Why in the News?

A promising eco-friendly alternative gaining attention is mycelium bricks—a biodegradable, lightweight, and fire-resistant material derived from fungal filaments.

What Are Mycelium Bricks?

• Mycelium is a network of thin fungal strands called hyphae that function similarly to plant roots.
  • It grows in soil or other substrates, secreting digestive enzymes to break down organic material, providing nutrients to the fungi, plant partners, and other organisms.
• Mycelium bricks are made by combining sawdust, husk, and fungal spores, which then solidify into a lightweight, insulating material over a few days.
• They are biodegradable, fire-resistant, and offer thermal insulation, making them a potential green alternative to conventional bricks.

Advantages of Mycelium Bricks

• Lower Carbon Footprint: Mycelium bricks don’t require high-temperature kilns, significantly reducing CO₂ emissions.
• Lightweight: Easier to transport and handle, reducing logistics-related emissions.
• Good Thermal Insulation: Helps regulate indoor temperatures, reducing energy consumption in buildings.
• Biodegradability: Mycelium naturally decomposes, making it a zero-waste material.
• Versatile Applications: Potential use in interior panelling, circuit boards, liquid filters, and sports equipment.

Challenges Limiting Large-Scale Adoption

• Lower Load-Bearing Strength: Mycelium composites have a high strength-to-weight ratio, but they are 100 times weaker than concrete.
• Susceptibility to Moisture:  Mycelium is highly absorbent, making it prone to fungal decay and moisture damage in humid environments.
• Shorter Lifespan: Unlike conventional bricks, mycelium biodegrades within a few years, raising concerns about long-term durability.

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