典型水成膜泡沫灭火剂流变性研究  

Rheological Properties of Typical Aqueous Film-forming Foam

作　　者：张佳庆 尚峰举 黄杰 张含灵 盛友杰 ZHANG Jiaqing;SHANG Fengju;HUANG Jie;ZHANG Hanling;SHENG Youjie(State Grid Anhui Electric Power Research Institute,Anhui Province Key Laboratory of Electric Fire and Safety Protection(State Grid Laboratory of Fire Protection for Transmission and Distribution Facilities),Electric Power Fire Technology Professional Committee of Anhui Society for Electrical Engineering,Hefei 230601,China;State Grid Anhui Electric Power Co.,Ltd.,Hefei 230022,China;College of Safety Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China)

机构地区：[1]国网安徽省电力有限公司电力科学研究院电力火灾与安全防护安徽省重点实验室(国家电网公司输变电设施火灾防护实验室),安徽省电机工程学会电力消防技术专业委员会,合肥230601 [2]国网安徽省电力有限公司,合肥230022 [3]西安科技大学安全科学与工程学院,西安710054

出　　处：《材料导报》2025年第5期277-282,共6页Materials Reports

基　　金：国网安徽省电力有限公司科技项目(52120523000L)。

摘　　要：水成膜泡沫(Aqueous film-forming foam,AFFF)灭火剂是公认扑救大规模油类火灾最有效的灭火介质,流变性对AFFF的应用有重大影响。为探究AFFF的流变性,研究了四种商用AFFF原液(两种普通3%AFFF和6%AFFF,两种抗溶型3%AR-AFFF和6%AR-AFFF)及不同温度下泡沫的流动行为和粘弹性。结果表明,四种AFFF原液都具有明显的剪切稀化行为,AFFF原液的流动曲线与Cross模型一致。两种AR-AFFF原液均呈现粘弹性固体特征,具有较高的屈服极限,而两种普通AFFF原液呈现粘弹性流体特征。四种泡沫也都呈现出剪切稀化行为,流动曲线符合HerschelBulkley模型。四种泡沫均呈现粘弹性流体特征,损耗模量(G″)总是大于储能模量(G′)。四种泡沫的剪切应力、表观黏度、G′和G″等参数均随着温度的升高而逐渐降低,对温度有明显的依赖性。AFFF流变性的差异主要取决于构成组分(表面活性剂与多糖聚合物)。研究结果有望促进新型AFFF在火灾中的高效应用。Aqueous film-forming foam(AFFF)is the most effective extinguishing medium for large-scale oil fires,and its rheology has a great influence on its application.In order to investigate the AFFF rheology,the flow behavior and viscoelasticity of four commercial AFFF concentrates(two ordinary 3%AFFF and 6%AFFF,two alcohol resistant 3%AR-AFFF and 6%AR-AFFF)and foams at different temperatures were studied.The results show that the four kinds of AFFF concentrates have obvious shear thinning behavior,and the flow curves of the AFFF concentrates are consistent with the Cross model.The two AR-AFFF concentrates exhibit the properties of viscoelastic solids with high yield limits,while the two ordinary AFFF concentrates show the characteristics of viscoelastic fluid.All four AFFF foams also exhibit shear-thinning behavior,and the flow curves are consistent with the Herschel-Bulkley model.All four foams exhibit viscoelastic fluid characteristics,and the loss modulus(G″)is always greater than the storage modulus(G′).The shear stress,apparent viscosity,G′,G″and other parameters of the four foams decrease gradually with the increase of temperature,and show an obvious dependence on temperature.The difference in the rheology of AFFF depends mainly on the constituent components(surfactants and polysaccharide polymers).The results of this work are helpful to promote the efficient ap-plication of new AFFF in fire.

关 键 词：水成膜泡沫 泡沫 流动行为 粘弹性 本构方程 

分 类 号：TQ569[化学工程—炸药化工]