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 SiO₂ nanoparticle could not be surface active behavior at the liquid/air interface. In this study, the SiO₂ nanoparticles have been modified with 3-isocyanatopropyltriethoxy-silane (ICP), and the effect of foam stability has been investigated. The physical properties of surface modified SiO₂ nanoparticle were analyzed by XRD, TGA, FT-IR, and SEM. After surface modification of SiO₂ nanoparticles, the contact angle of SiO₂ nanoparticle was also increased from 62° to 82° with increased ICP concentration. The experimental result has shown that SiO₂ nanoparticle with ICP was positive effect and improved foam stability could be obtained at proper ICP concentration compared with un-modified SiO₂ nanoparticle.