Hydrophobic photocatalytic composite coatings based on nano-TiO2 hydrosol and aminopropyl terminated polydimethylsiloxane prepared by a facile approach
| Autor: | Huaimin Guan, Chang Lu, Pan Shiming, Xiaohong Ding, Yuejin Tong, Xiaowei Yu |
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| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Materials science Polydimethylsiloxane Mechanical Engineering Composite number HYDROSOL 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Contact angle chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials Superhydrophilicity Photocatalysis General Materials Science Fourier transform infrared spectroscopy 0210 nano-technology |
| Zdroj: | Materials Letters. 228:5-8 |
| ISSN: | 0167-577X |
| Popis: | A facile approach was adopted to fabricate hydrophobic photocatalytic composite coatings from nano-TiO2 hydrosol and aminopropyl terminated polydimethylsiloxane (NH2-PDMS). A strong interaction bewteen nano-TiO2 and polymers was verified by FTIR and XPS. The photocatalytic activity of the composite coatings was about the same as that of superhydrophilic photocatalytic coating according to the degradation activity of methylene blue (MB). The composite coatings were hydrophobic with water contact angles (WCA) around 120°, which remained stable over 318 h against UV irradiation. The discoloration of contaminated MB on coatings was performed under outdoor exposure indicating quicker color bleaching of MB on composite coatings than that on the controls. The advantages of combining hydrophobic and photocatalytic properties would offer a potential solution as self-cleaning surfaces in various applications. |
| Databáze: | OpenAIRE |
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