基于氮磷阻燃剂的轻质木丝板阻燃性能研究

Study on fire-retardation performance of light wood wool board treated with nitrogen-phosphorus fire-retardant

用氧指数、锥形量热等方法研究了浸渍和喷涂氮磷阻燃剂后轻质木丝板的阻燃性能,并采用SPSS软件统计分析各性能之间的关系。结果表明:随着阻燃溶液浓度的增大,阻燃轻质木丝板载药率和氧指数均增加,浸渍处理木丝载药率明显高于喷涂处理木丝,但两者氧指数值相差不大;成板浸渍、木丝浸渍和木丝喷涂阻燃处理轻质木丝板释热速率明显低于对照组,且第二放热峰完全消失,燃烧时间约150 s,比对照组减少了75%,点火时间延长,平均有效燃烧热分别降低了81%、78%、77%,质量损失速率分别降低了35%、53%、41%;对照组试件燃烧释放总热大于50 MJ/m2,而阻燃处理试件最低仅为4 MJ/m2,降低约90%;阻燃处理试件CO2气体释放量降低,CO释放量略高,但总烟产量减小;聚类分析说明成板浸渍、木丝浸渍和喷涂方法均优于成板喷涂处理轻质木丝板;热释放速率与总烟产量呈显著正向关,与比消光面积呈显著负相关关系。

The fire-retardation performance of light wood wool board （LWWB） by means of spraying nitrogen-phosphorus fire-retardant and dipping treatment, and through applying oxygen index（OI） method and cone calorimeter （CC） method. The results show that： with increase of fire retardant solution concentration, the drug content and oxygen index of the LWWB both increased, the drug amount of dipping treatment board was apparently higher than that of spraying treatment, both treatments＇ oxygen indexes differed by less; The heat release rates （HRR） of the boards treated by formed board dipping, wood wool dipping and spraying fire-retardant to wood wool were significant lower than that of the control group; the second exothermic peak values of the formers were completely disappeared, the combustion duration was 150 seconds, the HRRs were shortened by 75%, the ignition time was extended; Compared to the control group, the average effective heat of combustion （AEHC） decreased by 81%, 78% and 77%, The mass loss rate （MLR） lowed down by 35%, 53% and 41%; The total combustion heat release （TCHR） of control sample was more than 50 MJ/m2 and the TCHR of treated boards decreased by 90% only to be 4 MJ/m2; The smoke release （CO2 gas emissions） of the boards reduced, CO emission was slightly higher than that of the control group, the total gas production reduced. The results of cluster analysis indicated that the boards treated by formed board dipping, wood wool dipping and spraying fire-retardant to wood wool were superior to formed board treatment in terms of quality; The heat release rate showed a positive correlation with total smoke production, the heat release rate took a negative correlation with specific extinction area.