NSCFR木材阻燃剂阻燃抑烟特性及其作用机制

Study on flame-retardation and smoke-suppression characteristics and mechanisms of NSCFR flame retardant for wood

NSCFR木材阻燃剂是实现木基复合材料无烟不燃的关键要素。采用热分析技术、锥形量热、Py-GC/MS分析、扫描电镜等方法研究了NSCFR木材阻燃剂的阻燃抑烟特性及其作用机制。结果表明:NSCFR阻燃剂能显著缩短木基复合材料持续燃烧时间,完全消除热释放曲线第二释热峰,大幅降低热释放速率和燃烧总热、质量损失速率、比消光面积和CO与CO2总生成量,提高燃烧残炭量,有效阻滞木材燃烧,抑制烟雾毒气释放;NSCFR阻燃剂通过自由基捕捉、可燃气体稀释以及化学催化成炭复合机理实现阻燃作用;NSCFR阻燃剂通过纳米蜂窝状结构吸附机理和钼酸铁活性催化分解机理实现抑烟减毒效果。

NSCFR flame retardant is one of key factors of non-smoke combustible wood-based materials. Thermal analysis, cone calorimetry, Py-GC/MS, scanning electron microscopy （SEM） were utilized to investigate the flame-retardation and smoke-suppression characteristics and mechanisms of NSCFR flame-retardant. The results show that NSCFR flame-retardant could significantly shorten the combustion duration of wood-based materials and completely eliminate the second peak of heat release rate curve, greatly reduce heat release rate, total smoke release, mass loss rate, specific extinction area, and carbon monoxide production and carbon dioxide production, obviously enhance the mass of combustion char residue, effectively retarding the combustion and inhibiting smoke release of the wood- based material, NSCFR flame-retardant exhibits the ability of flame retardancy on wood by the conjunct mechanism of capturing free radical, diluting combustible gas, and catalyzing charring, NSCFR flame-retardant displays smoke suppression effects on wood by absorption action ofnano alveolate structure together with the active catalyzing action of ironic molybdate.