Rafik,

that was a good answer! the chapter you referred to has a subchapter which deals with the thermodynamic background of why there can be no true solutions for conductive polymers. Here is the text of this subchapter:

https://www.researchgate.net/publication/202290125_Conductive_Polymer_Solvent_Systems_Solutions_or_Dispersions?ev=srch_pub&_sg=y1JC74_9c-1rChweLPoIxXqhWSF7yeMKe0n-kGooq3gbhyv8Y5Ul3FX9Pnfz2zjs.tiJI8HzH6f2D2g6relWAtBqw1ct2LfoL6eyQXnKA6AbxdbrceDbUOmisY7erfc71.0R8LHVO42WIo2-06b-MdUVIfXDty7-k90GTrUNa0AeDj5Ir3CGR-gdsEkwnlYJCN

Article Conductive Polymer / Solvent Systems: Solutions or Dispersions?

Dear Vimal,

According to the conclusions from previous answers to the same question, Polyaniline,  is not soluble in any solvent at; neither the doped, nor the undoped form.

For more on this topic, please use the following links:

https://www.researchgate.net/post/What_are_the_best_solvents_for_Polyaniline_emeraldine_salt/1

https://www.researchgate.net/publication/253651172_Conductive_Polymers_as_Organic_Nanometals

Hoping this will be helpful,

Rafik

Chapter Conductive Polymers as Organic Nanometals

Rafik,

that was a good answer! the chapter you referred to has a subchapter which deals with the thermodynamic background of why there can be no true solutions for conductive polymers. Here is the text of this subchapter:

https://www.researchgate.net/publication/202290125_Conductive_Polymer_Solvent_Systems_Solutions_or_Dispersions?ev=srch_pub&_sg=y1JC74_9c-1rChweLPoIxXqhWSF7yeMKe0n-kGooq3gbhyv8Y5Ul3FX9Pnfz2zjs.tiJI8HzH6f2D2g6relWAtBqw1ct2LfoL6eyQXnKA6AbxdbrceDbUOmisY7erfc71.0R8LHVO42WIo2-06b-MdUVIfXDty7-k90GTrUNa0AeDj5Ir3CGR-gdsEkwnlYJCN

Article Conductive Polymer / Solvent Systems: Solutions or Dispersions?

Thanks Bernhard and Rafik Sir for your responses. So, if I have got PANI-ES in powdered form, then is there any way through which I can deposit a thin film of PANI-ES on some substrate like glass or PET etc.?

first, how did you get the PAni-ES powder? (did you buy or prepare yourself?)

In case you bought, I don't see high chances you can prepare a good dispersion.

In case you prepared yourself, which temperature / time did you use? (you need to run polymerisation very slowly at ~constant temperature ~5 degC. and wash well)

which counterion is used? (which acid is used for "doping"?) (HCl is bad, H2SO4 no good, p-toluene sulfonic acid best)

if above everything ok, then try DMSO, but for layer formation you need to take care of drying well afterwards (DMSO is hard to remove; don't overheat, max 150 degC, use vacuum, take long time)

Hi everybody,

I have the same problem as Vimal. If he bought the ES from Sigma, the dopant used, is sulfonic acid. 

which sulfonic acid? there are manymany of them!

Good question, as per answers you need to prefer DMSO in 1:2 ratio (PANI:DMSO) and kept for several days, and then do sonication for few minutes. Perhaps PANI will dissolve.

for a good and real *dispersion* (anyway, a "solution" is principally not possible), a ratio of 1:2 is much too much PAni! 1% PAni in DMSO is ok, otherwise you don't have a real dispersion.