新型高效无氟泡沫灭火剂的制备及其性能表征

Preparation and characterization of a new high efficiency fluorine-free foam extinguishing agent

提出了一种由黄原胶、纳米二氧化硅颗粒和复配表面活性剂组成的新型环保型泡沫灭火剂,用于迅速扑灭易燃液体火灾。利用荧光分光光度计、液滴形状分析仪、润滑油抗泡沫特性测试仪以及双目透射偏光显微镜等试验研究了泡沫灭火剂的表面性能、聚集特性和发泡行为。结果表明,黄原胶以及二氧化硅纳米颗粒的加入使得10 min之内的泡沫稳定性保持在85%以上。通过泡沫性能测试,配比出最优异的泡沫性能,初始泡沫体积为905 mL,25%排水时间为300 s,10 min之内的排水量为105 mL,显著提升了泡沫的起泡性能和泡沫稳定性。随后使用该配方进行小型灭火试验,灭火时间为18 s,抗烧时间为650 s。

A new environment-friendly foam extinguishing agent composed of xanthan gum,nano-silica particles and compound surfactants is proposed to quickly extinguish flammable liquid fires.The surface properties,aggregation characteristics and foaming behavior of foam extinguishing agent were studied by fluorescence spectrophotometer,droplet shape analyzer,lubri⁃cant anti-foam property tester and binocular transmission polariza⁃tion microscope.The results showed that the stability of the foam remained above 85%with the addition of xanthan gum and silica nanoparticles.Through the foam performance test,the best foam performance is matched,the initial foam volume is 905 mL,the 25%drainage time is 300 s,and the displacement is 105 mL within 10 min.The foaming performance and foam stability of the foam are significantly improved.Subsequently,by using the for⁃mula to carry out small fire extinguishing experiments,the fire extinguishing time is 18 s,and the reignition time is 650 s,this fire extinguishing agent has the potential for fire protection applications.