Synthesis and Characterization of Polyaniline

Synthesis of polyaniline as the main approach to obtain electroactive and conducting composite materials.Conducting composite material formed in the form of semiconductor.Organic polymer semiconductor material like polyaniline (polymeraldine salt) can be easily synthesized and it is the only conducting polymer material whose electronic structure and electrical properties can reversibly controlled by oxidation and protonation.PANI exist in three state leucomeraldine, emerldine,pernigraniline.But only emerldine salt shows conducting nature in the form of semiconductor.PANI used various applications, they can replace metals and semiconductors, because they have conductivity feature, low density, and easy process ability.Polyaniline is a representive from the family of conducting polymerhaving high environmental stability.This paper shows chemical method for synthesis of Polyaniline and compare its semiconducting properties with conventional semiconductor.