ACQ防腐剂浓度对速生杨木载药量和渗透深度的影响

Influence of the preservative concentration on the penetration depth and ACQ content in the treated poplar

使用0.1%、0.5%和1.0%浓度的ACQ防腐药液对杨木进行常压浸渍和加压处理,研究其载药量和浸渍深度。结果表明,随着ACQ浓度的增加,载药量随之增加,且影响显著。常压下用1%浓度的ACQ浸渍杨木72 h,载药量可达到国家标准规定的C1级使用要求。渗透深度与浓度呈负相关,浓度越高,渗透深度越小。在相同浓度下,径向、弦向的渗透性差异不显著。与常压处理材相比,速生杨木加压处理后,轴向、径向和弦向的渗透性均得到了不同程度的改善,且两者之间差异显著。

Under atmospheric pressure and a pressure of 0.6 MPa,the fast-grown poplar wood was treated with a water-soluble ACQ preservative at concentrations of 0.1%,0.5% and 1.0%.The content of ACQ in wood and the depth of preservative penetration were examined.The results showed that the content of ACQ in wood was increased significantly with the increase of the preservative concentration.The requirements of Chinese preservation standards（grade C1） were met when the wood was treated with 1.0% ACQ preservative under atmospheric pressure for 72 hours.The penetration depth was negatively correlated with preservative concentration.With an identical concentration,no significant differences in penetration were found among the longitudinal,radial and tangential directions.Compared with the atmospheric pressure,the penetrations of poplar in longitudinal,radial and tangential directions were significantly increased when the treatments were carried out under the pressure of 0.6 MPa.