The Influence of New Hydrophobic Silica Nanoparticles on the Surface Properties of the Films Obtained from Bilayer Hybrids
| Autor: | Sabina Georgiana Niţu, Catalin-Ilie Spataru, Bogdan Trica, Raluca Somoghi, Cristian Petcu, Violeta Purcar, Elvira Alexandrescu, Denis Mihaela Panaitescu, Maria-Luiza Jecu, Dan Donescu |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
General Chemical Engineering Nanoparticle 02 engineering and technology engineering.material silica nanoparticles 010402 general chemistry organic–inorganic hybrids 01 natural sciences sol–gel process Article lcsh:Chemistry Coating nanostructuration Organic chemistry General Materials Science Thermal stability Fourier transform infrared spectroscopy Alkyl Hydrophobic silica chemistry.chemical_classification Bilayer trialkylmonoalkoxysilanes 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering lcsh:QD1-999 engineering Surface modification 0210 nano-technology |
| Zdroj: | Nanomaterials Nanomaterials, Vol 7, Iss 2, p 47 (2017) Nanomaterials; Volume 7; Issue 2; Pages: 47 |
| ISSN: | 2079-4991 |
| Popis: | Ultra-hydrophobic bilayer coatings on a glass surface were fabricated by sol–gel process using hexadecyltrimethoxysilane (C16TMS) and tetramethoxysilane (TMOS) (1:4 molar ratio) as precursors. After coating, silica nanoparticles (SiO2 NPs) functionalized with different mono-alkoxy derivatives (methoxytrimethylsilane, TMeMS; ethoxydimethylvinylsilane, DMeVES; ethoxydimethylphenylsilane, DMePhES; and methoxydimethyloctylsilane, DMeC8MS) were added, assuring the microscale roughness on the glass surface. Influences of the functionalized SiO2 NPs and surface morphology on the hydrophobicity of the hybrid films were discussed. The successful functionalization of SiO2 NPs with hydrophobic alkyl groups were confirmed by Fourier transform infrared spectroscopy (FTIR). The thermal stability of hydrophobic SiO2 NPs showed that the degradation of the alkyl groups takes place in the 200–400 °C range. Bilayer coating with C16TMS/TMOS and SiO2 NPs modified with alkoxysilane substituted with C8 alkyl chain (SiO2 NP-C8) has micro/nano structure. Hydrophobicity of functionalized SiO2 NPs-C8 and its higher degree of nanometer-scale roughness gave rise to ultra-hydrophobicity performance for bilayer coating C16TMS/TMOS + SiO2 NPs-C8 (145°), compared to other similar hybrid structures. Our synthesis method for the functionalization of SiO2 NPs is useful for the modification of surface polarity and roughness. |
| Databáze: | OpenAIRE |
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