Develop a viable alternative to the current solvent-based preservative systems used to treat millwork. This research will:
- Evaluate the supercritical CO2 (ScCO2) preservative treatment process as an environmentally friendly, non-swelling, solvent-free, treatment process for Canadian wood species;
- Expand the use of wood species such as Alpine fir (Abies lasiocarpa), balsam fir (Abies balsamea), black spruce (Picea mariana), and white spruce (Picea glauca) for residential treated lumber;
- Facilitate the use of jack pine (Pinus banksiana) and lodgepole pine (Pinus contorta) heartwood as value-added wood products;
- Eliminate the need for the value-added industry to use volatile organic solvent-based preservatives to treat millwork and window frames;
- Eliminate the need for pre-treatment processes such as incising for residential treated lumber that degrade the appearance of wood;
- Enhance the durability of wood using environmentally friendly preservatives and treatment technology.