Multifunctional biocarbon/cellulose composites: Synchronizing superior EMI shielding, flame Retardancy and biofertilization via cradle-to-cradle strategy.

Current shielding technologies predominantly focus on performance optimization while neglecting fire safety considerations especially in construction building. To address the vulnerability of electromagnetic interference (EMI) shielding materials to accidental fires, we develop sustainable biocarbon/cellulose composites with integrated EMI shielding and flame-retardant capabilities. This approach employs porous biocarbon particles as functional units combined with three-dimensional cellulose networks through hydrogen bonding, van der Waals forces, and physical entanglements.

Core-shell structured waste paper/biocarbon composite providing exceptional electromagnetic interference shielding and flame retardancy.

The widespread use of electronic devices significantly facilitates daily human life, but also leads to increasingly serious electromagnetic pollution. Therefore, it is necessary to develop eco-friendly electromagnetic interference (EMI) shielding materials with excellent overall performance. Here, we prepare a waste paper/biocarbon (WP/BC) composite with a distinct densely self-bonded core-shell structure through the partial dissolution co-mixing process.