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Vpliv izbranih parametrov obdelave lesa z atmosfersko plazmo na proces obdelave in omočljivost lesa
Žigon, Jure (Author), Todorović, Dejan (Author), Pavlič, Matjaž (Author), Petrič, Marko (Author), Dahle, Sebastian (Author)

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Abstract
V prispevku je predstavljena uporaba nizkotemperaturne plazme, ustvarjene v zraku pri atmosferskem tlaku, za obdelavo površin lesa z namenom izboljšanja njihove omočljivosti. Uporabljena je bila naprava s plazemsko razelektritvijo s površinsko oviro, v konfiguraciji s plavajočo elektrodo. Izkazalo se je, da sta gostota in homogenost plazemske razelektritve, ki se je tvorila med izoliranima visoko napetostnima elektrodama in površino lesa smreke (Picea abies (L.) Karst.) in bukve (Fagus sylvatica L.), zelo odvisni od velikosti razmika med elektrodo in lesom. Meritve topografije s konfokalnim laserskim mikroskopom so pokazale, da obdelava lesa s plazmo na njegovi površini povzroči spremembe na submikroskopskem nivoju. Meritve stičnih kotov kapljic vode in premaza na vodni osnovi so pokazale izboljšano dovzetnost za omočitev obdelanih površin. Zaznati je bilo tudi razlike v omočljivosti površin, v odvisnosti od izbranih parametrov pri obdelavi: vrste lesa, podajalne hitrosti obdelovanca, razdalje med elektrodama, razdalje med elektrodama in obdelovancem ter debeline obdelovanca.

Language:Slovenian
Keywords:les, omočljivost, plazma, stični kot, voda
Tipology:1.01 - Original Scientific Article
Organization:BF - Biotechnical Faculty
Year:2020
Number of pages:Str. 71-84
Numbering:Letn. 69, št. 1
UDC:630*829.1:52-726
ISSN on article:0024-1067
DOI:10.26614/les-wood.2020.v69n01a05 This link opens in a new window
COBISS.SI-ID:20476931 This link opens in a new window
Views:142
Downloads:58
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Record is a part of a journal

Title:Les
Shortened title:Les
Publisher:Zveza društev inženirjev in tehnikov gozdarstva in lesarstva Slovenije, Zveza društev inženirjev in tehnikov gozdarstva in lesarstva Slovenije, Biotehniška fakulteta, Oddelek za lesarstvo, Založba Univerze, Biotehniška fakulteta, Oddelek za lesarstvo
ISSN:0024-1067
COBISS.SI-ID:13940224 This link opens in a new window

Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:P4-0015
Name:Les in lignocelulozni kompoziti

Funder:EC - European Commission
Funding Programme:Obzorje 2020
Project no.:št. pogodbe 745936

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:29.04.2021

Secondary language

Language:English
Title:The influence of selected treatment parameters with atmospheric plasma on the treatment process and wood wettability
Abstract:
The paper presents the use of low-temperature plasma, generated in the air at atmospheric pressure, for treatment of wood surfaces to improve their wettability. For this purpose, a dielectric barrier discharge plasma device with a floating electrode configuration was used. The density and homogeneity of the plasma discharge, formed between the isolated high voltage electrodes and the surface of the spruce (Picea abies (L.) Karst.) and beech (Fagus sylvatica L.) wood, was shown to be highly dependent on the size of the gap between the electrode and wood. Topography measurements using a confocal laser microscope showed that exposure of wood to plasma causes changes on its surface at the sub-microscopic level. Measurements of the contact angles of water droplets and water-based coating showed the improved susceptibility to wetting of treated surfaces. Differences in surface wettability were also detected depending on the selected machining parameters: type of wood, workpiece feed speed, the distance between the electrodes, the distance between the electrodes and workpiece, and workpiece thickness.

Keywords:wood, wettability, plasma, contact angle, water

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