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Surface properties of beech wood modified by CO2 laser
Názov Surface properties of beech wood modified by CO2 laser Aut.údaje Jozef Kúdela ... [et al.] Autor Kúdela Jozef TUZDFNOD - Katedra náuky o dreve Spoluautori Reinprecht Ladislav TUZDFDT - Katedra drevárskych technológií Tiralová Zuzana TUZDFDT - Katedra drevárskych technológií Andrejko Michal TUZDFNOD - Katedra náuky o dreve Zdroj.dok. Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. Vol. 61, no. 1 (2019), s. 5-18. - Zvolen : Technická univerzita vo Zvolene, 2019 Poznámky Lit. Jazyk dok. angličtina Krajina Slovenská republika Systematika 674.031.632.2 630*81 Heslá bukové drevo - beech wood * CO2 lasery - carbon dioxide lasers * povrchové vlastnosti - surface properties * farba dreva - colour of wood * drsnosť - roughness * vlnitá štruktúra - wavy structure * zmáčanie - wetting Anotácia The paper is focusedon the analysis of surface properties of beech wood modified by the CO2 laser. Colour and morphological changes inthe beech wood surface subjected to laser treatment under different irradiation doseswere monitored. Experiments were carried out toinvestigatethe wetting surfaces treated with standard liquids. Free surface energy values were also determined for these surfaces. The results showed that increasing the irradiation dose over a range of 0-75 J∙cm-² induced a significant increase in the total colour difference (DE*= 45).This discolouration was caused by a significant decrease in brightness L* from 73 to 30 and also by the decreased colour coordinates a*a b*. Significant morphological changes were not detected except at the highest irradiation dosewith the entire surface layer being carbonised and the surface roughness increased.Anincreasein irradiation dosesresulted in a decrease inthe surface free energy values of beech wood. However, the wood surface modified this waystill complied with the requirements for surface treatment with coating materials and for gluing. URL https://df.tuzvo.sk/sites/default/files/01-01-19.pdf Kategória publikačnej činnosti ADN Báza dát xcla - ČLÁNKY Druh dok. RBX - rozpis článkov z periodík Odkazy PERIODIKÁ-Súborný záznam periodika Zväzky 2019: 1-2 
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