I would like to apply polyaniline coating in acidic medium, which is the best acid for coating by Potentiostat?
oxalic acid on oxidation will give carbon dioxide, avoid
use sulphuric acid
niline and pyrrole copolymers were synthesized for
different monomer ratios from a mixed
electrolyte containing 0.1M oxalic acid and 0.1M do
decyl benzene sulphonic acid (DBSA) using a 4-
step electrochemical method. Results were compared
to those obtained for polymers prepared from an
electrolyte of oxalic acid only. It was found that
the presence of DBSA increases the polymerization
rates for polymer deposited from the mixed monomer
electrolytes, but not for the homopolymers. For
copolymers deposited from monomer mixtures of high
aniline content, deposition rates were generally
low, due to the low conductivity of these samples.
FTIR and cyclic voltammetry results confirm the
presence of both monomers in the polymers deposited
from the mixed electrolyte, and FTIR indicates
that copolymers, rather than mixtures, are formed.
Results from AC impedance spectroscopy show that
the presence of DBSA results in an increased double
layer capacitance for the homopolymers and
increased low frequency capacitance for those sampl
es with low pyrrole content.
http://www.electrochemsci.org/papers/vol3/3091065.pdf
- Badges
- Science topic
- Similar topics
- Engineering
- Materials Engineering
- Coating