Self-assembled ultralight three-dimensional (3D) polypyrrole
(PPy) Aerogel for effective electromagnetic absorption
Supplemental Material
S1 Experimental section
S1.1 Materials
The pyrrole, anhydrous FeCl3 and ethanol were purchased from GENERALREAGENT, Titan Scientific Co., Ltd, Shanghai, China. Distilled water was obtained
from Direct-Q3 UV, Millipore.
S1.2 Characterization and measurement
The detailed morphologies of the 3D-PPy were observed with a field emission
scanning electron microscope (FE-SEM, S4800, Hitachi). The crystal structure of the
as-synthesized samples was identified by X-ray diffractometer (XRD, D8 Advance,
Bruker AXS) from 10° to 80°, using Cu Kα (λ = 1.54 Å) radiation. Raman spectroscopy
was carried out on a Renishaw in Via Raman Microscope, equipped with 532 nm laser.
Fourier transfor infrared (FTIR) spectra were recorded on a Nicolet iS10 FTIR
instrument (Thermo Fisher Scientific, USA).The relative complex permittivity (εr) and
permeability (μr) wer measured by a vector network analyzer (VNA, N5242A PNA-X,
Agilent) in the frequency range of 2-18 GHz.
Tab. S1 Key data of typical PPy based nanocomposites for EA materials (PBOPy: polybenzobisoxazole; Z-BCF: Z-type barium ferrite)
Filler
Matrix
Loading ratio
RLmax
(dB)
Thickness
(mm)
Frequency range (GHz)
(RL below − 10 dB)
Effective bandwidth (GHz)
(RL below − 10 dB)
References
3D-PPy
3D-PPy
PBOPy/PPy/Fe3O4
RGO/PPy/CoFe2O4
RGO/PPy/Fe3O4
Z-BCF/SiO2/PPy
PPy/BaFe12O19/ Ni0.8Zn0.2Fe2O4/RGO
Paraffin
Paraffin
Paraffin
Paraffin
Paraffin
Paraffin
Paraffin
5.0 wt%
7.0 wt%
30.0 wt%
50.0 wt%
50.0 wt%
33.3 wt%
30.0 wt%
− 22.3
− 23.3
− 23.3
− 50.8
− 56.9
−19.6
−25.5
3.0
2.5
3.5
1.5
5.3
2.0
3.0
9.96-15.96
10.72-16.92
11.60-13.84
12.70-16.90
5.31-8.00
12.94-18.00
7.80-11.60
6.00
6.20
2.24
4.20
2.69
5.06
3.80
This work
This work
1 (2014)
2 (2014)
3 (2014)
4 (2014)
5 (2014)
Tab. S2 Key data of typical ICPs based nanocomposites for EA materials (SSP: solid-state polymerization)
Filler
3D-PPy
3D-PPy
PEDOT/RGO/Co3O4
PANi/RGO
3D-RGO/PEDOT
SSP-PEDOT
Ni0.6Zn0.4Fe2O4/PANi
Ba0.85RE0.15Co2Fe16O27/PANi
Matrix
Loading ratio
RLmax
(dB)
Thickness
(mm)
Frequency range (GHz)
(RL below − 10 dB)
Effective bandwidth (GHz)
(RL below − 10 dB)
References
Paraffin
Paraffin
Paraffin
Paraffin
Paraffin
Paraffin
Paraffin
Paraffin
5.0 wt%
7.0 wt%
50.0 wt%
10.0 wt%
10.0 wt%
50.0 wt%
70.0 wt%
60.0 wt%
− 22.3
− 23.3
− 51.1
− 36.9
− 35.5
− 50.1
− 41.0
− 15.1
3.0
2.5
2.0
3.5
2.0
2.0
2.6
3.5
9.96-15.96
10.72-16.92
9.40-12.50
8.20-13.50
11.50-16.50
10.00-15.90
10.62-15.62
6.70-11.30
6.00
6.20
3.10
5.30
5.00
5.90
5.00
4.60
This work
This work
6 (2013)
7 (2014)
8 (2014)
9 (2014)
10 (2015)
5 (2014)
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