Flexible rGO/Fe3O4 NPs/polyurethane film with excellent electromagnetic properties

作     者：Wei-Qi Yu Yi-Chen Qiu Hong-Jun Xiao Hai-Tao Yang Ge-Ming Wang 余维琪;邱怡宸;肖红君;杨海涛;王戈明

作者机构：School of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205China National Center for Nanoscience and TechnologyBeijing 100190China Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China Fujian Institute of InnovationChinese Academy of SciencesFozhou 350108China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2019年第28卷第10期

页      面：556-561页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11274370,51471185,and 11704288) the National Key Research and Development Program of China(Grant Nos.2016YFJC020013 and 2018FYA0305800) 

主　　题：graphene oxide magnetic nanoparticles flexible film electromagnetic properties 

摘      要：Large-area and flexible reduced graphene oxide(rGO)/Fe3O4 NPs/polyurethane(PU) composite films are fabricated by a facile solution-processable method. The monolayer assembly of Fe3O4 nanoparticles with a high particle-stacking density on the graphene oxide(GO) sheets is achieved by mixing two immiscible solutions of Fe3O4 nanoparticles in hexane and GO in dimethylformide(DMF) by a mild sonication. The x-ray diffraction and Raman spectrum confirm the reduced process of rGO by a simple thermal treatment. The permittivity value of the composite in a frequency range of 0.1 GHz-18 GHz increases with annealing temperature of GO increasing. For 5-wt% rGO/Fe3O4 NPs/PU, the maximum refection loss(RL) of over-35 dB appears at 4.5 GHz when the thickness of film increases to 5 mm. The rGO/Fe3O4 NPs/PU film, exhibiting good electromagnetic properties over GHz frequency range, could be a potential candidate as one of microwave absorption materials in flexible electronic devices.