Dear Anil,
Polyaniline membrane (PANi) can be protonated (doped) with a non-oxidizing protonic acid such as HCl to films having conductivities of ~10 S/cm16. On the basis of conductivity, and stability of the product, HCl and H2SO4 are the best dopants for protonation of PANi. The electrochemical polymerisation of aniline is believed to proceed via the cation radical (see attached publication, PANi).
Similarly, PANI microelectrodes, made from fibres prepared from doped solution of polyaniline protonated with 2-acrylamido-2-methyl-1-propanesulfonic acid in dichloracetic acid exhibit good conductivity in solutions of high acidity (pH ≤1) (see attached publication, PANi 1).
Hoping this will be helpful,
Rafik
Dear Sir
Thanks for your reply. I need help in understanding the effect of HCl dopant on the morphology of polyaniline film. If you have any paper on this please send me.
Thanks and regards
Anil
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