Wood Science and Technology

, Volume 46, Issue 5, pp 939–952

Fire-retarding properties of nano-silver in solid woods


DOI: 10.1007/s00226-011-0455-6

Cite this article as:
Taghiyari, H.R. Wood Sci Technol (2012) 46: 939. doi:10.1007/s00226-011-0455-6


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®. Blocks of 150 × 130 × 9 mm³ 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.

Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.Wood Science and Technology Department, Faculty of Civil EngineeringShahid Rajaee Teacher Training University (SRTTU)Lavizan, Shabanloo St.Iran