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Abstract
Highlights
A flexible and lightweight microwave absorber was prepared by a vacuum filtration method.
The remarkable microwave absorbency makes the absorber paper attractive in wireless wearable electronics field.
Developing a flexible, lightweight and effective electromagnetic (EM) absorber remains challenging despite being on increasing demand as more wearable devices and portable electronics are commercialized. Herein, we report a flexible and lightweight hybrid paper by a facile vacuum-filtration-induced self-assembly process, in which cotton-derived carbon fibers serve as flexible skeletons, compactly surrounded by other microwave-attenuating components (reduced graphene oxide and Fe3O4@C nanowires). Owing to its unique architecture and synergy of the three components, the as-prepared hybrid paper exhibits flexible and lightweight features as well as superb microwave absorption performance. Maximum absorption intensity with reflection loss as low as − 63 dB can be achieved, and its broadest frequency absorption bandwidth of 5.8 GHz almost covers the entire Ku band. Such a hybrid paper is promising to cope with ever-increasing EM interference. The work also paves the way to develop low-cost and flexible EM wave absorber from biomass through a facile method.
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Details
1 Nanjing University of Aeronautics and Astronautics, College of Materials Science and Technology, Nanjing, People’s Republic of China (GRID:grid.64938.30) (ISNI:0000 0000 9558 9911)
2 Nanyang Technological University, School of Materials Science and Engineering, Singapore, Singapore (GRID:grid.59025.3b) (ISNI:0000 0001 2224 0361); Singapore-HUJ Alliance for Research and Enterprise, NEW-CREATE Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), Singapore, Singapore (GRID:grid.454851.9) (ISNI:0000 0004 0468 4884)