Experimental and simulation studies on the wave-absorbing performance of epoxy resin-filled composite honeycomb sandwich structure
The composite honeycomb sandwich structure(CHSS)filled with ferrosoferric oxide@reduced graphene oxide(Fe3O4@rGO)aerogel/epoxy resin was designed.The Fe3O4@rGO particles were characterized by Raman spectroscopy and X-ray photoelectron spectroscopy,and their electromagnetic parameters and wave-absorbing performance were analyzed.The research results showed that Fe3O4@rGO was successfully prepared and Fe3O4 was well dispersed in the aerogel.The conductive loss of Fe3O4@rGO to electromagnetic waves as well as the magnetic loss provided good microwave absorption performance for the material,and the effective wave-absorbing bandwidth of CHSS showed a tendency to increase first and then decrease as the thickness of the Fe3O4@rGO aerogel/epoxy resin layer increased.When the thickness of Fe3O4@rGO aerogel/epoxy resin layer in CHSS was 2.5 mm,the effective absorption bandwidth reached the maximum,the thickness of the CHSS with the best performance was 7.8 mm,the effective absorption bandwidth reached 7.09 GHz,and the maximum reflection loss(RL)value reached-17.76 dB.Comprehensively,it showed that a composite honeycomb sandwich material had been prepared in this study,and the desired wave-absorbing performance could be achieved by using epoxy resin to backfill and encapsulating the aramid honeycomb.
万方数据
维普
