Sustainable production of in-situ CO2 capture and mineralization of multifunctional nanowood with excellent anisotropic, flame retardant, and durability for building construction

Timber is among the oldest building materials used by humans but natural wood had many disadvantages such as flammability and poor thermal insulation. These properties may affect the safety and durability of buildings continuous timber. There has been a growing interest in developing practical and simple methods for the fabrication of high-performance wood. A cost-efficient and easily scalable approach for the fabrication of nanostructured multifunctional wood with excellent anisotropic, flame retardant, and durability properties has been developed via in-situ CO 2 capture and mineralization. The product has high mineralization rate (39 %), higher strength (45.4 MPa), low thermal conductivity (∼0.13 W/m·K), and a low LOI (39.3 %). Deposition of CaCO 3 in the nano and micro-porous structures of wood not only enhances its insulation against heat but also its ability to resist flames, which is an important performance parameter for applications in building construction. At the same time, the mineralized wood displays excellent durability properties. It is resistant to high temperatures, extreme cold, and prolonged immersion in water. Therefore, in-situ CO 2 capture and mineralization of the wood nano and micro-porous architecture with CaCO 3 may provide a cost-efficient and scalable strategy to fabricate nanostructured multifunctional wood for potential materials in modern buildings.