Caracterización de películas delgadas de vidrio dopadas con colorantes naturales mediante proceso Sol-Gel

Abstract

Abstract:In the present work an analysis of the physical properties of thin glass films based on three natural coloring products: beet, achiote and oregano was carried out. In this work, the films were obtained by liquid method using the sol -gel method: Technique consisting of the preparation of the sol using titanium tetraisopropoxide, iso-propanol, acetic acid and water as a precursor. With regard to natural dyes, these are products obtained by the maceration of three plant species: curcuma longa, bixa orellana, and origanum vulgare (using iso-propanol as solvent). Regarding the elaboration of the thin films, these were elaborated based on the technique of centrifugation using square objects as substrates, later the glasses were dried at room temperature. Finally, three characterization processes were carried out: Optical characterization, electrical characterization and mechanical characterization. In the first characterization, the absorption, reflection and transmission rates were measured; in the second, the photo and thermo resistivity indexes were determined, finally, in the last characterization, the uniformity analysis of the surface of the films was carried out.