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Synthesis and EMI shielding studies of polyaniline grafted conducting nanohybrid
Author(s) -
Raza Asif,
Nasir Amara,
Tahir Mehwish,
Taimur Shaista,
Yasin Tariq,
Nadeem Muhammad
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.49680
Subject(s) - polyaniline , materials science , grafting , fourier transform infrared spectroscopy , chemical engineering , scanning electron microscope , thermal stability , polymerization , nanocomposite , conductive polymer , polymer chemistry , conductivity , sepiolite , polymer , composite material , chemistry , organic chemistry , raw material , engineering
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.