介电型石墨烯吸波复合材料研究进展

Research progress in dielectric graphene microwave absorbing composites

石墨烯因其独特的介电特性、高比表面积、低密度等性质,被认为是新一代吸波材料的有力候选。然而,单一组分的石墨烯吸波性能不佳,因此近年来石墨烯基吸波复合材料成为研究热点。本文介绍石墨烯及其复合材料的吸波机理与特性,指出介电型石墨烯作为极具发展潜力的吸波复合材料具有轻质、高强、宽频、薄层的特点。从石墨烯基体与掺杂体两方面综述了介电型石墨烯吸波复合材料的研究进展。最后指出,开发损耗能力强的新型介电掺杂体、构筑多组分吸波复合材料体系、建立通用的设计方法以及探索大批量的制备方法是未来的研究方向。

Graphene is widely considered a promising candidate for microwave absorbing materials in the future due to its unique dielectric properties,high specific surface area,low density and other outstanding properties.However,the single component graphene has poor microwave absorbing properties,so graphene-based microwave absorbing composites have become a research hotspot in recent years.In this paper,microwave absorbing mechanism and characteristics of graphene and its composites were introduced.Accordingly,it indicates that dielectric graphene microwave absorbing composites have the potential to become lightweight,high-intensity,broadband,and thin-layer microwave absorbing materials.The research progress in dielectric graphene microwave absorbing composites was reviewed from two aspects of graphene matrix and dopant.Finally,it was pointed out that developing new dielectric dopants with strong loss ability,constructing microwave absorbing composites with multiple components,establishing common design methods,as well as exploring large scale preparation methods would become the research trends in the future.