Surface modification of polyamide by 50 Hz dielectric barrier discharge (DBD) produced in air at atmospheric pressure

  • Rajesh Prakash Guragain Department of Physics, School of Science, Kathmandu University, Dhulikhel https://orcid.org/0000-0001-9220-5772
  • Hom Bahadur Baniya Department of Physics, School of Science, Kathmandu University, Dhulikhel
  • Santosh Dhungana Department of Physics, School of Science, Kathmandu University, Dhulikhel
  • Bishnu Prasad Pandey Department of Chemical Science and Engineering, Kathmandu University, Dhulikhel
  • Ujjwal Man Joshi Department of Physics, School of Science, Kathmandu University, Dhulikhel
  • Deepak Prasad Subedi Department of Physics, School of Science, Kathmandu University, Dhulikhel https://orcid.org/0000-0001-6790-5961
Keywords: Contact Angle, Surface Free Energy, Hydrophilicity, Wettability, Electrical Characterization, Optical Characterization

Abstract

Industrial applications of the dielectric barrier discharge (DBD) have a long tradition. However, lack of understanding in some of its fundamental issues, such as stochastic behaviors, is still a challenge for DBD researchers. The work was carried out at line frequency, 15 kV, and at atmospheric pressure. This work focuses on the study of the electrical and optical characteristics of DBD at atmospheric pressure to determine a suitable condition for utilization of the device for surface modification of polyamides (PA) (Nylon 6/6). In this work, films were treated by dielectric barrier discharge and the effects on the morphology and chemistry of the material were studied. Surface characteristics were examined via contact angle measurements and SEM. The wettability tests revealed the improvement of the hydrophilic character of the surface of polyamide films as the water contact angle measured after the plasma treatments significantly decreased. The corresponding changes of the total surface energy revealed a significant increase in its polar component. The improvement of the wettability of PA strongly depends on the treatment time. The outcomes of the experiments proved that the modification of surface properties via plasma treatment reach its saturation point after a certain treatment time thus reducing the necessity of further treatment.

BIBECHANA 18 (1) (2021) 19-25

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Author Biography

Deepak Prasad Subedi, Department of Physics, School of Science, Kathmandu University, Dhulikhel

Deepak Prasad SubediĀ  is a professor at the Department of Physics, School of Science, Kathmandu University.

Published
2021-01-01
How to Cite
Guragain, R., Baniya, H., Dhungana, S., Pandey, B., Joshi, U., & Subedi, D. (2021). Surface modification of polyamide by 50 Hz dielectric barrier discharge (DBD) produced in air at atmospheric pressure. BIBECHANA, 18(1), 19-25. https://doi.org/10.3126/bibechana.v18i1.27650
Section
Research Article