CONICET | Buscador de Institutos y Recursos Humanos

Zirconia is a widely used multifunctional material. Its interesting properties, such as high chemical resistance, thermal stabilityand high mechanical toughness, have turned this material into object of study within fields such as optics, electronics, andmagnetism, among others. In recent years, the chemical properties of zirconium oxide have been used, mixed with silicon, inorder to obtain more stable and robust mixed oxides, with the final application of toughening ceramics. These properties arerelated to the degree of mixing of the components at molecular level, therefore, the linking between Si-O-Zr. Considering theeffective antimicrobial capacity of silver nanoparticles, their incorporation into different materials is very interesting, acting asbiocides. The objective of this work is to obtain zirconium oxides by the sol-gel technique, using zirconium n-propoxide asprecursor, and also to study the effect of different solvents (water, ethanol) and the use of various acid catalysts in the synthesis[acetic acid and a heteropolyacid (HPA), as the phosphomolybdic acid (H3PMo12O40)] on the physicochemical properties of theobtained solids. Finally, the addition of a silver salt was carried out into the sample with acetic acid and heteropolyacid ascatalyst, in order to incorporate it as antimicrobial filler in paints. The obtained materials were characterized by SEM, XRD, FTIR,textural properties through the absorption of N2 (SBET) and potentiometric titration with n-butylamine. Homogeneous solidswere obtained in all the synthesis with acetic acid as catalysts. In addition, x-ray diffraction diagrams of amorphous solids wereobserved. The values obtained of surface areas are influenced by the variables of synthesis. The characteristic bands of zirconiawere observed by FTIR in the solids synthesized. The results show that the solids environmentally synthesized are promisingadditives for use in paints.

enviar mensaje