Preparation and structural analysis of polyaniline doped with organic acid

Polyaniline doped with dodecyl benzenesulfonic acid(DBSA),sulfo-salicylic acid(SSA) aminobenezenesulfonic acid(ABSA) and citric acid(CA) were prepared and labeled as DBSA-PANI,SSA-PANI,ABSA-PANI and CA-PANI.Analysis results of FT-IR showed that all the doped polyaniline samples appears the typical absorptions.The typical absorptions of DBSA-PANI and SSA-PANI are more obvious.SEM observations revealed that the polyaniline samples doped with ABSA and CA are micron/nano-particles.The solubility of polyaniline is improved by the doping,because the large organic acid molecules enable the weakening in the interaction between the macromolecules of polyaniline,and hence the conductivity is also improved.The conductivity of polyaniline doped with SSA reaches to 1 S/cm.