The surface modification and characterization of SiO 2 nanoparticles for higher foam stability

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.