Poly(Vinylidene Fluoride)/Cu@Ni Anchored Reduced-graphene Oxide Composite Films with Folding Movement to Boost Microwave Absorption Properties

Biao Zhao1,2,#

Luyang Liang3,#

Zhongyi Bai1

Xiaoqin Guo1

Rui Zhang1,3

Qinglong Jiang4,*,Email

Zhanhu Guo5,*,Email

Henan Key Laboratory of Aeronautical Materials and Application Technology, School of Material Science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou, Henan, 450046, China

2 Department of Mechanical and Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, M5S 3G8, Canada

3 National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Materials Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou, 450002, China

Department of Chemistry and Physics, University of Arkansas, Pine Bluff, Arkansas, 71601, USA

Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN, 37996, USA

# These authors contributed equally to this paper.

Abstract

The influence of reduced graphene oxide (rGO)/Cu@Ni loading and foldable structure on the microwave absorption properties of poly(vinylidene fluoride) (PVDF)/rGO/Cu@Ni composite films was investigated in detail. The microwave absorption properties of the PVDF/rGO/Cu@Ni composite films increased with the rGO/Cu@Ni content increases and then decreased, which was due to the variation of impedance match. Additionally, the foldable structure was found to play a decisive role on the tunable and strong microwave absorption. The minimal reflection loss of -49.1 dB could be obtained for foldable PVDF/20 wt% rGO/Cu@Ni with a thickness of 2.5 mm, and the bandwidth (below -20 dB, 99% dissipation) could reach 6.4 GHz (18.5-19.3 GHz, 20.7-26.5 GHz).