Study on preparation of silicone-hydrocarbon surfactant compound foaming agent
As the core component of aqueous film-forming foam extinguishing agent,fluorocarbon surfactant is strictly restricted because of its difficulty in biodegradation and serious harm to the environment.A fluorine-free and environmentally friendly foam-ing agent compounded with silicone-hydrocarbon surfactant was developed.Several commercially available green and easily de-gradable silicone surfactants and hydrocarbon surfactants were se-lected,and their surface activity and foam properties were studied by foam scanner and interface rheometer.The single surfactant was optimized by single factor experiment method.The preferred silicone surfactant Silok 8022 and hydrocarbon surfactants AOS and LAMC were compounded by orthogonal experiment method,and the best foaming agent combination was obtained by range analysis of the results.The results showed that the optimal combi-nation of three kinds of silicone-hydrocarbon surfactants as foam-ing agents had excellent foaming properties.Compared with the fluorocarbon surfactant FS-61 foaming agent,the maximum foam volume of the silicone-hydrocarbon surfactant compound foaming agent increased by 7 mL,the maximum foam liquid con-tent increased by 2.28 mL and the 300 s drainage rate decreased by 3%.The fire extinguishing time of fluorine-free foam extin-guishing agent is 4 s shorter than that of commercial 3%aqueous film-forming foam extinguishing agent.Therefore,the compound foaming agent has good foam performance and fire extinguishing effect while being environmentally friendly.
silicone surfactanthydrocarbon surfactantsurface tensionfoam volumefoam liquid content300 s drainage rate
NETL
NSTL
万方数据
维普
