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Optical, electrical, and electrochemical properties of graphene based water soluble polyaniline composites
Author(s) -
Meriga Venkanna,
Valligatla Sreeramulu,
Sundaresan Sivaprakash,
Cahill Caroline,
Dhanak Vinod R.,
Chakraborty Amit K.
Publication year - 2015
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.42766
Subject(s) - polyaniline , materials science , graphene , thermogravimetric analysis , raman spectroscopy , fourier transform infrared spectroscopy , cyclic voltammetry , sulfonic acid , composite material , x ray photoelectron spectroscopy , conductive polymer , thermal stability , scanning electron microscope , chemical engineering , polymer , polymer chemistry , electrochemistry , nanotechnology , chemistry , physics , optics , electrode , engineering , polymerization
ABSTRACT Polyaniline (PANI) is one of the most common polymers known for its conducting properties. However, poor water solubility limits its applications. In this work, PANI has been functionalized with sulfonic acid groups to produce sulfonated PANI (SPANI) offering excellent solubility in water. To compensate for the decrease of electrical conductivity due to functionalization, SPANI was combined with reduced graphene oxide (RGO) to form SPANI/RGO composites with interesting optical, thermal, and electrical properties. The composites have been characterized using X‐ray diffraction (XRD), field emission scanning electron microscopy, UV–vis absorption spectroscopy, Raman spectroscopy, Fourier‐transform infrared spectroscopy, X‐ray photoelectron spectroscopy, thermogravimetric analysis, cyclic voltammetry, and four probe electrical conductivity measurement. The SPANI/RGO composites show increased thermal stability, reduced optical band gap and improved electrochemical properties compared with the pure polymer. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42766.