Open AccessEffects of Multi-walled Carbon Nanotubes on the Microwave Absorbing Properties of Magnetorheological Elastomers
Author(s) -
Fengchao Ye,
Xingsheng He,
Jiajia Zheng
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/774/1/012115
Subject(s) - materials science , composite material , carbonyl iron , elastomer , microwave , compression molding , reflection loss , silicone rubber , carbon nanotube , permittivity , natural rubber , magnetorheological elastomer , magnetorheological fluid , composite number , dielectric , optoelectronics , damper , structural engineering , engineering , mold , physics , quantum mechanics
The microwave absorbing properties of carbonyl iron particles (CIPs) based magnetoheological elastomer (MRE) filled with multi-walled carbon nanotubes (MWCNTs) were examined. Absorbents including the CIPs and MWCNTs were mixed and added to the silicone rubber (SR) matrix for further compression molding and vulcanization. The complex permittivity and complex permeability were measured over a frequency range of 2-18GHz. As the MWCNT weight percentage increased, the reflection loss (RL) of the MRE composites changed significantly, which is attributed to the impedance mismatch. The MRE composites containing 28 wt% CIPs and 0.1 wt% MWCNTs with a thickness of 3 mm display dual resonance peaks with a maximum RL of -53 dB and the effective frequency bandwidth (RL<-10dB) reaches 7.7 GHz. This suggests that the MRE composites could serve as a potential candidate for absorbing incident microwave with excellent flexibility.