Sandwich-structured MXene/PVA/ BaSO4@n-eicosane composite with thermal management and radiation protection

Prominent thermal management, electromagnetic interference(EMI) shielding, and anti-ionizing radiation capabilities are essential trends in developing flexible materials. In this study, we developed a novel flexible MXene/polyvinyl alcohol/ microencapsulated phase change material (MPM) phase change composite film with a sandwich structure using an alternating vacuum filtration method. This film demonstrates good toughness, strength, stability, and durability. Incorporating microencapsulated phase change material(MEPCMs) enhances the enthalpy of the films (110.2J/g). Additionally, due to the incorporation of phase change microcapsules with a unique barium sulfate-based (BaSO 4 ) as the wall material, the films not only possess EMI shielding performance(39.7 dB), but also exhibits resistance to ionizing radiation(4.62 cm 2 g −1 ). Notably, the film can convert light and electrical energy into heat and store this heat as latent heat within the MEPCMs, enabling multi-source thermal management capability. The ease of preparation and exceptional performance of MPM make it highly suitable for a wide range of industrial and wearable applications.