Surface Properties of Structure-Controlled Silica Films Prepared Using Organic-Inorganic Hybrid Solutions
| Autor: | Ju-Young Kim, John Magak Otieno, Ho Sun Lim, Nahae Kim |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Scanning electron microscope General Chemical Engineering Organic Chemistry Scratch hardness 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Polymer engineering 0104 chemical sciences Contact angle chemistry.chemical_compound chemistry Chemical engineering Trichlorosilane Materials Chemistry Surface modification 0210 nano-technology |
| Zdroj: | Macromolecular Research. 28:15-22 |
| ISSN: | 2092-7673 1598-5032 |
| DOI: | 10.1007/s13233-020-8012-5 |
| Popis: | Silica films with various microstructures were fabricated using organic-inorganic (O-I) hybrid solutions containing a mixture of silica sols, polymethylmethacrylate (PMMA), and urethane acrylate nonionomer (UAN) as an amphiphilic polymer, The O-I hybrid solutions were prepared with various UAN:PMMA and polymer/solvent ratios, then spin-coated on glass and calcinated at 450 °C to produce silica films with various microphase-separated structures. For higher UAN and PMMA concentrations, the silica films showed spherical inorganic domains dispersed over the surface, while many pores were formed in the films with lower polymer contents (observed using scanning electron microscopy). The surface hydrophobicity of the silica films was determined using water contact angle measurements. After surface modification using (1H, 1H, 2H, 2H-perfluorooctyl)trichlorosilane solution, the hydrophobicity of films with a highly microphase-separated structure increased significantly, and all surface-modified films showed increasing hydrophobicity with increasing polymer content. Furthermore, pencil scratch hardness tests showed that the silica films formed on glass substrates could withstand the 5H scratch, test even after surface modification. |
| Databáze: | OpenAIRE |
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