021

Polymer

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This work presents, for the first time, data on the possibility of synthesizing polyimide nanocomposite films based on track nuclear membranes and organosiloxane (polyhedral oligomeric silsesquioxanes) POSS structures. The synthesis of the nanocomposite films was carried out by filling the tracks of a polyimide membrane with POSS structures under hydrothermal conditions in a high-pressure reactor. The surface and mechanical characteristics of the developed nanocomposite films were studied, and the results of their resistance to the flow of oxygen plasma are presented. It was found that the introduction of POSS structures significantly increased the resistance of polyimide to the flow of oxygen plasma. The PI/POSS composite exhibited an insignificant change in weight, the weight loss reached 0.92 ± 0.05 mg/cm 2 in 24 h after the start of the experiment, which is almost two orders of magnitude lower than that of the polyimide film.

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Section: Atomic Oxygen Treatmentmentioning

confidence: 99%

Synthesis of PI/POSS nanocomposite films based on track nuclear membranes and assessment of their resistance to oxygen plasma flow

Черкашина

Павленко

Носков

et al. 2021

Polymer

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show abstract

“…Неравновесная плазма является эффективным инструментом модифицирования свойств поверхности синтетических и натуральных полимерных материалов [1][2][3][4][5][6]. Поверхностные свойства полимеров изменяются из-за образования в тонком приповерхностном слое новых функциональных групп и радикалов, образующихся под действием активных частиц плазмы [7][8][9][10]. Кроме этого, разрушаются собственные функциональные группы полимеров, что сопровождается выделением газообразных продуктов и убылью массы образца [11][12][13][14].…”

Section: Introductionunclassified

“…Для плазмохимии характерно использование смесей газов, одним из компонентов которых является инертный газ. Это позволяет повысить скорости образования отдельных активных компонентов плазмы [8,9]. Естественно ожидать, что обработка полимеров в плазме инертных газов при пониженном давлении будет сопровождаться эффектами модифицирования и незначительными скоростями травления полимеров [10].…”

Section: Introductionunclassified

“…Это позволяет повысить скорости образования отдельных активных компонентов плазмы [8,9]. Естественно ожидать, что обработка полимеров в плазме инертных газов при пониженном давлении будет сопровождаться эффектами модифицирования и незначительными скоростями травления полимеров [10]. Появление в смеси кислорода должно сильно сказываться на свойствах плазмы и на составе активных частиц.…”

Section: Introductionunclassified

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Kinetic Features of Plasma-Chemical Modification of Polycarbonate in Plasma in Argon - Oxygen Mixture

Shikova¹,

Smirnov²,

Artyuhov³

2020

IVKKT

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This paper presents the results of experimental study of the processes of destruction and changes in the composition of the surface layer of a Lexan 8010 polycarbonate (PC) film during treatment in a positive column of a DC glow discharge in argon, oxygen, and their mixtures. The mass loss rates of the polymer samples were measured depending on the parameters of the discharge and the composition of the plasma-forming gas. The IR spectra of the polymer films after plasma exposure were analyzed. It was shown that the most noticeable changes in the sample destruction rate and the chemical composition of the surface layer occur when the oxygen content in the mixture is up to 20%. With a further increase in the O2 content in the plasma-forming mixture, the changes are insignificant. The main gaseous products of PC destruction in the plasma of an argon-oxygen mixture are H2, CO, and H2O molecules. In the first second after the discharge is turned on, H2 molecules are released at maximum rate and at a lower CO rate. The formation of carbon monoxide and hydrogen molecules occurs without the direct participation of oxygen under the action of active particles of argon plasma without the participation of active oxygen. Exposure to argon plasma leads to an increase in the oxygen content on the sample surface. In this case, the destruction of С – О, О–С(=О)–О bonds, which are part of the structure of the polycarbonate elementary unit, and the formation of new oxygen-containing bonds are observed. Etching of the polymer with active plasma particles leads to a change in the micro relief of the sample surface. A change in roughness and an increase in the concentration of polar functional groups increases the wettability of the PC film surface. A discussion of the possible mechanisms of the processes is made, which allows us to describe the observed results.

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Effect of Conditions for Modification in a High-Frequency Discharge Plasma on the Reversibility of the Surface Properties of Polyethylene Films

Yulenets

Markov

Grachev

2021

Surf. Engin. Appl.Electrochem.

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Influence of heterogeneous physicochemical processes on the parameters of low-temperature plasma

Abstract: The influence of the gaseous products of heterogeneous processes, such as recombination and deactivation of active species on the physical characteristics of plasma and the rates of the processes involving electrons is considered.

Cited by 3 publications

References 42 publications

Synthesis of PI/POSS nanocomposite films based on track nuclear membranes and assessment of their resistance to oxygen plasma flow

Synthesis of PI/POSS nanocomposite films based on track nuclear membranes and assessment of their resistance to oxygen plasma flow

Kinetic Features of Plasma-Chemical Modification of Polycarbonate in Plasma in Argon - Oxygen Mixture

Effect of Conditions for Modification in a High-Frequency Discharge Plasma on the Reversibility of the Surface Properties of Polyethylene Films

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