College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China.
College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China.
J Hazard Mater. 2018 Sep 5;357:271-278. doi: 10.1016/j.jhazmat.2018.05.068. Epub 2018 May 31.
In this article, smoke suppression of Si-Al mesoporous structure on medium density fiberboard (MDF) was investigated by cone calorimeter test (CCT), scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), and fourier transform infrared spectrometry (FTIR). The CCT results show that the Si-Al mesoporous structure can effectively decrease heat release rate (HRR), total heat release (THR), smoke production rate (SPR), total smoke production (TSP), smoke rate (SR), CO and CO concentration, etc. Particularly, the SR curves of MDF present that Si-Al mesoporous structure are considered to be a filter, which can net the solid particles and volatile flammable components in the smoke and fix onto wood fiber. Remarkably, the CO and CO concentration curves of MDF indicate that the Si-Al mesoporous structure has an excellent adsorption property, which can rapidly absorb CO and CO that generated in wood combustion process. On the other hand, the FTIR and TGA results reveal that the Si-Al mesoporous structure can significantly improve the structure of char residue.
本文采用锥形量热仪（CCT）、扫描电子显微镜（SEM）、热重分析（TGA）和傅里叶变换红外光谱（FTIR）研究了 Si-Al 介孔结构对中密度纤维板（MDF）的抑烟作用。CCT 结果表明，Si-Al 介孔结构能有效降低热释放速率（HRR）、总热释放量（THR）、生烟速率（SPR）、总生烟量（TSP）、烟释放率（SR）、CO 和 CO 浓度等。特别地，MDF 的 SR 曲线表明，Si-Al 介孔结构可以作为一种滤网，捕获烟雾中的固体颗粒和挥发性可燃成分，并固定在木纤维上。值得注意的是，MDF 的 CO 和 CO 浓度曲线表明，Si-Al 介孔结构具有优异的吸附性能，能迅速吸收木材燃烧过程中生成的 CO 和 CO。另一方面，FTIR 和 TGA 结果表明，Si-Al 介孔结构能显著改善炭残留物的结构。
