Synthesis and EMI shielding studies of polyaniline grafted conducting nanohybrid

Polyaniline (PANI) grafted conducting nanohybrids are successfully synthesized by emulsion graft polymerization. Maximum grafting of 644% is obtained on sepiolite at optimized concentrations and reaction conditions. The Fourier transform infrared (FT‐IR) spectra of sepiolite grafted polyaniline (MS‐...

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Bibliographic Details
Published in:Journal of applied polymer science 2021-01, Vol.138 (2), p.n/a
Main Authors: Raza, Asif, Nasir, Amara, Tahir, Mehwish, Taimur, Shaista, Yasin, Tariq, Nadeem, Muhammad
Format: Article
Language:English
Subjects:
Attenuation
conducting polymers
Electrical resistivity
Electron microscopy
Emulsion polymerization
Fourier transforms
Frequency ranges
Grafting
Infrared spectra
Materials science
Microscopy
Polyanilines
Polymers
Sepiolite
Shielding
Thermal stability
thermogravimetric analysis
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Summary:Polyaniline (PANI) grafted conducting nanohybrids are successfully synthesized by emulsion graft polymerization. Maximum grafting of 644% is obtained on sepiolite at optimized concentrations and reaction conditions. The Fourier transform infrared (FT‐IR) spectra of sepiolite grafted polyaniline (MS‐g‐PANI) nanohybrid revealed the presence of stretching vibrations of C=C bonds of polyaniline at 1580 and 1490 cm−1 along with the characteristic peaks of sepiolite. Increased thermal stability of the nanohybrid is observed with the increase in polyaniline grafting. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) are used to study the structural changes caused by grafting. A progressive increase in electrical conductivity is observed with the increase in grafting yield. Maximum electrical conductivity of 0.427 Scm−1 is observed in the nanohybrid having 644% grafting. 24.2 dB (>99% attenuation) EMI shielding effectiveness has been exhibited by the developed nanohybrids in X‐band frequency range.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.49680