Weathering performance of surface of thermally modified wood finished with nanoparticles-modified waterborne polyacrylate coatings
| Autor: | Hrvoje Turkulin, Vlatka Jirouš-Rajković, Josip Miklečić |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Substrate surface General Physics and Astronomy Nanoparticle Weathering 02 engineering and technology Surfaces and Interfaces General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Gloss (optics) Durability 0104 chemical sciences Surfaces Coatings and Films Cracking Coating Zno nanoparticles engineering nano-sized UV absorbers thermally modified wood titanium dioxide (TiO2) waterborne coating weathering zinc oxide (ZnO) Composite material 0210 nano-technology |
| Zdroj: | Applied Surface Science. 408:103-109 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2017.03.011 |
| Popis: | In this research the samples of thermally modified (TMT) beech wood samples, finished with waterborne polyacrylate clear coatings modified with nano-sized ZnO and TiO2-rutil were naturally and artificially exposed to weathering conditions. To extend the lifetime of wood and maintain its natural look, the research and development of clear coatings with minimal use of harmful chemicals has become very important. Therefore nano-sized inorganic UV absorbers are increasingly used to enhance the durability of the coating and wood substrate, still retaining the transparency of the coating. During exposure the visual inspection was performed, further the changes of colour, gloss and adhesion were recorded. Interaction of the film with the thermally modified substrate surface were studied. Results showed that the addition of TiO2-rutil and ZnO nanoparticles to the waterborne polyacrylate coating improved the colour stability of thermally modified beech-wood. However, nano-sized ZnO increased the cracking and peeling, and caused the loss in adhesion strength of the film on thermally modified beech wood. |
| Databáze: | OpenAIRE |
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