Recoating performance of fresh and weathered wood surfaces through atmospheric dielectric barrier discharge plasma activation

Žigon, Jure (avtor), Pavlič, Matjaž (avtor), Kovač, Janez (avtor), Straže, Aleš (avtor)

This study investigated the effectiveness of non-thermal atmospheric dielectric barrier discharge (DBD) plasma activation on the recoating performance of fresh and weathered spruce wood surfaces, examining both uncoated and coated samples exposed to natural weathering. Results showed that film-forming coatings effectively preserved the wood’s aesthetic appearance, despite slight darkening after recoating. Plasma treatment induced significant chemical changes, creating oxygen-containing functional groups that improved surface activation and wettability. The highest hydrophilicity occurred on uncoated, plasma-treated surfaces, where water droplets disappeared within 60 seconds. Plasma also reduced the initial contact angle of water droplets on surfaces coated with waterborne and solventborne film-forming coatings and Tung oil, enhancing their performance. Weathering increased surface roughness, especially in uncoated samples and those with Tung oil, while solventborne and waterborne coatings offered better resistance to photodegradation. Microscopic analysis of recoated samples confirmed that film-forming coatings protected the wood from discoloration and cracking, although weathering weakened their adhesion. Tung oil recoating provided better long-term hydrophobicity for fresh surfaces, unaffected by plasma pre-treatment. Overall, atmospheric plasma activation was found to be an effective, sustainable pretreatment method that enhanced recoating performance, particularly for film-forming coatings, and extended the durability of coated wood products exposed to environmental conditions.

• Jezik: Angleški jezik
• Ključne besede: re-use, coating, timber, finishing, surface activation
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: BF - Biotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2026
• Št. strani: Str. 1148–1163
• Številčenje: Vol. 21, no. 2
• PID: 20.500.12556/RUL-181945
• UDK: 630*8
• ISSN pri članku: 1748-0280
• DOI: 10.1080/17480272.2025.2470381
• COBISS.SI-ID: 227929091
• Datum objave v RUL: 20.04.2026

Gradivo je del revije

• Naslov: Wood material science & engineering
• Skrajšan naslov: Wood mater. sci. eng
• Založnik: Taylor & Francis
• ISSN: 1748-0280
• COBISS.SI-ID: 522172953

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: ponovna uporaba, premaz, les, površinska obdelava, aktivacija površin