Study On Application Of Quaternary Ammonium Salt For Wood Preservative

Because commonly used acidic copper/chromium/arsenic solution(CCA) or ammoniacal copper and arsenic salt solution preservatives include potentially dangerous heavy metals. The use of copper in the above formulations may raise environmental and corrosion concerns. The Quaternary Ammonium Compounds have distinct environmental and safety advantagesThis study discloses a method of preserving wood by impregnation with a quaternary ammonium compound, wherein the quat anion is from the group consisting of chloride, acetate, and propionic acid. We determine the effect of quaternary ammonium compound against Corio]us vcrsioo]or (Fr. ) Cooke, the weight loss is 7.2% ?7.9% . 7.6%.Then we determine quaternary ammonium compound and copper , comparing the efficacy of CTL.. PCP桸a.. Propiconazole and CCA against Corio]usvcrsioo]or (Fr.) Cooke, theweight loss is 1.1%, 2.8%, 3.3%; thenusing Poria plaoenta (Fr.) Cooke as test fungus, the weight loss is 1. 6%~ 0. 1%.. 4. 5%. When CuO/quaternary ammonium compound is 2:1~ CuO/NH3 is l:3~. CuO/C02 is 1: 1 and mixed didecyldimethylammonium acetate , the wood preservative systems can offer better protection against both biological and physical decomposition of wood. In most instances the carboxylate quats are more leach resistant than chloride quats.The carboxylic groups in hemicellulose and the phenolic hydroxyl and ester groups in lignin are the major bonding sites for copper, as confirmed by FTIR.