A Simple, Long-Lasting Treatment for Concrete by Combining Hydrophobic Performance with a Photoinduced Superhydrophilic Surface for Easy Removal of Oil Pollutants
| العنوان: | A Simple, Long-Lasting Treatment for Concrete by Combining Hydrophobic Performance with a Photoinduced Superhydrophilic Surface for Easy Removal of Oil Pollutants |
|---|---|
| المؤلفون: | Luis A. M. Carrascosa, Maria J. Mosquera, Rafael Zarzuela, Nabil Badreldin |
| المصدر: | ACS Applied Materials & Interfaces. 12:19974-19987 |
| بيانات النشر: | American Chemical Society (ACS), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | 021110 strategic, defence & security studies, Materials science, Polydimethylsiloxane, 0211 other engineering and technologies, 02 engineering and technology, Adhesion, Substrate (printing), engineering.material, 021001 nanoscience & nanotechnology, Durability, chemistry.chemical_compound, Coating, Chemical engineering, chemistry, 13. Climate action, Superhydrophilicity, engineering, General Materials Science, 0210 nano-technology, Porosity, Hydrophobic silica |
| الوصف: | Superhydrophobic surfaces present promising applications in the protection of building materials, such as the self-cleaning effect promoted by their high water-repellent properties. However, these surfaces easily lose their properties when exposed to oil contaminants. This is a critical weak point for their application in building facades, which are exposed to environmental pollutants such as hydrocarbons and vandalism (e.g., grafitti). A viable strategy to remove oils is to produce superhydrophilic surfaces, which present underwater superoleophobic behavior. In the case of buildings, the use of this strategy can be considered counterproductive because it promotes their interaction with water, the main vehicle of most decay agents. In this work, we have successfully combined the advantages of a superhydrophilic coating with a hydrophobic impregnation treatment, which prevents water ingress into the porous structure of the substrate. Specifically, a photoinduced superhydrophilic surface was produced on concrete by simple spraying of a starting sol containing TiO2NPs, which create a Cassie-Baxter state, a silica oligomer, producing a compatible matrix promoting good adhesion to the substrate and polydimethylsiloxane as a hydrophobic agent. After being exposed to sunlight, the treated surfaces switched from superhydrophobic (SCA 160°) to superhydrophilic (SCA 85% reduction). The treatment showed suitable adhesion to the substrate and good resistance to rainfall and outdoor exposure due to the presence of the hydrophobic silica matrix in the concrete pore structure. |
| تدمد: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.0c03576 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::366385040541266b0bc45b31fdf61a83 https://doi.org/10.1021/acsami.0c03576 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....366385040541266b0bc45b31fdf61a83 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19448252 19448244 |
|---|---|
| DOI: | 10.1021/acsami.0c03576 |