Enhanced Wave Absorption and Mechanical Properties of Cobalt Sulfide/PVDF Composite Materials

Abstract

A cobalt sulfide/PVDF(Polyvinylidene Fluoride) composite was prepared by a simple blending method, and the microstructure of the composite was investigated through X-ray diffraction, scanning electron microscopy, and field emission scanning electron microscopy. Increased absorption properties at frequencies ranging from 2 GHz to 18 GHz were studied, and the mechanical properties were investigated via tensile tests and finite element method simulations. The results indicated that the cobalt sulfide/PVDF composites exhibited strong microwave absorption intensities (−43 dB at 6.6 GHz) with a low filler loading (5.0 wt%). The elastic modulus increased with the cobalt sulfide mass fraction. Cobalt sulfide could improve the mechanical properties of the composite, especially in the lengthwise direction.

Acquirement of Strong Microwave Absorption of ZnFe2O4@SiO2@Reduced Graphene Oxide/PVDF Composite Membranes by Regulating Crystallization Behavior

“…It reduced the reflection of electromagnetic waves on the surface of the material, thus most electromagnetic waves were attenuated inside the material. The comparison of wave absorption performance of as-prepared ZnFe 2 O 4 @SiO 2 @RGO/PVDF samples with similar composites is presented in Table . − The ZnFe 2 O 4 @SiO 2 @RGO/PVDF shows superiority in both optimal RL value and thickness. Therefore, it will be suitable for wave absorption applications.…”