Investigation of hardwood biochar as a replacement for wood flour in wood–polypropylene composites

The overall goal of this project was to combine biochar (BC) with plastic and wood residue to create novel composite products. Little to no research has been conducted on combining BC with other materials to form a composite. In this research, BC was used as a partial and full replacement material for wood flour and was combined with polypropylene to manufacture composite materials. The resulting wood/BC/plastic composites were evaluated for various mechanical and physical properties. The composites fabricated with 25% BC had the highest average flexural strength and modulus of elasticity. Composites fabricated with 5% BC had the highest average tensile strength and tensile elasticity. Composites fabricated with 40% BC had the lowest average 24- and 48-h water absorption percentage. The findings suggested that BC has the potential to be a replacement for traditional wood in a variety of composite applications.