Investigation of Wettability, Drying and Water Condensation on Polyimide (Kapton) Films Treated by Atmospheric Pressure Air Dielectric Barrier Discharge
In this study, we report on the investigation of influence of air atmospheric pressure dielectric barrier discharge on polyimide (Kapton) films. It is shown that plasma treatment causes a significant increase of Kapton wettability that is connected with alterations of its chemical composition (oxida...
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doaj-f7807786f94e40069fc8b19d5f7668ce2020-11-25T03:55:07ZengMDPI AGCoatings2079-64122020-06-011061961910.3390/coatings10070619Investigation of Wettability, Drying and Water Condensation on Polyimide (Kapton) Films Treated by Atmospheric Pressure Air Dielectric Barrier DischargeNatalia Khomiakova0Jan Hanuš1Anna Kuzminova2Ondřej Kylián3Department of Macromolecular Physics, Faculty of Mathematics and Physics, Charles University, V Holešovickách 2, 18000 Praha 8, Czech RepublicDepartment of Macromolecular Physics, Faculty of Mathematics and Physics, Charles University, V Holešovickách 2, 18000 Praha 8, Czech RepublicDepartment of Macromolecular Physics, Faculty of Mathematics and Physics, Charles University, V Holešovickách 2, 18000 Praha 8, Czech RepublicDepartment of Macromolecular Physics, Faculty of Mathematics and Physics, Charles University, V Holešovickách 2, 18000 Praha 8, Czech RepublicIn this study, we report on the investigation of influence of air atmospheric pressure dielectric barrier discharge on polyimide (Kapton) films. It is shown that plasma treatment causes a significant increase of Kapton wettability that is connected with alterations of its chemical composition (oxidation) induced by dielectric barrier discharge. Observed variations in the wettability of Kapton were also found to be accompanied by changes in the dynamics of water droplets drying on plasma-treated Kapton, namely by the reduction of the constant contact angle phase of the droplet drying. This effect may be ascribed to the higher surface heterogeneity of plasma-treated Kapton that causes pinning of the edges of drying droplet on the Kapton surface. Finally, the differences in wettability induced by the plasma treatment led to a different way, how the water condensates on the Kapton surface: while the condensing water forms large amount of small droplets on untreated Kapton, much bigger water structures were found on the Kapton exposed to atmospheric plasma.https://www.mdpi.com/2079-6412/10/7/619Kaptondielectric barrier dischargesurface modification |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Natalia Khomiakova Jan Hanuš Anna Kuzminova Ondřej Kylián |
spellingShingle |
Natalia Khomiakova Jan Hanuš Anna Kuzminova Ondřej Kylián Investigation of Wettability, Drying and Water Condensation on Polyimide (Kapton) Films Treated by Atmospheric Pressure Air Dielectric Barrier Discharge Coatings Kapton dielectric barrier discharge surface modification |
author_facet |
Natalia Khomiakova Jan Hanuš Anna Kuzminova Ondřej Kylián |
author_sort |
Natalia Khomiakova |
title |
Investigation of Wettability, Drying and Water Condensation on Polyimide (Kapton) Films Treated by Atmospheric Pressure Air Dielectric Barrier Discharge |
title_short |
Investigation of Wettability, Drying and Water Condensation on Polyimide (Kapton) Films Treated by Atmospheric Pressure Air Dielectric Barrier Discharge |
title_full |
Investigation of Wettability, Drying and Water Condensation on Polyimide (Kapton) Films Treated by Atmospheric Pressure Air Dielectric Barrier Discharge |
title_fullStr |
Investigation of Wettability, Drying and Water Condensation on Polyimide (Kapton) Films Treated by Atmospheric Pressure Air Dielectric Barrier Discharge |
title_full_unstemmed |
Investigation of Wettability, Drying and Water Condensation on Polyimide (Kapton) Films Treated by Atmospheric Pressure Air Dielectric Barrier Discharge |
title_sort |
investigation of wettability, drying and water condensation on polyimide (kapton) films treated by atmospheric pressure air dielectric barrier discharge |
publisher |
MDPI AG |
series |
Coatings |
issn |
2079-6412 |
publishDate |
2020-06-01 |
description |
In this study, we report on the investigation of influence of air atmospheric pressure dielectric barrier discharge on polyimide (Kapton) films. It is shown that plasma treatment causes a significant increase of Kapton wettability that is connected with alterations of its chemical composition (oxidation) induced by dielectric barrier discharge. Observed variations in the wettability of Kapton were also found to be accompanied by changes in the dynamics of water droplets drying on plasma-treated Kapton, namely by the reduction of the constant contact angle phase of the droplet drying. This effect may be ascribed to the higher surface heterogeneity of plasma-treated Kapton that causes pinning of the edges of drying droplet on the Kapton surface. Finally, the differences in wettability induced by the plasma treatment led to a different way, how the water condensates on the Kapton surface: while the condensing water forms large amount of small droplets on untreated Kapton, much bigger water structures were found on the Kapton exposed to atmospheric plasma. |
topic |
Kapton dielectric barrier discharge surface modification |
url |
https://www.mdpi.com/2079-6412/10/7/619 |
work_keys_str_mv |
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