Preparation and Characterization of Some Sol-Gel Modified Silica Coatings Deposited on Polyvinyl Chloride (PVC) Substrates
| Autor: | Raluca Augusta Gabor, H. Stroescu, Alina Rădițoiu, Mihai Anastasescu, Georgiana Cornelia Ispas, Simona Caprarescu, Violeta Purcar, Cristian Andi Nicolae, Valentin Rădițoiu, Florentina Monica Raduly, Raluca Manea, Adriana Nicoleta Frone |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Thermogravimetric analysis
Materials science Infrared spectroscopy 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Contact angle chemistry.chemical_compound Coating Materials Chemistry Fourier transform infrared spectroscopy Sol-gel hydrophobic surface transparency technology industry and agriculture silica coatings Surfaces and Interfaces 021001 nanoscience & nanotechnology 0104 chemical sciences Surfaces Coatings and Films sol-gel materials Polyvinyl chloride Chemical engineering chemistry PVC substrate lcsh:TA1-2040 engineering Wetting lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology |
| Zdroj: | Coatings Volume 11 Issue 1 Coatings, Vol 11, Iss 11, p 11 (2021) |
| ISSN: | 2079-6412 |
| DOI: | 10.3390/coatings11010011 |
| Popis: | Transparent and antireflective coatings were prepared by deposition of modified silica materials onto polyvinyl chloride (PVC) substrates. These materials were obtained by the sol-gel route in acidic medium, at room temperature (25 ° C), using different alkoxysilanes with various functional groups (methyl, vinyl, octyl or hexadecyl). Physicochemical and microstructural properties of resulted silica materials and of thin coatings were investigated through Fourier Transforms Infrared Spectroscopy (FTIR), UV-Vis spectroscopy, Thermal Gravimetric Analysis (TGA), Dynamic Mechanical Analysis (DMA), Atomic Force Microscopy (AFM) and ellipsometric measurements. Wetting behaviors of the silica coatings were evaluated by measurement of static contact angle against water. FTIR spectra of materials confirmed the high degree of cross-linking that result from the formation of the inorganic backbone through the hydrolysis and polycondensation reactions together with the formation of the organic network. These sol-gel silica coatings showed a reduction in the reflectance (10%) compared with uncoated PVC substrate. AFM reveals that the films are uniform, and adherent to the substrate, but their morphology is strongly influenced by the chemical composition of the coating matrices. These silica coatings can be useful for potential electronic and optical devices. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|