Plasma treatment of spruce wood changes its dielectric properties

Obdelava smrekovega lesa s plazmo spremeni njegove dielektrične lastnosti

Authors

  • Sebastian Dahle
  • Jure Žigon
  • Marko Petrič
  • Mirko Kariž

DOI:

https://doi.org/10.26614/les-wood.2020.v69n02a03

Keywords:

wood, Norway spruce = Picea abies, plasma, dielectric constant, moisture content

Abstract

The effects of dielectric barrier discharge (DBD) plasma treatment on the dielectric properties of Norway spruce wood (Picea abies (L.) Karst.) were investigated using dielectric analysis. Dielectric constant (i.e. permittivity) and loss coefficient were determined at various frequencies. The resulting changes on lamellae specimens of different thicknesses were compared with the change in mass and moisture content. A significant influence of the plasma was found, leading to an increase of the dielectric constant by about 2%, and a decrease of sample mass directly after the plasma treatment by approx. 14%, whereas a reduction in moisture content by only about 0.6% and a corresponding change in loss coefficient were detected. Overall, the mechanisms of the observed changes remain unclear and seem mainly uncorrelated with the hitherto known chemical changes in wood surfaces caused by similar plasma discharges.

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Published

30.12.2020

Issue

Section

Articles

How to Cite

Dahle, S., Žigon, J., Petrič, M., & Kariž, M. (2020). Plasma treatment of spruce wood changes its dielectric properties: Obdelava smrekovega lesa s plazmo spremeni njegove dielektrične lastnosti. Les/Wood, 69(2), 83-95. https://doi.org/10.26614/les-wood.2020.v69n02a03

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