Thermosetting composite material and associated printing method

A thermosetting composite material for 3D printing comprising:

• a furan copolymer or homopolymer, formed from furfuryl alcohol monomer or its derivatives, and forming a thermosetting matrix of the composite material, and
• a non-miscible material with the thermosetting matrix,
• wherein that the thermosetting composite material further comprises a solvent, and in that the non-miscible material with the thermosetting matrix is formed of particles chosen from among:
• micrometric particles, at least 50% of the micrometric particles having at least one dimension of between 1 and 100 m,
• nanometric particles, at least 50% of the nanometric particles having at least one dimension of between 1 and 100 nm, and
• a mixture of said micrometric particles and nanometric particles,
• the particles being with the basis of a compound comprising more than 40% by mass of carbon, and are chosen from among graphite, carbon black, graphene particles, carbon nanotubes and carbon nanofibres, a micrometric cellulose powder, nanocellulose, and particles with the basis of one from among sawdust and fruit pips or shells,
• when the particles are chosen from among graphite, carbon black, graphene particles, carbon nanotubes or carbon nanofibres, the proportion of particles in the thermosetting composite material is of between 10% and 70% with respect to the total mass of the composite material,
• when the particles are chosen from among a micrometric cellulose powder and nanocellulose, the proportion of particles in the thermosetting composite material is of between 15% and 40% by mass, with respect to the total mass of the composite material,
• when the particles are with the basis of one from among sawdust, fruit pips and shells, the proportion of particles in the thermosetting composite material is of between 10% and 80% by mass, with respect to the total mass of the composite material.