Research on preparation and fire extinguishing performance of temperature-sensitive hygrogel

Abstract

In order to widen the application and enhance the fire extinguishing efficiency of ordinary gel,a temperature-sensitive hydrogel P(NIPA-co-SA)was synthesized by phase separation.The product structure,temperature-sensitivity performance and relevant physical parameters were characterized through Fourier transform infrared spectrometer,surface tensiometer and viscometer.According to national standard GB17835-2008,the solid combustible fire experiment rig was established,and the fire extinguishing performance of water,ordinary gel and temperature-sensitive hydrogel were comparatively studied.The results show that:synthesized product is target product P(NIPA-co-SA).Because of volume phase transition(VPT)hydrogel became gelled when temperature is above lower critical solution temperature(LCST),and the surface tension was low and viscosity was high.0.3% is the recommended concentration for temperature-sensitive firefighting foam preparation,which can effectively quench solid combustible fire.Its fire extinguishing performance is better than that of water and ordinary fire extinguishing agent.