The Adverse Effects of TiO<sub>2</sub> Photocatalycity on Paraloid B72 Hybrid Stone Relics Protective Coating Aging Behaviors under UV Irradiation
The incorporation of photocatalytic nanomaterials into polymer coatings is used to protect stone relics from weathering. However, the photocatalytic nanomaterials might generate excess free radicals to degrade the polymer matrix. In this work, a certain amount of TiO<sub>2</sub> nanopart...
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| Format: | Article |
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MDPI AG
2021-01-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/2/262 |
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| author | Wenjuan Li Junling Lin Yaru Zhao Zihe Pan |
| author_facet | Wenjuan Li Junling Lin Yaru Zhao Zihe Pan |
| author_sort | Wenjuan Li |
| collection | DOAJ |
| description | The incorporation of photocatalytic nanomaterials into polymer coatings is used to protect stone relics from weathering. However, the photocatalytic nanomaterials might generate excess free radicals to degrade the polymer matrix. In this work, a certain amount of TiO<sub>2</sub> nanoparticles were dispersed into Paraloid B72 and applied onto sandstone relics to explore the adverse effects of TiO<sub>2</sub> nanoparticles on Paraloid B72 under ultraviolet (UV) irradiation. To fulfill this goal, the effects of TiO<sub>2</sub> on pore formation and the structure of Paraloid B72 was studied by scanning electron microscopy (SEM). Moreover, the surface chemical composition, pore structure, surface roughness and surface wettability were explored via Fourier transform infrared (FTIR) spectroscopy, SEM, optical profilometer and water contact angle measurement under UV irradiation. Results showed that the incorporation of TiO<sub>2</sub> nanoparticles prohibited the generation of pores in Paraloid B72 and there were no pores formed when the content of TiO<sub>2</sub> exceeded 0.8 wt%. The water contact angle of origin Paraloid B72 and TiO<sub>2</sub>/Paraloid B72 decreased with the prolonging UV irradiation. Moreover, TiO<sub>2</sub> nanoparticles were extracted from the matrix and the pores cannot be detected with the prolonging UV irradiation time under a higher content of TiO<sub>2</sub>. These research findings might promote the understanding of using photocatalytic nanomaterials in developing stone relics’ protective coating. |
| first_indexed | 2024-03-09T04:47:28Z |
| format | Article |
| id | doaj.art-fd7561997c564e6db46a37636eda6771 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T04:47:28Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-fd7561997c564e6db46a37636eda67712023-12-03T13:14:13ZengMDPI AGPolymers2073-43602021-01-0113226210.3390/polym13020262The Adverse Effects of TiO<sub>2</sub> Photocatalycity on Paraloid B72 Hybrid Stone Relics Protective Coating Aging Behaviors under UV IrradiationWenjuan Li0Junling Lin1Yaru Zhao2Zihe Pan3College of Art, Taiyuan University of Technology, 209 University Avenue, Jinzhong 030600, ChinaCollege of Art, Taiyuan University of Technology, 209 University Avenue, Jinzhong 030600, ChinaCollege of Art, Taiyuan University of Technology, 209 University Avenue, Jinzhong 030600, ChinaInstitute of Resources and Environmental Engineering, Shanxi University, 92 Wucheng Road, Taiyuan 030006, ChinaThe incorporation of photocatalytic nanomaterials into polymer coatings is used to protect stone relics from weathering. However, the photocatalytic nanomaterials might generate excess free radicals to degrade the polymer matrix. In this work, a certain amount of TiO<sub>2</sub> nanoparticles were dispersed into Paraloid B72 and applied onto sandstone relics to explore the adverse effects of TiO<sub>2</sub> nanoparticles on Paraloid B72 under ultraviolet (UV) irradiation. To fulfill this goal, the effects of TiO<sub>2</sub> on pore formation and the structure of Paraloid B72 was studied by scanning electron microscopy (SEM). Moreover, the surface chemical composition, pore structure, surface roughness and surface wettability were explored via Fourier transform infrared (FTIR) spectroscopy, SEM, optical profilometer and water contact angle measurement under UV irradiation. Results showed that the incorporation of TiO<sub>2</sub> nanoparticles prohibited the generation of pores in Paraloid B72 and there were no pores formed when the content of TiO<sub>2</sub> exceeded 0.8 wt%. The water contact angle of origin Paraloid B72 and TiO<sub>2</sub>/Paraloid B72 decreased with the prolonging UV irradiation. Moreover, TiO<sub>2</sub> nanoparticles were extracted from the matrix and the pores cannot be detected with the prolonging UV irradiation time under a higher content of TiO<sub>2</sub>. These research findings might promote the understanding of using photocatalytic nanomaterials in developing stone relics’ protective coating.https://www.mdpi.com/2073-4360/13/2/262hybrid protect coatingTiO<sub>2</sub>aging |
| spellingShingle | Wenjuan Li Junling Lin Yaru Zhao Zihe Pan The Adverse Effects of TiO<sub>2</sub> Photocatalycity on Paraloid B72 Hybrid Stone Relics Protective Coating Aging Behaviors under UV Irradiation Polymers hybrid protect coating TiO<sub>2</sub> aging |
| title | The Adverse Effects of TiO<sub>2</sub> Photocatalycity on Paraloid B72 Hybrid Stone Relics Protective Coating Aging Behaviors under UV Irradiation |
| title_full | The Adverse Effects of TiO<sub>2</sub> Photocatalycity on Paraloid B72 Hybrid Stone Relics Protective Coating Aging Behaviors under UV Irradiation |
| title_fullStr | The Adverse Effects of TiO<sub>2</sub> Photocatalycity on Paraloid B72 Hybrid Stone Relics Protective Coating Aging Behaviors under UV Irradiation |
| title_full_unstemmed | The Adverse Effects of TiO<sub>2</sub> Photocatalycity on Paraloid B72 Hybrid Stone Relics Protective Coating Aging Behaviors under UV Irradiation |
| title_short | The Adverse Effects of TiO<sub>2</sub> Photocatalycity on Paraloid B72 Hybrid Stone Relics Protective Coating Aging Behaviors under UV Irradiation |
| title_sort | adverse effects of tio sub 2 sub photocatalycity on paraloid b72 hybrid stone relics protective coating aging behaviors under uv irradiation |
| topic | hybrid protect coating TiO<sub>2</sub> aging |
| url | https://www.mdpi.com/2073-4360/13/2/262 |
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