Advancing mycelium-based composites: Integrating strength optimization and porosity control for alternative construction materials
Annotatsiya
Mycelium-based composites (MBCs) provide a sustainable alternative to fossil-based materials, combining lignocellulosic substrates and fungal mycelium to form lightweight structures. While their thermal properties are well-studied, mechanical performance remains underexplored. This study aims to enhance MBC compressive strength (σC) and elasticity (E) by minimizing porosity (ϕ) and refining fabrication techniques. A novel methodology integrates gas pycnometry for non-destructive porosity (ϕ) analysis and uniaxial compression tests to assess mechanical properties. Using Ganoderma lucidum and various wood substrates, the study explores incubation periods, particle sizes, and wood-to-wheat bran ratios. Results show denser composites improve σC and E, with beech-based MBCs performing best. Surprisingly, poplar-based composites maintain integrity due to a mycelial “jacketing” effect. Sawdust substrates outperform wood chips, emphasizing substrate refinement’s role. This research advances MBC optimization, offering eco-friendly construction alternatives. Future studies should explore scalability and refine fungal strains for improved mechanical properties.