The Impact of a CO<sub>2</sub> Laser on the Adhesion and Mold Resistance of a Synthetic Polymer Layer on a Wood Surface
In the wood industry, laser technologies are commonly applied for the sawing, engraving, or perforation of solid wood and wood composites, but less knowledge exists about their effect on the joining and painting of wood materials with synthetic polymer adhesives and coatings. In this work, a CO<s...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Forests |
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| Online Access: | https://www.mdpi.com/1999-4907/12/2/242 |
| _version_ | 1797395942831292416 |
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| author | Ladislav Reinprecht Zuzana Vidholdová |
| author_facet | Ladislav Reinprecht Zuzana Vidholdová |
| author_sort | Ladislav Reinprecht |
| collection | DOAJ |
| description | In the wood industry, laser technologies are commonly applied for the sawing, engraving, or perforation of solid wood and wood composites, but less knowledge exists about their effect on the joining and painting of wood materials with synthetic polymer adhesives and coatings. In this work, a CO<sub>2</sub> laser with irradiation doses from 2.1 to 18.8 J·cm<sup>−2</sup> was used for the modification of European beech (<i>Fagus sylvatica</i> L.) and Norway spruce (<i>Picea abies</i> /L./ Karst) wood surfaces—either in the native state or after covering them with a layer of polyvinyl acetate (PVAc) or polyurethane (PUR) polymer. The adhesion strength of the phase interface “synthetic polymer—wood”, evaluated by the standard EN ISO 4624, decreased significantly and proportionately in all the laser modification modes, with higher irradiation doses leading to a more apparent degradation and carbonization of the wood adherent or the synthetic polymer layer. The mold resistance of the polymers, evaluated by the standard EN 15457, increased significantly for the less mold-resistant PVAc polymer after its irradiation on the wood adherent. However, the more mold-resistant PUR polymer was able to better resist the microscopic fungi <i>Aspergillus niger</i> Tiegh. and <i>Penicillium purpurogenum</i> Stoll. when irradiation doses of higher intensity acted firstly on the wood adherent. |
| first_indexed | 2024-03-09T00:42:31Z |
| format | Article |
| id | doaj.art-c73f0cc8a44d47daa86d942cde263f1c |
| institution | Directory Open Access Journal |
| issn | 1999-4907 |
| language | English |
| last_indexed | 2024-03-09T00:42:31Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Forests |
| spelling | doaj.art-c73f0cc8a44d47daa86d942cde263f1c2023-12-11T17:44:35ZengMDPI AGForests1999-49072021-02-0112224210.3390/f12020242The Impact of a CO<sub>2</sub> Laser on the Adhesion and Mold Resistance of a Synthetic Polymer Layer on a Wood SurfaceLadislav Reinprecht0Zuzana Vidholdová1Department of Wood Technology, Faculty of Wood Sciences and Technology, Technical University in Zvolen, T. G. Masaryka 24, SK-960 01 Zvolen, SlovakiaDepartment of Wood Technology, Faculty of Wood Sciences and Technology, Technical University in Zvolen, T. G. Masaryka 24, SK-960 01 Zvolen, SlovakiaIn the wood industry, laser technologies are commonly applied for the sawing, engraving, or perforation of solid wood and wood composites, but less knowledge exists about their effect on the joining and painting of wood materials with synthetic polymer adhesives and coatings. In this work, a CO<sub>2</sub> laser with irradiation doses from 2.1 to 18.8 J·cm<sup>−2</sup> was used for the modification of European beech (<i>Fagus sylvatica</i> L.) and Norway spruce (<i>Picea abies</i> /L./ Karst) wood surfaces—either in the native state or after covering them with a layer of polyvinyl acetate (PVAc) or polyurethane (PUR) polymer. The adhesion strength of the phase interface “synthetic polymer—wood”, evaluated by the standard EN ISO 4624, decreased significantly and proportionately in all the laser modification modes, with higher irradiation doses leading to a more apparent degradation and carbonization of the wood adherent or the synthetic polymer layer. The mold resistance of the polymers, evaluated by the standard EN 15457, increased significantly for the less mold-resistant PVAc polymer after its irradiation on the wood adherent. However, the more mold-resistant PUR polymer was able to better resist the microscopic fungi <i>Aspergillus niger</i> Tiegh. and <i>Penicillium purpurogenum</i> Stoll. when irradiation doses of higher intensity acted firstly on the wood adherent.https://www.mdpi.com/1999-4907/12/2/242woodpolyvinyl acetatepolyurethanelaserdamagemicroscopy |
| spellingShingle | Ladislav Reinprecht Zuzana Vidholdová The Impact of a CO<sub>2</sub> Laser on the Adhesion and Mold Resistance of a Synthetic Polymer Layer on a Wood Surface Forests wood polyvinyl acetate polyurethane laser damage microscopy |
| title | The Impact of a CO<sub>2</sub> Laser on the Adhesion and Mold Resistance of a Synthetic Polymer Layer on a Wood Surface |
| title_full | The Impact of a CO<sub>2</sub> Laser on the Adhesion and Mold Resistance of a Synthetic Polymer Layer on a Wood Surface |
| title_fullStr | The Impact of a CO<sub>2</sub> Laser on the Adhesion and Mold Resistance of a Synthetic Polymer Layer on a Wood Surface |
| title_full_unstemmed | The Impact of a CO<sub>2</sub> Laser on the Adhesion and Mold Resistance of a Synthetic Polymer Layer on a Wood Surface |
| title_short | The Impact of a CO<sub>2</sub> Laser on the Adhesion and Mold Resistance of a Synthetic Polymer Layer on a Wood Surface |
| title_sort | impact of a co sub 2 sub laser on the adhesion and mold resistance of a synthetic polymer layer on a wood surface |
| topic | wood polyvinyl acetate polyurethane laser damage microscopy |
| url | https://www.mdpi.com/1999-4907/12/2/242 |
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