基于锥形量热仪法研究了马尾松、落叶松、杉木、泡桐、杨木等木材及胶合板、中密度纤维板(MDF)燃烧时发烟和烟气温度的变化规律,分析了辐射强度对木材及木质复合材料燃烧时发烟和烟气温度的影响。结果表明:木材及木质复合材料发烟和烟气温度的变化规律以“强―弱―强―弱”模式变化,发烟的强弱和烟气温度的高低与质量损失速率密切相关,即木材及木质材料质量损失速率越大,发烟越强,烟气温度也越高。以木纤维为复合单元的MDF发烟总量最大,其次是针叶树材,最小的为阔叶树材和胶合板。随着辐射强度的提高,木材及木质复合材料燃烧时的发烟总量和烟气温度呈增加或提高趋势,而且第2发烟峰和烟气温度峰有提前出现的趋势。Wood and wood-based panels would produce a large amount of smoke during the combustion. It has great guiding significance to study its smoke regularity and characteristic for the application and exploitation of correlated smoke inhibition technology. The characteristics of smoke production and the regularity of the change in smoke temperature of Pinus massoniana, Larix gmelinii, Cunninghamia lanceolata(Lamb.)Hook, Paulownia, Populus, plywood and medium density fiberboard(MDF)were studied with a cone calorimeter(CONE). Effect of the irradiance intensity on smoke production and temperature was also discussed. The results showed that the smoke emission process and temperature of wood and wood-based panels changed similarly, i.e., “strong-weak-strong-weak”. The variation of smoke production and temperature was corresponding to the mass lose rate, namely, the smoke production and temperature increased with the mass lose rate increasing. The total smoke production of MDF was the highest followed by softwood, hardwood and plywood. The smoke production and temperature increased and the second peaks appeared earlier with the irradiance intensity increasing
