Binderless bio-based composites obtained by thermo-compression of walnut shells powder

This study investigated the potential of dry processing methods to manufacture bio-based materials with reduced environmental impacts, which is in alignment with the energetic and ecological transitions global strategies. The increasing demand for eco-friendly materials drives research into bio-based composites. The mechanical properties were evaluated for binderless composites made from walnut shells, which are industrial bio-based by-products. Thermocompression moulding was used to fabricate the composites. Their mechanical behaviour and their resistance to water were tested. The composites showed a flexural strength of 16.9 MPa and a Young’s modulus of 4.3 GPa. These findings suggest that walnut shell-based composites are viable alternatives for sustainable materials.