Structure Formation in Engineered Wood Using Wood Waste and Biopolyurethane

Area of Science:

• Materials Science
• Sustainable Engineering
• Wood Science

Background:

• Wood waste presents a significant disposal challenge.
• Engineered wood products offer sustainable alternatives to traditional timber.
• Developing high-strength wood composites from waste is crucial for construction.

Purpose of the Study:

• To investigate processing methods for reusing wood waste in engineered wood logs.
• To assess if these logs meet structural timber strength requirements.
• To evaluate the impact of chemical treatments on wood waste properties and adhesive bonding.

Main Methods:

• Characterization of three wood waste types (packaging, construction/furniture, door manufacturing).
• Analysis of particle size, shape, and surface microstructure.
• Binding wood particles with biopolyurethane adhesive and evaluating adhesion.
• Chemical treatment of wood particles (sodium carbonate, calcium hypochlorite, peroxide).
• Tensile and compressive strength testing of engineered wood logs.

Main Results:

• Chemical treatments reduced filler weight by up to 30%.
• Tensile strength of engineered wood from packaging waste treated with sodium carbonate increased from 8331 to 12,702 kPa.
• Treatments influenced tensile strength variably based on the chemical solution used.
• Compressive strength was determined to assess overall structural integrity.

Conclusions:

• Wood waste can be effectively processed into engineered wood logs for construction.
• Chemical surface treatments enhance the bonding of wood waste particles with biopolyurethane adhesive.
• Optimized treatments can significantly improve the mechanical properties, meeting structural timber standards.