Abstract:The foam mixed system was prepared by using short-chain fluorocarbon surfactant (FS-50), anionic hydrocarbon surfactant (SDS), hydrophilic SiO2 nanoparticles and water-soluble polymers (sodium carboxymethyl cellulose (NaCMC) and xanthan gum (XG)). The effect of nanoparticles and polymers on the molecular interactions and foam properties of FS-50/SDS mixed systems were systematically investigated. Results indicate that there are strong molecular interactions in the FS-50/SDS/nanoparticle/polymer system, resulting in complex changes in its surface activity, viscosity and conductivity. 5% SiO2 nanoparticles can improve the foam stability and foaming ability of FS-50/SDS mixed system. 0.05% XG or 0.5% NaCMC can improve the foam stability of FS-50/SDS mixed system while decreasing its foaming ability. The nanoparticles and polymers can synergistically improve the foam stability of FS-50/SDS mixed system. However, the presence of simultaneous nanoparticles and polymers significantly decreases the foaming ability of FS-50/SDS mixed system. The results of this study can provide theoretical guidance for the development of foam stabilizers with excellent properties.