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Synthesis, characterization, and corrosion inhibition study of polyaniline‐α‐Fe 2 O 3 nanocomposite
Author(s) -
Umare S. S.,
Shambharkar B. H.
Publication year - 2012
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.37799
Subject(s) - polyaniline , dodecylbenzene , materials science , nanocomposite , thermal stability , corrosion , aniline , aqueous solution , superparamagnetism , polymerization , chemical engineering , nuclear chemistry , dopant , conductive polymer , polymer chemistry , polymer , sulfonate , sodium , chemistry , composite material , organic chemistry , metallurgy , magnetization , doping , physics , optoelectronics , quantum mechanics , magnetic field , engineering
Polyaniline (PANI)‐α‐Fe 2 O 3 nanocomposites (NCs) have been synthesized by chemical oxidative in situ polymerization of aniline in presence of α‐Fe 2 O 3 nanoparticles at 5°C using (NH 4 ) 2 S 2 O 8 as an oxidant in an aqueous solution of sodium dodecylbenzene sulphonic acid (SDBS), as surfactant and dopant under N 2 atmosphere. The room temperature conductivity of NCs decreases and coercive force ( H c ) increases with an increase addition of α‐Fe 2 O 3 in PANI matrix. The result of FTIR and TGA shows that the interaction between α‐Fe 2 O 3 particles and PANI matrix could improve the thermal stability of NCs. NCs demonstrate the superparamagnetic behavior. The performance of PANI and PANI‐α‐Fe 2 O 3 NCs as protective coating, against corrosion of 316LN stainless steel in 3.5% NaCl was assessed by potentiodynamic polarization technique. The study shows a good corrosion inhibition effect of both the coatings. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013