To develop an efficient and environmentally friendly fire extinguishing agent, hydrophobic SiO2 and deionized water were dispersed in a high-speed disperser for a period to form dry water. Cold-curing resin and potassium salts were then added to modify it. The microstructure was characterized using SEM, TEM, XRD, and EDS. The fire extinguishing efficiency of different dry waters on wood pile fires was tested using thermocouples and infrared thermal imaging cameras. Results indicate that cold-set resin colloids interconnect to form a network structure, enhancing the dry water's structural strength and improving its pressure resistance. Thermocouple tests on wood pile fires revealed all four dry water formulations effectively extinguished flames, with CH3COOK dry water demonstrating optimal performance. This suggests multiple extinguishing mechanisms: external SiO2 isolates oxygen, internal solution evaporation absorbs heat, and KOH decomposition products react with flame radicals. CH3COOK dry water holds promise as an efficient, eco-friendly fire suppressant.
Yaoyong et al. (Wed,) studied this question.