Fire-retarding properties of nano-silver in solid woods

被引:58
作者
Taghiyari, Hamid Reza [1 ]
机构
[1] SRTTU, Wood Sci & Technol Dept, Fac Civil Engn, Tehran, Iran
关键词
MECHANICAL-PROPERTIES;
D O I
10.1007/s00226-011-0455-6
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
Fire-retarding properties of 200 ppm nano-silver solution, with a size ranging from 20 to 80 nm, on five woody species were studied and compared with Borax and Celcune (A (R)) . Blocks of 150 x 130 x 9 mmA(3) were prepared and divided into four groups of control samples, nano-silver-, Borax-, and Celcune-impregnated specimens. A special apparatus was designed, and six fire-retarding properties of each specimen were measured, namely ignition, glowing, back-darkening and back-holing times, as well as length and width of burning. Results showed that all three kinds of treatments had improving effects on the fire-retarding properties. Celcune showed the best improvement on glowing time. Cluster analysis showed direct relation between density and fire-retardant properties; also, fire-retarding behaviors of the four hardwoods were quite different to those of the one softwood. Furthermore, there are improvements in some fire-retarding properties of nano-silver-impregnated specimens that are in connection with its heat-transfer property.
引用
收藏
页码:939 / 952
页数:14
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