还原程度对石墨烯复合材料吸波性能影响  

EFFECT OF REDUCTION DEGREE ON MICROWAVE ABSORPTION PROPERTIES OF GRAPHENE COMPOSITES

作　　者：邹毅 王钧[1] 田旭军[2] ZOU Yi;WANG Jun;TIAN Xu-jun(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;China Ship Development and Design Center,Wuhan 430064,China)

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070 [2]中国舰船研究设计中心,武汉430064

出　　处：《复合材料科学与工程》2020年第1期47-51,共5页Composites Science and Engineering

基　　金：国家自然科学基金资助项目(51672201)

摘　　要：还原石墨烯(RGO)是一种高效的电磁波吸收材料,其缺陷相关的介电损耗机制是当前研究的热点。本文在密闭氧化法制备氧化石墨烯(GO)的基础上,通过调节VC的用量制备了还原度可控的RGO。结果表明:RGO的还原度随着VC用量的增加而提高,且电导率与还原程度正相关;在1 GHz^18 GHz内,高度还原的RGO具有更好的吸波效果,当其在树脂基体中添加量仅为1.5wt%时,3 mm的吸波体在9.5 GHz具有最强吸收峰值-16.4 dB。本文探讨了RGO缺陷相关的介电弛豫机理,为新型的石墨烯基复合吸波体的研究和应用提供了实验依据。Reduced Graphene Oxide(RGO)is considered to be the most promising candidate for high-efficiencyelectromagnetic wave absorption materials.The dielectric loss mechanism associated with its defects is a hot topic in current research.Graphene Oxide(GO)was prepared by closed oxidation method,and RGO with controllable reduction degree was prepared by VC reduction.The results show that the reduction degree of RGO increases with the increase of the amount of VC and the conductivity is positively correlated with it.Highly reduction degree RGO has better absorbing property in 1 GHz^18 GHz.When the addition amount of RGO is only 1.5wt%in the resin matrix,the absorber with 3 mm thickness has the strongest absorption peak of-16.4 dB at 9.5 GHz.This work reveals the dielectric relaxation mechanism related to RGO defects,and provides an understanding for the research and application of novel graphene-based composite absorbers.

关 键 词：石墨烯 还原程度 维生素C 吸波材料 

分 类 号：TB332[一般工业技术—材料科学与工程]