FABRICATION, STUDY OF PROPERTIES OF SiO2 NANOMATERIALS AND APPLICATION IN MECHANICAL PROCESSING

Abstract

This article presents the results of fabrication of silica (SiO₂) nanoparticles with size larger than 100 nm by Stöber method from the precursor Tetraethyl octhosilicate (TEOS), (C₂H₅O)₄-Si in ethanol solvent. Silica SiO₂ nanoparticles were formed through the solgel reaction form a porous matrix. The SiO₂ nanoparticles after fabrication were investigated for morphology and size through scanning electron microscopy (SEM). Information about the structure of SiO₂ nanoparticles was studied through X-ray diffraction (XRD) and Fourier transformed infrared spectroscopy (FT-IR). The stability of the particles in the solvent were investigated through measurement of Dynamic Light Scattering (DLS) and Zeta potential (z). The results show that, SiO₂ particles have spherical shape, uniform size, monodisper, stability in the solvent, amorphous phase structure. After fabrication, SiO₂ particles with large size (~130 nm) were mixed in lubricating solution and tested in composite drilling, the results show that the fabricated SiO₂ particles have many potential applications in mechanical processing.