Mechanical Properties of Dense Mycelium-Bound Composites Under Accelerated Tropical Weathering Conditions
- Author: mycolabadmin
- 2021-11-11
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Summary
This research explores using mushroom roots (mycelium) combined with agricultural waste to create sustainable building materials that could replace traditional wood particleboard. The material is made by growing mushroom roots through a mixture of sawdust and palm oil waste products, creating a natural binding effect without toxic chemicals. While promising, the material needs further development to better withstand humid tropical conditions.
Impacts on everyday life:
– Provides an eco-friendly alternative to toxic formaldehyde-containing building materials
– Helps reduce waste by repurposing agricultural byproducts into useful materials
– Could lower construction costs through use of readily available waste materials
– Improves indoor air quality by eliminating harmful chemical emissions
– Advances development of sustainable building materials for tropical climates
Background
Particleboards are commonly used engineered wood products in construction and furniture that rely on wood shavings bound with urea-formaldehyde adhesives. However, these materials have environmental impacts due to deforestation and toxic formaldehyde emissions. There is a need for sustainable alternatives that avoid harmful chemicals and make better use of waste materials.
Objective
To evaluate the mechanical properties and weathering resistance of dense mycelium-bound composites (DMCs) made from Ganoderma lucidum mycelium grown on sawdust and empty fruit bunch substrates as a potential environmentally-friendly alternative to traditional particleboards.
Results
After 35 days of weathering exposure, uncoated samples showed significant decreases in mechanical properties: flexural strength decreased by 59%, compressive strength by 84%, and tensile strength by 79.4%. Coated samples showed better resistance, with smaller decreases of 36%, 34.2%, and 47.1% respectively. The protective coating had a statistically significant effect only on preserving tensile strength. SEM revealed inconsistent surface porosity which likely affected coating effectiveness.
Conclusion
Dense mycelium-bound composites show potential as an environmentally friendly alternative to particleboards, though their mechanical properties degrade significantly under tropical weathering conditions. Protective coatings can help preserve strength, but improvements in material consistency and processing are needed to enhance weathering resistance. Increasing pressing temperature above 160°C may improve strength through better lignin cross-linking, though effects on mycelium bonding require further study.
- Published in:Scientific Reports,
- Study Type:Experimental Research,
- Source: 10.1038/s41598-021-01598-4