TY - JOUR AU - HR Taghiyari, PY - 2022/05/31 Y2 - 2024/03/28 TI - EFFECTS OF NANO-SILVER IMPREGNATION ON SOME MECHANICAL PROPERTIES OF ICE-BLASTED WOOD SPECIMENS JF - Journal of Tropical Forest Science (JTFS) JA - JTFS VL - 24 IS - 1 SE - Articles DO - UR - https://jtfs.frim.gov.my/jtfs/article/view/481 SP - 83-88 AB - <p>Taghiyari HR , Rassam G, Lotfine jad Sani y &amp; Karimi A. 2012. Effects of nano-silver impregnation on some mechanical properties of ice-blasted wood specimens. Ice blasting (frozen CO<sub>2</sub>, -78.5 °C) is one of the modern methods of cleaning for industrial purposes. Effects of ice blasting were studied on untreated solid wood as well as 200 ppm nano-silver impregnated wood of <em>Populus nigra</em> (poplar) and Fagus orientalis (beech). Modulus of rupture (MOR), modulus of elasticity (MOE) and compression strength parallel to the grain were measured. Ice blasting decreased MOR by 31.5 and 6% in poplar and beech respectively. However, when specimens were impregnated with nano-silver, MOR would only decrease by 4.8% in beech and increase by 1.7% in poplar. Ice blasting decreased MOE and compression strength parallel to the grain by 62.5 and 2.5% respectively in poplar, and 8.6 and 4.4% in beech. The lower the density of a wood the more mechanical properties would decrease in untreated wood as a result of ice blasting. On the other hand, nano-silver impregnation decreased the amount of losses in MOR, MOE and compression strength parallel to the grain. Heat conductivity of nano-silver particles transferred the cold accumulated on the surface layers of specimens. Consequently, mechanical properties would be improved by preventing the formation of microscopic fissures and surface checks.<br /><br /></p> ER -