磷氮硼复配阻燃剂处理竹材的热降解及燃烧性能

The Thermal Degradation and Combustion Properties of Bamboo Treated with P-N-B Flame Retardants

采用3种磷酸铵盐（APP、DAP、MAP）分别与硼酸/硼砂复配化合物（SBX）进行复配,对毛竹（Phyllostachys edulis）竹条进行加压浸渍处理,利用热重分析仪、锥形量热仪比较分析了阻燃剂对竹材的热解行为及燃烧性能的影响。结果表明：阻燃处理竹材的热降解过程发生改变,起始降解温度降低,高温热解区间缩短,残余质量分数增加58%~74%。3种复配阻燃剂处理竹材燃烧后都能形成致密炭层,具有良好的阻燃和抑烟性能,其中MAP/SBX复配阻燃剂的阻燃效果最佳,阻燃处理竹材的热释放速率和发烟速率大幅度降低,热释放总量降低48.49%,发烟总量降低84.92%。

Moso bamboo（Phyllostachys edulis） strip had been treated with the composite flame retardants which mixed ammonium polyphosphate（APP）,diammonium phosphate（DAP）,monoammonium phosphate（MAP）with boric acid/borax（SBX） separately.The thermal degradation of samples was measured by thermal analysis;the combustion performance was characterized by cone calorimeter.Results showed that compared with untreated bamboo,the thermal degradation process of bamboo were changed by flame relardants.which decreased the initiative degradation temperature of bamboo,narrowed high-temperature decomposition,increased 58%~74%of the char yield.Bamboo samples treated with flame retardants formed a dense layer of nonflammable carbon after burning,which played an important role in flame retardancy and smoke suppression.The most effective flame retardants was the compound flame retardant of MAP/SBX system,whose peaks of Heat Release Rate（HRR） and Smoke Produce Rate（SPR） were declined and delayed after treatment,the Total Heat Release（THR） reduced by48.49%.and the Total Smoke Production（TSP） of treated samples reduced by 84.92%.