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Title:Influence of microwave heating in wood preservation on traditional surface coatings
Authors:Klinc, Martin (Author)
Pavlič, Matjaž (Author)
Petrič, Marko (Author)
Pohleven, Franc (Author)
Language:English
Tipology:1.01 - Original Scientific Article
Organisation:Logo SciVie - Slovenian Forestry Institute
Abstract:Microwaves are very effective at wood pest eradication. However, elevated temperatures may pose a risk of damaging surface coatings used on cultural and historical artefacts. Therefore, we monitored changes in patterns of the original paint taken from such objects along with newly prepared coatings. We evaluated visual, mechanical, and chemical modifications of coatings when exposed to microwaves (750W, 2.4GHz), at 60°C or 80°C for 10 min. Whether old or new, only water-based coatings have proven to be resistant to elevated temperatures and no damage was observed at 80°C. Blisters have formed on layers of new oil paints and natural resins due to insufficiently cured film. Temperatures above 80°C may cause melting of coniferous wood resin and thus transport of resin to the surface; on the other hand, temperatures up to 60°C are completely harmless. Mechanical and chemical changes of coatings exposed to microwaves were not observed, but the studies showed that colour and gloss exhibited minor changes.
Keywords:wood, wood coatings, wood protection, microwaves, heating
Year of publishing:2017
COBISS_ID:4829350 Link is opened in a new window
UDC:630*84(045)=111
ISSN on article:2335-3112
OceCobissID:266761216 Link is opened in a new window
DOI:10.20315/ASetL.112.3 Link is opened in a new window
Views:3577
Downloads:1863
Files:.pdf PDF - Presentation file, download (2,63 MB)
URL URL - Source URL, visit https://doi.org/10.20315/ASetL.112.3
 
Journal:Acta Silvae et Ligni
Gozdarski inštitut Slovenije, založba Silvae Slovenica
 
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Licences

License:CC BY-NC-ND 2.5 SI, Creative Commons Attribution Non-Commercial No Derivatives 2.5
Link:https://creativecommons.org/licenses/by-nc-nd/2.5/si/deed.en
Description:You are free to reproduce and redistribute the material in any medium or format. You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. If you remix, transform, or build upon the material, you may not distribute the modified material. You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
Licensing start date:03.07.2017

Secondary language

Language:English
Title:Vpliv mikrovalovnega segrevanja pri zaščiti lesa na tradicionalne površinske premaze
Abstract:Mikrovalovi so zelo učinkoviti pri zatiranju lesnih škodljivcev. Lahko pa povišane temperature pomenijo tveganje za nastanek poškodb površinskih premazov, uporabljenih na kulturnozgodovinskih predmetih. Zato smo spremembe spremljali na vzorcih originalnih premazov, odvzetih s kulturnozgodovinskih predmetov, ter na novo pripravljenih premazih. Ocenili smo vizualne, mehanske in kemične spremembe premazov, izpostavljenih mikrovalovom (750W, 2,4 GHz) pri 60 °C ali 80 °C za 10 min. Stari premazi in novi, a le tisti na vodni osnovi, so se izkazali odpornejši proti povišanim temperaturam in poškodb pri 80 °C nismo opazili. Poškodbe v obliki mehurjenja so nastajale pri slojih nove oljne barve in naravnih smol, kot posledica premalo utrjenega filma. Temperatura nad 80 °C lahko povzroči taljenje smole v lesu iglavcev in tako prodiranje na površino vzorca pod premaz, medtem ko so temperature do 60 °C povsem neškodljive. Mehanskih in kemičnih sprememb premazov, izpostavljenih mikrovalovom, raziskave niso pokazale, sta pa se minimalno spremenila barva in sijaj.
Keywords:kulturnozgodovinski predmeti, les, premazi, zaščita lesa, mikrovalovi, segrevanje, historical artefacts, cultural artefacts


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