Sol–gel hybrid films based on organosilanes with long alkyl chains
| Autor: | Violeta Purcar, Mihai Stoica, Simona Caprarescu, Valentin Rădiţoiu, Monica Florentina Raduly, Alina Rădiţoiu, Raluca Manea, Adriana Nicoleta Frone, Raluca Somoghi, Mihai Anastasescu, Elvira Alexandrescu, Luminiţa Eugenia Wagner, Georgiana Cornelia Ispas |
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| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Materials science technology industry and agriculture 02 engineering and technology Surfaces and Interfaces General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Silane 0104 chemical sciences Surfaces Coatings and Films Contact angle chemistry.chemical_compound Colloid and Surface Chemistry Chemical engineering chemistry lipids (amino acids peptides and proteins) Wetting Thin film Fourier transform infrared spectroscopy 0210 nano-technology Alkyl Sol-gel |
| Zdroj: | Journal of Coatings Technology and Research. 17:1389-1399 |
| ISSN: | 1935-3804 1547-0091 |
| DOI: | 10.1007/s11998-020-00359-8 |
| Popis: | In this paper, we report the synthesis of different silica materials via the acid-catalyzed sol–gel process at room temperature (25°C), using silane precursors with various alkyl chains (dimethyl, octyl and/or hexadecyl), in order to obtain thin films with anti-reflective and hydrophobic properties. Chemical, optical and structural properties of obtained silica materials were thoroughly characterized with various techniques such as FTIR and UV–Vis spectroscopy, AFM analysis, ellipsometric measurements, ESEM and TEM microscopy. Wettability of thin films was evaluated by water contact angle measurements. FTIR spectra of silica materials revealed that the intensity of the Si–O–Si characteristic bands varies depending on the precursor type. From AFM results, we found that the obtained films present a different microstructure as a function of the silica sol formulations. The hydrophobic character of the thin films increases with increasing the length of the hydrophobic chains following the order: dimethyl |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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