Abstract
Multiwalled carbon nanotubes (MWCNTs) doped respectively La(NO3)3 and Ce(NO3)3 as absorber and polyvinyl chloride (PVC) as matrix were used to fabricate MWCNT/PVC composites. The microstructure and micromorphology of MWCNTs doped respectively La(NO3)3 and Ce(NO3)3 were investigated using transmission electron microscope (TEM) and X-ray diffraction (XRD). The electromagnetic wave absorption properties and pyrolysis behaviour of MWCNT/PVC, MWCNT-La(NO3)3/PVC and MWCNT-Ce(NO3)3/PVC composites were measured by a network analyzer and simultaneous thermal analysis. The results indicated that the electromagnetic wave absorbing properties of MWCNT/PVC composites were substantially improved after doping with a suitable amount of rare earth element in the frequency range from 2 to 18GHz, and the pyrolysis behaviour amost did not changed. In the range of R<-10dB of the reflection losses, the absorbing bandwidths of MWCNT-Ce(NO3)3/PVC composites was narrower (about 5.4 GHz) than that of MWCNT-La(NO3)3/PVC composites (about 5.6 GHz), and the absorption band and peak value shifted to the higher frequency region. It is favorable to improve the electromagnetic wave absorption properties of MWCNT/PVC composites in a high frequency region.
| Original language | English |
|---|---|
| Pages (from-to) | 1741-1744 |
| Number of pages | 4 |
| Journal | Gongneng Cailiao/Journal of Functional Materials |
| Volume | 44 |
| Issue number | 12 |
| DOIs | |
| State | Published - 30 Jun 2013 |
Keywords
- Electromagnetic wave absorbing properties
- Multiwalled carbon nanotubes
- Polyvinyl chloride
- Rare earth