Silica Sol-gel Coatings with Improved Light Transmittance and Stability
| Autor: | M. Kabai-Faix, András Szalai, Emőke Albert, Csaba Major, Peter Basa, Zoltán Hórvölgyi, Lenke Kócs, Borbála Tegze |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
business.industry General Chemical Engineering 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Sol gel coating 01 natural sciences 0104 chemical sciences Optics Transmittance Composite material 0210 nano-technology Porosity business Sol-gel |
| Zdroj: | Periodica Polytechnica Chemical Engineering. |
| ISSN: | 1587-3765 0324-5853 |
| DOI: | 10.3311/ppch.10550 |
| Popis: | Silica sol-gel coatings on different substrate materials and their use as model systems have been studied. Mesoporous silica coatings with thicknesses of 85 - 135 nm and porosity of 18 ˗ 37% were prepared by dip-coating on polycarbonate and glass substrates. In order to eliminate the shrinkage of the porous structure acid or base vapour treatment was applied. Thickness and refractive index of the coatings were determined by analysing the transmittance spectra of the samples. Ellipsometric porosimetry measurements were carried out to determine the porosity, pore radius distribution, thickness and refractive index. The thickness of the samples was further confirmed by scanning electron microscopy. The adsorption capacity of the porous coatings was also studied by dye impregnation tests. The temporal stability of the samples was investigated by UV-Vis spectrometry and it was found that the advantageous optical properties (Tmax = 98 – 99%) of the samples remained constant even after a 1 year storage period. |
| Databáze: | OpenAIRE |
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