PTES MODIFIED SILICA FILMS; SYNTHESIS AND CHARACTERIZATION

The present paper describes dip coated water repellent silica coatings on the glass substrates using phenyltriethoxysilane (PTES) as a co-precursor, tetraethoxysilane (TEOS) as a precursor, ethanol (EtOH) as a solvent and ammonium hydroxide (NH4OH) as a catalyst via sol-gel method. In order to study the influence of the modifying agent on the hydrophobic properties of the silica films, the molar ratio of PTES/TEOS (H) was varied between 0.05 and 1.2. The static water contact angle values of the silica coatings increased up to 133º with an increase in the H value from 0 to 0.05. However, with further increase in H value, the water contact angle and surface modification decreased whereas the size of nanoparticles increased from 36 to 45 nm. The hydrophobic silica films were characterized by atomic force microscopy (AFM), fourier transform infrared spectroscopy (FTIR),contact angle measurement (CA), and field emission scanning electron microscopy (FE-SEM) images.

کلیدواژه ها:

Silica film ، PTES ، Sol-gel method ، Wettability