Synthesis and EMI shielding studies of polyaniline grafted conducting nanohybrid. Issue 2 (30th July 2020)

• Record Type: Journal Article
• Authors: Raza, Asif; Nasir, Amara; Tahir, Mehwish; Taimur, Shaista; Yasin, Tariq; Nadeem, Muhammad
• Is Part Of: Journal of applied polymer science. Volume 138:Issue 2(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-07-30
• Subjects: conducting polymers -- emulsion polymerization -- grafting -- thermogravimetric analysis; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.49680
• Languages: English
• ISSNs: 0021-8995

Abstract

Abstract: 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. Abstract :