Effects of wood preservatives in adhesive curing and changes in surface characteristics of treated wood

The effects of various wood preservative systems and treatment processes on mechanical and physical properties of wood material have been well documented. Particularly, bondability and wettability properties of wood surfaces are directly affected from surface energy and roughness. In this article, changes of surface energy components of preservative treated wood surfaces have been investigated. Preservative chemicals play important role on post-treatment surface energy values which depend on wood species, preservative type and retention value. The effects of wood preservative chemical presence on curing studies are also discussed through the Differential scanning calorimeter (DSC) and Infrared spectrometer (IR) techniques. Current literature was scanned for compatible adhesive preservative combinations. The compatibility was examined under the cyclic delamination tests for various adhesive systems against wood preservatives commonly in use. In addition, the development processes of some coupling agents to improve bondability of preservative treated wood were discussed. Furthermore, long-term durability issues of preservative treated and bonded glue lines were evaluated through changes in moisture content, alteration of pH and inhibition of condensation reaction. Finally, the surface energy values of some wood species treated with common wood preservative chemicals are also listed. The information may be useful to solve problems in treated wood bonding area as well as developing new chemical adhesive formulations for chemically and physically modified wood surfaces.