Assessing the Conformity of Mycelium Biocomposites for Ecological Insulation Solutions

Area of Science:

• Materials Science
• Biotechnology
• Sustainable Engineering

Background:

• Traditional building materials often rely on petroleum-based resources, contributing to environmental concerns.
• There is a growing demand for sustainable and eco-friendly alternatives in the construction industry.
• Mycelium biocomposites (MBs) present a promising biodegradable option derived from fungal networks.

Purpose of the Study:

• To develop and characterize mycelium biocomposites (MBs) using diverse agricultural, wood, and paper industry waste streams.
• To evaluate the physicomechanical properties, thermal conductivity, and fire behavior of the developed MBs.
• To assess the potential of MBs as a sustainable substitute for conventional building materials.

Main Methods:

• Formulation of MBs using various combinations of agricultural waste, wood processing byproducts (e.g., birch sanding dust), and paper industry waste.
• Experimental testing of mechanical properties, including bending strength.
• Measurement of thermal conductivity (lambda coefficient) and fire performance (peak heat release rate, total smoke release, total heat release).

Main Results:

• Composites with waste fibers and birch sanding dust exhibited the highest bending strength, comparable to synthetic polymers like EPS and XPS.
• Hemp-based MBs displayed the lowest thermal conductivity (40 m·W·m^-1·K^-1), rivaling non-mycelium insulation materials.
• MBs demonstrated enhanced fire resistance, with lower heat release and smoke production compared to synthetic polymers and some wood composites.

Conclusions:

• Mycelium biocomposites show significant potential as sustainable alternatives in the building industry.
• The developed MBs offer a competitive balance of mechanical strength, thermal insulation, and fire safety.
• Utilizing waste streams for MB production aligns with circular economy principles and reduces reliance on fossil fuels.