Environmentally Friendly UV-Protective Polyacrylate/TiO<sub>2</sub> Nanocoatings
The development of coatings that maintain the attractive natural appearance of wood while providing ultraviolet (UV) protection is extremely important for the widespread use of wood products. In this study, the influence of different types (powder form and aqueous dispersions) of TiO<sub>2<...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-08-01
|
| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/13/16/2609 |
| _version_ | 1797522269989240832 |
|---|---|
| author | Martina Zeljko Vesna Ocelić Bulatović Vedrana Špada Sanja Lučić Blagojević |
| author_facet | Martina Zeljko Vesna Ocelić Bulatović Vedrana Špada Sanja Lučić Blagojević |
| author_sort | Martina Zeljko |
| collection | DOAJ |
| description | The development of coatings that maintain the attractive natural appearance of wood while providing ultraviolet (UV) protection is extremely important for the widespread use of wood products. In this study, the influence of different types (powder form and aqueous dispersions) of TiO<sub>2</sub> in an amount of 1.0 wt% by monomer weight on the properties of environmentally friendly polyacrylate (PA)/TiO<sub>2</sub> emulsions prepared by ex situ and in situ polymerization, as well as on the UV-protective properties of the coating films, was investigated. The results showed that the addition of TiO<sub>2</sub> significantly affected the particle size distribution of PA and the viscosity of PA varied according to the preparation method. Compared with the ex situ preparation method, in situ polymerization provides better dispersibility of TiO<sub>2</sub> nanoparticles in PA coating film, as well as a better UV protection effect and greater transparency of the coating films. Better morphology and transparency of nanocoating films were achieved by adding TiO<sub>2</sub> nanofillers in aqueous dispersion as compared to the addition of TiO<sub>2</sub> in powder form. An increase in the glass transition temperature during UV exposure associated with cross-linking in the polymer was less pronounced in the in situ-prepared coating films, confirming better UV protection, while the photocatalytic effect of TiO<sub>2</sub> was more pronounced in the ex situ-prepared coating films. The results indicate that the method of preparation has a significant influence on the properties of the coating films. |
| first_indexed | 2024-03-10T08:27:01Z |
| format | Article |
| id | doaj.art-14fe519e0b1c4a5d9e9cfe7177adba1c |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T08:27:01Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-14fe519e0b1c4a5d9e9cfe7177adba1c2023-11-22T09:21:37ZengMDPI AGPolymers2073-43602021-08-011316260910.3390/polym13162609Environmentally Friendly UV-Protective Polyacrylate/TiO<sub>2</sub> NanocoatingsMartina Zeljko0Vesna Ocelić Bulatović1Vedrana Špada2Sanja Lučić Blagojević3Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, CroatiaFaculty of Metallurgy, University of Zagreb, 44000 Sisak, CroatiaMETRIS Materials Research Centre of Region of Istria, 52100 Pula, CroatiaFaculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, CroatiaThe development of coatings that maintain the attractive natural appearance of wood while providing ultraviolet (UV) protection is extremely important for the widespread use of wood products. In this study, the influence of different types (powder form and aqueous dispersions) of TiO<sub>2</sub> in an amount of 1.0 wt% by monomer weight on the properties of environmentally friendly polyacrylate (PA)/TiO<sub>2</sub> emulsions prepared by ex situ and in situ polymerization, as well as on the UV-protective properties of the coating films, was investigated. The results showed that the addition of TiO<sub>2</sub> significantly affected the particle size distribution of PA and the viscosity of PA varied according to the preparation method. Compared with the ex situ preparation method, in situ polymerization provides better dispersibility of TiO<sub>2</sub> nanoparticles in PA coating film, as well as a better UV protection effect and greater transparency of the coating films. Better morphology and transparency of nanocoating films were achieved by adding TiO<sub>2</sub> nanofillers in aqueous dispersion as compared to the addition of TiO<sub>2</sub> in powder form. An increase in the glass transition temperature during UV exposure associated with cross-linking in the polymer was less pronounced in the in situ-prepared coating films, confirming better UV protection, while the photocatalytic effect of TiO<sub>2</sub> was more pronounced in the ex situ-prepared coating films. The results indicate that the method of preparation has a significant influence on the properties of the coating films.https://www.mdpi.com/2073-4360/13/16/2609wood nanocoatingsUV protectionpolyacrylaterutile TiO<sub>2</sub> |
| spellingShingle | Martina Zeljko Vesna Ocelić Bulatović Vedrana Špada Sanja Lučić Blagojević Environmentally Friendly UV-Protective Polyacrylate/TiO<sub>2</sub> Nanocoatings Polymers wood nanocoatings UV protection polyacrylate rutile TiO<sub>2</sub> |
| title | Environmentally Friendly UV-Protective Polyacrylate/TiO<sub>2</sub> Nanocoatings |
| title_full | Environmentally Friendly UV-Protective Polyacrylate/TiO<sub>2</sub> Nanocoatings |
| title_fullStr | Environmentally Friendly UV-Protective Polyacrylate/TiO<sub>2</sub> Nanocoatings |
| title_full_unstemmed | Environmentally Friendly UV-Protective Polyacrylate/TiO<sub>2</sub> Nanocoatings |
| title_short | Environmentally Friendly UV-Protective Polyacrylate/TiO<sub>2</sub> Nanocoatings |
| title_sort | environmentally friendly uv protective polyacrylate tio sub 2 sub nanocoatings |
| topic | wood nanocoatings UV protection polyacrylate rutile TiO<sub>2</sub> |
| url | https://www.mdpi.com/2073-4360/13/16/2609 |
| work_keys_str_mv | AT martinazeljko environmentallyfriendlyuvprotectivepolyacrylatetiosub2subnanocoatings AT vesnaocelicbulatovic environmentallyfriendlyuvprotectivepolyacrylatetiosub2subnanocoatings AT vedranaspada environmentallyfriendlyuvprotectivepolyacrylatetiosub2subnanocoatings AT sanjalucicblagojevic environmentallyfriendlyuvprotectivepolyacrylatetiosub2subnanocoatings |