DEVELOPING OF WOOD AND WOOD-ASH BASED HYDROXYAPATITE COMPOSITES: THIRE DURABILITY AND FIRE RETARDING PROPERTIES

摘要

In order to reutilize the waste wood ash emitted from woody biomass power plants, the Hydroxyapatite (HAp) solution was synthesized by reacting the wood ash with phosphate, and then the solution was impregnated into woods to make the wood-Hydroxyapatite composites. During the outdoor weathering test with 2 years exposure in full sunshine, the HAp composites show efficacy in retarding the color fading of woods. Also in fire-retarding test with cone calorimeter, the heat release rates and total heat releases of the HAp-composites were decreased with increased amount of the injected HAp solution. Although the amount of HAp injection in this trial was still not enough to keep fully effects as non-combustible wood composites, the HAp treatment have some effect for improving the fire retarding property of the treated woods.