新型二维材料Ti_(2)CT_(x)MXene的性能、制备及其在电磁屏蔽和微波吸收领域的研究进展

Performance,preparation and research progress of a new two-dimensional material Ti_(2)CT_(x)MXene in the field of electromagnetic shielding and microwave absorption

随着5G时代的到来,电磁干扰问题日益严重,对电磁屏蔽材料提出了更高的要求,需要制造屏蔽效率更高、覆盖范围更广、轻便且性能稳定的材料。MXene是具有类石墨烯结构的材料,由于其独特的性能,在储能、吸附、催化、光电转换、传感器和电磁屏蔽等方面极具研究价值。尤其是MXene材料具有的高导电性(可高达2×10^(4)S/cm)和层状结构,使其成为极具潜质的电磁屏蔽候选材料。研究表明Ti_(2)CT_(x)具有较低的密度,为实现电磁屏蔽材料的轻量化提供了方向。可将Ti_(2)CT_(x)与导电材料、磁性材料等复合,优化复合材料的结构和性能,实现更广泛的应用。本文综述了Ti_(2)CT_(x)MXene的结构和物理性能,并综合分析了Ti_(2)CT_(x)不同制备方法的优缺点。另外,重点介绍了Ti_(2)CT_(x)作为电磁干扰屏蔽材料和微波吸收材料的最新研究进展,分析了Ti_(2)CT_(x)材料在制备、电磁屏蔽性能及应用中存在的主要问题,展望了Ti_(2)CT_(x)材料在电磁屏蔽和吸波领域的发展趋势。

With the advent of 5G era,the problem of electromagnetic interference is becoming more and more serious,which puts forward higher requirements for electromagnetic shielding materials.It is necessary to manufacture materials with higher shielding efficiency,wider coverage,lighter weight and stable performance.MXene is a material with graphene-like structure.Because of its unique properties,it has great research interests in energy storage,adsorption,catalysis,photoelectric conversion,sensors and electromagnetic shielding.In particular,MXene materials have high conductivity(up to 2×10^(4)S/cm)and layered structure,making it a potential candidate material for electromagnetic shielding.The research shows that Ti_(2)CT_(x) has a low density,which provides a direction for realizing the lightweight of electromagnetic shielding materials.Ti_(2)CT_(x) can be compounded with conductive materials,magnetic materials,etc.to optimize the structure and properties of the composites and achieve a wider range of applications.This paper reviews the structure and physical properties of Ti_(2)CT_(x)MXene,and comprehensively analyzes the advantages and disadvantages of different preparation methods of Ti_(2)CT_(x).In addition,the latest research progress of Ti_(2)CT_(x)as electromagnetic interference shielding material and microwave absorbing material is emphatically introduced,the main problems existing in the preparation,electromagnetic shielding performance and application of Ti_(2)CT_(x)material are analyzed,and the development trend of Ti_(2)CT_(x)material in the field of electromagnetic shielding and microwave absorption is prospected.