Abstract
Nanoparticle-stabilized foams have a potential prospect used as new environmentally-friendly firefighting foams. The thermal stability of firefighting foam is a significant ability to resist on thermal radiation from flame. In the present study, the mixed dispersions of foams consisting of β-Al2O3 nanoparticles, hydrocarbons (APG-0810), and fluorocarbon surfactants (FS-50), are prepared. The basic properties, including foaming ability and foam drainage at room temperature of the mixed dispersions, are investigated. The foam stability under thermal radiation is evaluated. The results reveal that the presence of β-Al2O3 nanoparticles increases the conductivity and viscosity of the mixed dispersions, while the surface tension and foaming ability of the mixed dispersions first decreases and then increases with increasing β-Al2O3 nanoparticle concentration. The addition of β-Al2O3 nanoparticles significantly retards foam drainage and improves foam stability at room temperature. Also, the foam thermal stability can be effectively improved by the presence of incorporation of β-Al2O3 nanoparticles. The results can provide a basis for the application of β-Al2O3 nanoparticles in the development of POPs-free firefighting foams.
Published Version
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