SiO<sub>2</sub>纳米颗粒对无氟泡沫灭火性能的影响

doi:10.11896/cldb.26040033

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Abstract To overcome the inadequate fire extinguishing performance of conventional fluorine-free foams, a novel composite fluorine-free foam extinguishing agent was formulated in this study. The formulation utilized an organosilicon surfactant (LS-408L) and a hydrocarbon surfactant (APG-0810) as foaming agents, guar gum (GG) as a foam stabilizer, and hydrophilic fumed SiO₂ nanoparticles as functional additives. The impact of SiO₂ nanoparticles concentration on the physicochemical properties of the foam mixtures, as well as their foaming ability, stability, fire extinguishing and burn-back performance, was systematically investigated. The findings indicate that the incorporation of GG reduces the surface activity while increasing the conductivity and viscosity of the LS-408L/APG-0810 system. The subsequent addition of SiO₂ nanoparticles further elevated the surface tension, conductivity, and viscosity in a concentration-dependent manner, concurrently leading to a continuous decline in foaming capacity. However, at a mass fraction of ≥2%, the SiO₂ nanoparticles significantly retarded the drainage and coarsening processes, thereby substantially enhancing overall foam stability. Furthermore, high concentrations of SiO₂ nanoparticles effectively reduced the fire extinguishing time and prolonged the burn-back time of the fluorine-free foam. Notably, the foam modified with 3wt% SiO₂ nanoparticles exhibited the optimal comprehensive performance in both fire extinction and burn-back. This research provides critical experimental data and theoretical insights for the application of nanomaterials in advanced fluorine-free foam extinguishing agents.

Key words： SiO₂ nanoparticles surfactant fluorine-free foam fire extinguishing performance

Published: 25 July 2026 Online: 2026-08-12

CLC number:

TQ569

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	Articles by authors
	ZHANG Fucheng
	XING Zhenqiang
	LI Long
	WANG Guangxiong
	BAI Fuqiang
	WANG Jianglong

Cite this article:

ZHANG Fucheng,XING Zhenqiang,LI Long, et al. Effect of SiO₂ Nanoparticles on Extinguishing Performance of Fluoride-free Foam[J]. Materials Reports, 2026, 40(14): 26040033-6.

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https://www.mater-rep.com/EN/10.11896/cldb.26040033 OR https://www.mater-rep.com/EN/Y2026/V40/I14/26040033

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