Ultra-thin freestanding graphene films for efficient thermal insulation and electromagnetic interference shielding
Peng Zhang, Zhi Cao, Chunle Liu, Pengni Li, Hui Kong, Ting Li, Xiaomin Luo, Jianyan Feng, Kaiyun Yuan, Ruqing Xu
Abstract
. The mechanism for the improvement of electromagnetic shielding performance is that (1) microwave reduction effectively enhances the conductivity of the graphene sheet overlapping network; (2) the gas generated by the instantaneous high temperature causes a large number of void structures between the graphene layers, and the irregular interlayer stacking structure makes the reflective surface more disordered, thereby prolonging the reflection path of electromagnetic waves among layers. In summary, this simple and environmentally friendly preparation strategy has good practical application prospects for graphene film products in flexible wearables, intelligent electronic devices, and electromagnetic wave protection.