Superior wave-absorbing performances of silicone rubber composites via introducing covalently bonded SnO2@MWCNT absorbent with encapsulation structure

By Jia Zhao, Junliang Zhang, Lei Wang, Jiakun Li, T. Feng, Juncheng Fan, Lixin Chen, Junwei Gu. 2020

146 citations recorded by the source corpus.

Abstract SnO2@MWCNT wave absorbent was firstly fabricated via a hydrothermal process followed by heat treatment. Then SnO2@MWCNT/silicone rubber wave-absorbing composites were obtained by solution casting method. XRD, Raman, TGA, XPS, and TEM analyses indicated the successful preparation of covalently bonded SnO2@MWCNT absorbent with encapsulation structure. When the mass fraction of SnO2@MWCNT was 7.5 wt% and the sample thickness was 2.6 mm, the SnO2@MWCNT/silicone rubber wave-absorbing composite displayed the minimum reflection loss (RLmin) of −56.9 dB and effective absorption bandwidth (EAB) of 3.1 GHz. The outstanding wave-absorbing performances of SnO2@MWCNT/silicone rubber wave-absorbing composites could be ascribed to the excellent impedance matching and dielectric loss capability. Furthermore, the corresponding 7.5 wt% SnO2@MWCNT/silicone rubber wave-absorbing composite exhibited heat resistance index (THRI) of 196.3 °C, higher than that of neat silicone rubber (187.4 °C).

Subfields: Aerospace Engineering, Biomedical Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/98a67e64bd273ad231c3cd7b94739502c2ff0501