MXenes have emerged as highly promising candidates for electromagnetic interference (EMI) shielding. However, achieving strong interfacial adhesion of MXene nanosheets within substrate materials without applying adhesives remains challenging. To address the demand for functional coatings with integrated wear resistance, we fabricated a regenerated wood-MXene (RW-M) by creating a dense, three-dimensional (3D) nanocellulose network from partially dissolved wood surface cellulose to anchor MXene nanosheets. The ingenious structural design strategy via in-situ dissolved and regenerated of delignified wood surface cellulose constructs a cross-linked nanocellulose network, providing rich hydrogen binding sites for functional MXene nanosheets. After densification, the MXene nanosheets bond tightly with the delignified wood surface, significantly enhancing the mechanical stability. The composite achieves an exceptional EMI shielding effectiveness (SE) of 45 dB in the X-band (8.2–12.4 GHz) at a thin thickness of 0.35 mm, and maintains a stable SE of 39–41 dB after 1000 abrasion cycles, which is attributed to the robust interfacial bonding and mechanical interlocking. Moreover, the RW-M also exhibits outstanding Joule heating performance, reaching 115 °C with 5 V of applied voltage. This work provides a green strategy for designing EMI shielding materials, showing great potential for applications in decoration, building, and advanced thermal management systems.

Using biodegradable material derived from renewable resources as petroleum-based plastics replacement is a promising way towards sustainable development. However, the insufficient mechanical properties and complex manufacturing process of bioplastics still need to be improved for high-quality food packages. Herein, we report a top-down strategy to transform natural wood into a clear wood packaging film through scalable delignification and polyvinyl alcohol (PVA) infiltration. The wood packaging film demonstrates a laminated structure with completely collapsed cell walls and PVA intertwined together after energy-saving air drying, resulting in high light transmittance with low haze, good mechanical performance, and high barrier performance for oxygen and water vapor. Molecular dynamics simulations reveal the underlying fracture mechanism between cellulose and PVA, which effectively enhances the Young’s modulus and strength of the wood packaging film. These findings contribute to the development of biodegradable and strong packaging materials, as well as other food-related applications, using sustainable wood.