The Effect of Different Coupling Agents on Nano-ZnO Materials Obtained via the Sol–Gel Process
| Autor: | H. Stroescu, Violeta Purcar, Ludmila Otilia Cinteza, Augusta Raluca Gabor, Elvira Alexandrescu, Simona Caprarescu, Raluca Somoghi, Cristian Andi Nicolae, Ioana Cătălina Gîfu, Sabina Georgiana Niţu, Raluca Ianchis |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Thermogravimetric analysis
Materials science sol–gel process ZnO nanoparticles coupling agent surface modifications hybrid coating General Chemical Engineering 02 engineering and technology 010402 general chemistry 01 natural sciences Article Contact angle lcsh:Chemistry chemistry.chemical_compound Dynamic light scattering General Materials Science Thermal stability Fourier transform infrared spectroscopy Environmental scanning electron microscope Sol-gel 021001 nanoscience & nanotechnology Silane 0104 chemical sciences chemistry Chemical engineering lcsh:QD1-999 0210 nano-technology |
| Zdroj: | Nanomaterials, Vol 7, Iss 12, p 439 (2017) Nanomaterials; Volume 7; Issue 12; Pages: 439 Nanomaterials |
| ISSN: | 2079-4991 |
| Popis: | Hybrid nanomaterials based on zinc oxide were synthesized via the sol-gel method, using different silane coupling agents: (3-glycidyloxypropyl)trimethoxysilane (GPTMS), phenyltriethoxysilane (PhTES), octyltriethoxysilane (OTES), and octadecyltriethoxysilane (ODTES). Morphological properties and the silane precursor type effect on the particle size were investigated using dynamic light scattering (DLS), environmental scanning electron microscopy (ESEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), and X-ray diffraction (XRD). The bonding characteristics of modified ZnO materials were investigated using Fourier transform infrared spectroscopy (FTIR). The final solutions were deposited on metallic substrate (aluminum) in order to realize coatings with various wettability and roughness. The morphological studies, obtained by ESEM and TEM analysis, showed that the sizes of the ZnO nanoparticles are changed as function of silane precursor used in synthesis. The thermal stability of modified ZnO materials showed that the degradation of the alkyl groups takes place in the 300-500 °C range. Water wettability study revealed a contact angle of 142 ± 5° for the surface covered with ZnO material modified with ODTES and showed that the water contact angle increases as the alkyl chain from the silica precursor increases. These modified ZnO materials, therefore, can be easily incorporated in coatings for various applications such as anti-corrosion and anti-icing. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|