Influence of hydrophobic characteristic of organo-modified precursor on wettability of silica film

Bulletin of materials science

Adriana Balan¹  Marius Ghiurea⁴  Dan Donescu⁴  Violeta Purcar³  Simona Caprarescu²  Otilia Cinteza⁵ 

[1] Faculty of Physics, University of Bucharest, 3Nano-SAE Research Centre, P.O. Box MG-38, 077125 Bucharest-Magurele, Romania$$Faculty of Physics, University of Bucharest, 3Nano-SAE Research Centre, P.O. Box MG-38, 077125 Bucharest-Magurele, RomaniaFaculty of Physics, University of Bucharest, 3Nano-SAE Research Centre, P.O. Box MG-38, 077125 Bucharest-Magurele, Romania$$;Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Polizu St., 011061, Bucharest, Romania$$Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Polizu St., 011061, Bucharest, RomaniaFaculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Polizu St., 011061, Bucharest, Romania$$;National Research and Development Institute for Chemistry and Petrochemistry ICECHIM, Splaiul Independentei no. 202, 6th district, P.O. Box 35-174, 060021 Bucharest, Romania$$Faculty of Physics, University of Bucharest, 3Nano-SAE Research Centre, P.O. Box MG-38, 077125 Bucharest-Magurele, Romania$$National Research and Development Institute for Chemistry and Petrochemistry ICECHIM, Splaiul Independentei no. 202, 6th district, P.O. Box 35-174, 060021 Bucharest, RomaniaNational Research and Development Institute for Chemistry and Petrochemistry ICECHIM, Splaiul Independentei no. 202, 6th district, P.O. Box 35-174, 060021 Bucharest, Romania$$Faculty of Physics, University of Bucharest, 3Nano-SAE Research Centre, P.O. Box MG-38, 077125 Bucharest-Magurele, Romania$$Faculty of Physics, University of Bucharest, 3Nano-SAE Research Centre, P.O. Box MG-38, 077125 Bucharest-Magurele, RomaniaNational Research and Development Institute for Chemistry and Petrochemistry ICECHIM, Splaiul Independentei no. 202, 6th district, P.O. Box 35-174, 060021 Bucharest, Romania$$Faculty of Physics, University of Bucharest, 3Nano-SAE Research Centre, P.O. Box MG-38, 077125 Bucharest-Magurele, Romania$$;National Research and Development Institute for Chemistry and Petrochemistry ICECHIM, Splaiul Independentei no. 202, 6th district, P.O. Box 35-174, 060021 Bucharest, Romania$$National Research and Development Institute for Chemistry and Petrochemistry ICECHIM, Splaiul Independentei no. 202, 6th district, P.O. Box 35-174, 060021 Bucharest, RomaniaNational Research and Development Institute for Chemistry and Petrochemistry ICECHIM, Splaiul Independentei no. 202, 6th district, P.O. Box 35-174, 060021 Bucharest, Romania$$;Faculty of Chemistry, University of Bucharest, Bd. Regina Elisabeta 4-12, 1st district, Bucharest, Romania$$Faculty of Chemistry, University of Bucharest, Bd. Regina Elisabeta 4-12, 1st district, Bucharest, RomaniaFaculty of Chemistry, University of Bucharest, Bd. Regina Elisabeta 4-12, 1st district, Bucharest, Romania$$

关键词: Hydrophobic surfaces;    silica hybrids;    solâ€�?�gel process;    hydrophobic silica;    coatings.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The objective of this study is to design new hybrid silica materials as templates with hydrophobic properties, prepared at room temperature by a base catalyzed sol�?�gel process. As silica sources, organoalkoxysilanes functionalized with short hydrophobic chains were used: tetraethylorthosilicate (TEOS), methyltriethoxysilane (MTES), vinyltriethoxysilane (VTES), octyltriethoxysilane (OTES) and isobutyltriethoxysilane (iTES). It was shown that hydrophobicity of the functionalized silica nanoparticles increased as a function of length of the aliphatic chains (MTES < iTES < OTES) or when, instead of a hydrophobic alkyl chains (substituting group of silica precursors), a monounsaturated group was used (VTES). It was observed that the samples responded in a specific way to each type (hydrophilic or hydrophobic) of the dropped liquid. Even though the experiments were limited to short hydrocarbon chains, they showed that there is a threshold to reach high hydrophobicity of the hybrid surface.

【 授权许可】

Unknown