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A Study on the Basic Properties of Wood Impregnated with Inorganic Compounds  

Kim, Geon Hyoung (Department Group of Forestry and Wood Science & Technology, Kyungpook National Univ.)
Oh, Tae Kyung (Department Group of Forestry and Wood Science & Technology, Kyungpook National Univ.)
Lee, Weon Hee (Department Group of Forestry and Wood Science & Technology, Kyungpook National Univ.)
Publication Information
Journal of the Korean Wood Science and Technology / v.34, no.4, 2006 , pp. 15-21 More about this Journal
Abstract
Composite materials were prepared by impregnating water glass into the wood, followed by soaking in solutions of boric acid or phosphoric acid. The effects of these treatments on the physical and mechanical properties of the specimens and especially on its heat resistance were investigated. 1) Weight Percent Gain (WPG)s increased with increase of concentrations of water glass. However, there was little relationship between treatment temperatures and WPG. Generally, WPGs of double treated specimens were higher than single treated ones. 2) Percent shrinkages in each directions of the specimens treated with water glass had higher value than other specimens. Percent shrinkages of the specimens treated with boric acid or phosphoric acid were decreased as compared with untreated specimen. However, the specimens treated with water glass or phosphoric acid showed very high hygroscopicity. 3) The bending strengths of all specimens treated inorganic substances were slightly decreased. However, the values of compressive strength and hardness of most specimens treated with inorganic substances increased or similar to that of untreated specimen except for a phosphoric acid treated specimens. 4) The specimens had good heat resistance. Weight losses of all specimens treated inorganic substances were about 50~70%. In particular, the specimens treated at $300^{\circ}C$ and $400^{\circ}C$ almost kept their shapes.
Keywords
inorganic substances; water glass; heat resistance;
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