A novel in-situ growth ZIF-67 on biological porous carbon encapsulated phase change composites with electromagnetic interference shielding and multifunctional energy conversion

With the current intricate application environment, extended versatility is critical to the future development of phase change materials (PCMs). Herein, we prepared a series of phase change composites (PCCs) with excellent electromagnetic interference shielding effectiveness (EMI SE) and versatile thermal management. Specifically, the hybridized multi-stage porous biological carbon base with magnetic and electrical conductivity was prepared as the substrate material for encapsulating paraffin wax (PW) by carbonizing in situ growth ZIF-67 on waste agricultural. The synergy between the functions of the porous biological carbon and PW makes the PCCs have high-performance EMI SE (44.81 dB) and high enthalpy value (175.88–229.52 J/g) at the identical time. In which CC-ZIF-3 @PW has outstanding effect in storing and releasing thermal energy for photo-thermal, magnetic-thermal and electric-thermal conversion. Unsurprisingly, the PCCs breaks innovative ground for energy storage and conversion materials with potential value in various fields such as electronic protection, deicing and thermal energy utilization.