The surface modification and characterization of SiO2 nanoparticles for higher foam stability

Abstract The surfactant and colloidal nanoparticles has been considered for various applications because of interaction of both complex mixtures. The hydrophilic SiO 2 nanoparticle could not be surface active behavior at the liquid/air interface. In this study, the SiO 2 nanoparticles have been modified with 3-isocyanatopropyltriethoxy-silane (ICP), and the effect of foam stability has been investigated. The physical properties of surface modified SiO 2 nanoparticle were analyzed by XRD, TGA, FT-IR, and SEM. After surface modification of SiO 2 nanoparticles, the contact angle of SiO 2 nanoparticle was also increased from 62° to 82° with increased ICP concentration. The experimental result has shown that SiO 2 nanoparticle with ICP was positive effect and improved foam stability could be obtained at proper ICP concentration compared with un-modified SiO 2 nanoparticle.