Wood Flour Pretreatment and Toughening Agents in FDM 3D-Printed PLA Biocomposites
Abstract
Investigation of wood flour surface treatments and toughening agents on FDM 3D-printed PLA biocomposites. Wood flour was treated with silane coupling agents (KH550) and acetic anhydride, examining effects on mechanical, thermal, and water absorption properties. KH550-modified wood flour/PLA showed greater tensile strength and impact resistance, while acetic anhydride treatment improved flexural properties. The addition of cellulose nanofibers (CNFs) can improve tensile strength and modulus by 84% and 63% respectively at just 1 wt% loading.
Questions this source addresses
- How does silane coupling agent (KH550) treatment of wood flour compare to acetic anhydride treatment in their effects on the mechanical properties of FDM-printed PLA biocomposites?
- What improvement in tensile strength and modulus does adding cellulose nanofibers at just 1 wt% loading provide to wood flour/PLA composites?
- What practical processing considerations, such as particle size and print speed, affect the quality of FDM-printed wood-PLA filaments?
- Why do surface treatments like silane coupling and acetic anhydride improve water resistance in wood flour/PLA biocomposites?