Exploring the Sustainable Development Strategy of Wood Flour-Based Composite Materials in Outdoor Furniture

Wood flour, a landscaping byproduct, poses disposal challenges due to its poor degradability, despite its potential as a sustainable material. This study modified wood powder by synergistically incorporating fly ash and TiO 2 , followed by curing it with polyamide and epoxy resin to produce high-performance wood powder-based composites suitable for outdoor furniture applications, it can solve the environmental problems caused by fly ash. The research findings indicated that as the TiO 2 content increased, the material’s pore size diminished, structural strength improved, and it demonstrated enhanced hydrophobic properties and UV absorption capabilities. The optimal UV absorption performance was observed at a TiO 2 content of 1.5%. The combination of TiO 2 and fly ash led to the formation of more stable Si-O-Ti and Si-O-Si bonds, which further strengthened the material. Water contact angle and water repellency tests indicated that the 1.5% TiO 2 composite showed a 12% increase in compressive strength and a water contact angle of 100.6°, indicating improved hydrophobicity. The addition of TiO 2 reduced the number of free-OH groups within the matrix, thereby improving the composite’s hydrophobicity. Outdoor chairs fabricated by mixing 1.5% TiO 2 -modified wood powder with PET for demolding exhibited excellent structural stability while also being safe and environmentally friendly. This study proposes a feasible preparation strategy for wood powder, enhancing durability through improved mechanical strength, water repellency, and UV shielding. Furthermore, it offers valuable insights into the material modification of wood powder-based materials for the production of outdoor garden furniture.