Polypyrrole/Al₂O₃ nanocomposites: preparation, characterisation and electromagnetic shielding properties

Figures & data

Figure 1. SEM-micrograph of PPy/Al₂O₃ nanoparticles (magnification: 20,000×).

Figure 2. Raman spectra of PPy/Al₂O₃.

Table 1. Wavenumbers and assignments of Raman bands of PPy/Al₂O₃ nanocomposites.

Wavenumber (cm^−1)			Assignment
Theoretical calculation 11 (oxidised PPy)	PPy on Zn 2 (oxidised PPy)	PPy/Al2O3 (oxidised PPy)
1676.6	1584	1584	C=C ring stretching
1524.4	1414	1410	C–N stretching
1307.2	1327	1328
–	1258	1249
1049.4	1046	1047	C–H in-plane deformation
955.8	989	976	C–H stretching
–	938	919
–	859	864

Figure 3. TGA curve of PPy/Al₂O₃ nanocomposites.

Figure 4. Scheme for SE measurements using two coaxial transmission lines.

Figure 5. SE data obtained from the samples of PPy/Al₂O₃ coated fabrics.

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