Study on aqueous film-forming foam extinguishing agent based on the compound system of nonionic fluorocarbon and cationic hydrocarbon surfactants

Abstract

Abstract Halon fire extinguishing agent has the advantages of high fire extinguishing efficiency and no pollution to fire-fighting target, but it is gradually being phased out as ozone depleting substance. Therefore, as a substitute for Halon, the research of aqueous film forming foam extinguishing agent (AFFF) is in the ascendant. In this paper, three kinds of environmentally friendly aqueous film-forming foam extinguishing agent formula (F-1, F-2, F-3) were designed with the perfluorinated branched short-chain fluorocarbon nonionic surfactant (PBNS), N-octyl trimethyl ammonium bromide(OTAB) and dodecyl betaine(BS-12) compounded system as the foaming agent, and multiple foam performance experiments showed that F-1 had superior foam performance. The initial foam height h0 was 48 mm, 25% drainage time was 240 s, the fire extinguishing time was 60 s, and the burn-back time was 610 s. This kind of fire extinguishing agent had potential fire-fighting application and could be used as the potential substitute for Halon fire extinguishing agent.