典型硼化合物对毛竹热降解与燃烧性能的影响

利用热重和锥形量热仪研究硼酸、硼砂两种典型硼化合物对毛竹热降解和燃烧性能的影响。结果表明:硼酸、硼砂能降低竹材的最大热解速率,缩短高温热解区间,促进残炭生成。与未处理材相比,硼酸、硼砂明显减少竹材燃烧过程中的热量释放,热释放速率降至未处理材的50%左右,总热释放量的降幅分别达50.6%、44.1%。硼酸、硼砂也能抑制竹材燃烧时的烟释放,总烟释放量分别下降95.3%、91.6%。硼酸、硼砂处理竹材能发挥高效的阻燃抑烟功效。

Effect of typical boron compounds on the thermal degradation and combustion properties of Phyllostachys pubescens

The combustion and thermal degradation of moso bamboo (Phyllostachys pubescens) treated by boric acid and borax respectively, were characterized by TG and CONE. Results showed that, these two typical compounds had positive effects on decreasing the maximum pyrolysis rate, narrowing high-temperature decomposition, and promoting the yield of residual char when moso bamboo subjected to thermal decomposition. The treated bamboo exhibited less heat and smoke release compared to the control. Total heat release for borax and boric treated bamboo decreased by 50.6 % and 44.1 %, respectively. While, the total smoke release decreased by 95.3 % and 91.6 %, respectively. Applications of boric acid and borax have significant influence on protecting bamboo substrate from thermal degradation and combustion.