Publication details

Surface modification of clay-coated paper by atmospheric-pressure plasma in air

Authors

ŠTĚPÁNOVÁ Vlasta KOVÁČIK Dušan ZEMÁNEK Miroslav STUPAVSKÁ Monika KELAR TUČEKOVÁ Zlata ČERNÁK Mirko

Year of publication 2020
Type Article in Periodical
Magazine / Source Surface and Interface Analysis
MU Faculty or unit

Faculty of Science

Citation
Doi http://dx.doi.org/10.1002/sia.6798
Keywords ageing effect; clay-coated paper; industrial corona; plasma treatment; release liner; surface wettability changes
Description The aim of this work was the wettability improvement of clay-coated paper by ambient air plasma exposure. Industrial corona with a volume dielectric barrier discharge in cylindrical configuration was used as a plasma source; the exposure times varied from 0.25 up to 5 s. Water contact angle (WCA) measurement and surface free energy (SFE) evaluation were carried out for the estimation of wettability changes. Plasma treatment in the duration of 0.25 s was sufficient to decrease the WCA almost to the half of the original value, which was 76 degrees. SFE of paper has increased by 40%-50% after plasma treatment. Long-term ageing effect study of treated samples was carried out up to 3 months after the treatment. WCA did not reach the original value even after 3 months, and it was still 20%-30% lower. O/C ratio increased from 0.7 to 1.8 in case of 5-s plasma treatment, and the new chemical bonds (C=O, O-C=O) were created on the surface.
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