Growing biodegradable thermal insulation from agricultural husks and fungal roots.
AExpanded polystyrene foam cushions fragile electronics effectively, yet persists in landfills for centuries and resists economical recycling. Seeking circular alternatives, materials engineers are cultivating mycelium—the branching underground root network of fungi—inside custom moulds filled with rice hulls or hemp hurds.
BOver five days in dark humidity chambers, fungal hyphae secrete enzymes that bind loose agricultural fibres into a rigid, lightweight matrix. Gentle oven baking then neutralises biological growth, yielding a shock-absorbent block that composts cleanly in garden soil within six weeks.
CWhile furniture and wine shippers have adopted mycelium corners commercially, scaling production for moisture-exposed cold-chain freight requires thin hydrophobic plant-wax coatings so condensation does not soften the composite during humid sea transit.
Write ONE NUMBER ONLY: Moulded mycelium blocks decompose in soil within _______ weeks.
Write TWO WORDS: What natural finish protects mycelium composites from humidity during sea transit?