水增粘后的流动特征及灭火性能研究

Study on fire extinguishing effect of water with viscosity enhanced by nano-titania

加入0.4%的复合增稠剂,使水的流动性得到改善,而制成具有粘附特性的水相灭火剂,在固体表面可形成1~5 mm的稳定覆盖层,能快速扑灭火焰,防止复燃。粘附灭火剂具有一定的屈服应力(7.7 Pa),并具有剪切稀化的特性,因此可在物体表面形成稳定的覆盖层,且输送阻力较低。木材火灾灭火实验发现该粘附灭火剂的灭火时间是清水灭火的四分之一。该灭火剂配制简便且成本也低。

When added 0.4% nano-SiO2 multiple thickener to water,An adhesive aqueous-phase fire extinguishing agent can be obtained.It can form 1-5 mm stable layer upon the surface of solid,quickly extinguish fire and prevent recombusting.The yield stress of the fire extinguishing agent can be 7.7 MPa,and it has shear thinning properties,so it can form stable layer upon the surface of the solid and the transportation resistance is low.Wood fire extinguishing test shows the agent's extinguishing speed is four times faster than water.This agent can be easily prepared at a very low cost.