Microwave absorbing properties of alternating multilayer composites consisting of poly (vinyl chloride) and multi-walled carbon nanotube filled poly (vinyl chloride) layers

Retracted Article: A versatile strategy for alternately arranging the foam ratio layers of multilayer graphene/thermoplastic polyurethane composite foams towards lightweight and broadband electromagnetic wave absorption

“…The reason for this phenomenon may be due to the effect of ambiguity of the interface becoming increasingly obvious with the increment in the layer number. 85 As for sample 2L, it exhibited good EW-absorbing properties at lower layers and lower thicknesses, compared to the 6L, 8L, and 10L samples, with a minimum reflection loss of −35.66 dB at 7 mm thickness and an EB value of 4.9 GHz. Therefore, samples 2L and 4L with better EW-absorbing properties were selected for further study.…”

Effect of Polar Polymers of PEG and PVA on the Enhanced Microwave-Absorbing Properties of MWNTs

“…Recently, microwave-absorbing materials have received extensive attention because of their significant roles in dealing with the problem of electromagnetic microwave pollution in our daily life, such as electronics and electrical devices, communication equipment, and special in stealth defense system for military. , With advances in nanotechnology, nano-microwave absorbers, which can eliminate the incident electromagnetic wave fundamentally by converting the electromagnetic energy into thermal energy or dissipating the electromagnetic waves through interference, had acted as a great action in developing novel microwave-absorbing materials with excellent properties of a strong microwave absorption, low density, wide frequency area, and thinner thickness. Based on the microwave reflection loss mechanism, there are mainly two major categories: one is magnetic loss and the other electric loss. − Spinel ferrites and carbonyl iron are the absorbing materials with magnetic loss, which reveal great complex permeability due to the excellent magnetic hysteresis loss and outstanding nature resonance loss. ,− The carbon materials (graphene, carbon fiber, carbon nanotube, etc.) and conducting polymers are part of the electric loss absorbing materials, which exhibit high dielectric properties because of a superior relaxation loss and a conspicuous electric loss. ,− …”

Broadband Microwave Absorbing Composites with a Multi-Scale Layered Structure Based on Reduced Graphene Oxide Film as the Frequency Selective Surface

“…Figure 10 summarizes the microwave absorption performance of the composites with multilayer structure in recent years. The sandwich structure combined with the FSS makes the proposed composite highly competitive with respect to other composites with pure multilayer structure, which cannot satisfy low thickness and wide bandwidth conditions simultaneously [ 6 , 9 , 38 , 39 , 40 , 41 ]. Introducing FSS into the sandwich structure can be an effective way to solve the above issue [ 10 , 42 , 43 ].…”