Evaluation of the Dimensional Stability and Leaching Performance of ACQ/Wax Treated Southern Pine

Lili Yu, Zhenzhong Tang, Danwei Wei, Lizhi Zhu, Junyan Zhu, Xiaojun Ma

Abstract


Southern pine (Pinus sp.) wood cubes were treated with ACQ solutions with wax modification and post-treated at 70 °C for 10 h with hot air circulation. The effects of wax concentrations in ACQ-treated southern pine on its dimensional stability and copper leaching performance were investigated. The ACQ/wax-treated wood exhibited improved water resistance during the water soak process. The testing of swelling and shrinkage performance of the treated wood showed that samples with a higher percentage of wax had higher resistance to water swelling and shrinkage. The samples with a lower percentage of wax addition had only a slight effect on the moisture swelling and shrinkage resistance. As a result, copper leaching from ACQ/wax-treated wood with a 2% wax concentration was reduced to a lower level compared to ACQ-treated wood. When the proportion of wax in ACQ preservative was less than 1%, a higher percentage of copper was leached from treated wood.

Keywords


Amine copper quaternary (ACQ); Wax; Dimensional stability; Copper leaching

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