Bio-composites based on fungal mycelium and beech particles impregnated with BPCM (bio-phase change material) for thermal energy storage

The building sector is a major contributor to Europe's carbon emissions, and transition to a bio-based economy is essential for achieving long-term sustainability goals. The European Union has set ambitious targets for climate-neutral heating and cooling by 2050, which requires the widespread adoption of energy-efficient and environmentally friendly technologies. A key element in this transition is the integration of fully bio-based materials in construction. While the use of solid wood in building design has made significant progress, there remain substantial opportunities to harness the potential of bio-based materials, especially those that improve thermal performance while minimising environmental impacts. This research focuses on the development of innovative bio-composite materials that incorporate bio-based phase change materials (bioPCMs) with lignocellulosic (wood) particles bound by fungal mycelia. By exploring the potential of bio-based materials with thermal energy storage capabilities, the study aims to demonstrate how these materials can replace traditional building materials with a high environmental footprint. Specifically, the paper investigates bio-based phase change material derived from renewable sources, which are integrated into bio-composites made from beech particles. The thermal properties of these materials are evaluated to assess their potential for use in sustainable building practices. This study highlights the feasibility of using bio-based materials not only as structural components but also as functional elements that contribute to thermal regulation in buildings. The results show that bio-composites with integrated bioPCM could serve as viable alternatives to conventional materials, offering both environmental and functional benefits in the pursuit of sustainable, climate-neutral building solutions. Keywords: agroforestry chain, bio-materials, biological phase change material, lignocellulosic waste, mycelium, wood particles