摘要
随着信息时代的到来,电磁波在生活中无处不在,在给人们生活带来便利的同时,对人体健康的威胁也不容忽视,吸波织物可作为人类的保护衣,使其免受电磁波的危害。铁磁材料是一种以磁滞损耗、涡流损耗等磁损耗为主,同时兼具部分介电损耗能力的吸波材料,具有吸收强度高、吸收频带宽的优点。然而其抗氧化性与酸碱性差、密度大、匹配厚度大、温度稳定性差,但可通过用其他材料包覆铁磁材料形成壳核结构,这样不仅提高了其抗氧化和耐腐蚀能力,而且壳核之间形成界面极化使吸波性能提高。石墨烯自面世以来受到了广大学者的关注,其比表面积大、表面原子比例高、悬挂键多,可通过界面极化和多重散射吸收电磁波,但正因为比表面积和分子间作用力过大,导致与其他物质复合时易团聚,限制了其应用。可用Hummers法制备氧化石墨烯,再用还原剂还原,得到有较多结构缺陷及含氧官能团残留、溶解性和分散性好的还原氧化石墨烯。将铁磁材料和石墨烯复合负载到织物上,可制备出双损耗、吸收频带宽的吸波涂层织物。大多数研究者将吸波材料的种类作为研究重点,而忽略了吸波涂层对吸波效果的影响。如可利用铁磁材料的磁性和易腐蚀性质,对涂层进行粗糙度处理,增强多重反射或形成活性位点,使涂层织物吸波性能得到进一步提高。本文针对铁磁材料/石墨烯复合吸波涂层织物的研究现状,简述了铁磁材料和石墨烯的结构及吸波原理,重点阐述了铁磁材料和石墨烯吸波涂层负载到织物上的方法和研究进展,最后总结了吸波涂层优化方法。
With the arrival of the information age, electromagnetic(EM) wave has been everywhere in our life. While it bringing convenience to people’slives, the threat to human health cannot be ignored. EM wave absorbing fabric can be used to make protective clothing for human beings to protect them from the harm of EM waves. Ferromagnetic materials are a kind of absorbing materials with magnetic loss(hysteresis loss, eddy current loss), and partial dielectric loss,which have the advantages of high absorption strength and wide absorption band. However, it has poor oxidation resistance and acid-base property, high density, large matching thickness, and poor temperature stability. By coating ferromagnetic materials with other functional materials to form a shell core structure, the oxidation resistance and corrosion resistance can be improved, the interfacial polarization between the shell cores can improve the wave absorption performance as well. Graphene has attracted the attention of scholars since its appearance. It has a huge specific surface area, a high proportion of atoms on the surface, and plenty of hanging bonds, it can absorb electromagnetic waves through interfacial polarization and multiple scattering. However, due to its excessive specific surface area and intermolecular forces, it is easy to agglomerate with other substances when recombined, which limits its application. Reduced graphene oxide is usually prepared by the Hummers method and then reduced by reducing agents, which have some structural defects and oxygen-containing functional group residues, solubility and dispersibility.The two excellent materials, ferromagnetic material and graphene, can be used to fabricate the absorbent coated fabric with double loss and a wide absorption band. Most researchers focus on the types of absorbing materials but ignore the effect of absorbing coating on absorbing effect.The magnetic and corrosivity properties of ferromagnetic materials can be used to treat the coating with roughness to enhance multiple reflections
作者
王翊
郭顺德
刘元军
赵晓明
WANG Yi;GUO Shunde;LIU Yuanjun;ZHAO Xiaoming(School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China;School of Art and Costume,Tiangong University,Tianjin 300387,China;Tianjin Key Laboratory of Advanced Textile Composites,Tiangong University,Tianjin 300387,China;Tianjin Key Laboratory of Advanced Fiber and Energy Storage Technology,Tianjin 300387,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2021年第17期17178-17184,共7页
Materials Reports
基金
中国博士后科学基金项目(2019TQ0181,2019M661030)。
关键词
铁磁材料
石墨烯
织物
吸波涂层
ferromagnetic material
graphene
fabric
absorbing coatings
