Synthesis of processable polyaniline complexed with anionic surfactant andits conducting blends in aqueous and organic system

Processable polyaniline doped and complexed with dodecylbenzenesulfonic aci d (PANI/DBSA) was synthesized by one-step micellar chemical oxidative polym erization of aniline in the presence of dodecylbenzenesulfonic acid. PANI/D BSA composite can be redispersed in water after purification at the appropr iate content of DBSA. Its particle size at various DBSA/PANI molar ratios p repared by this procedure was investigated by using diluted suspension. Hom ogeneous suspension in m-cresol was also obtained without precipitation by using PANI/DBSA. Such a processable polyaniline was used to prepare polyani line composites blended with polyvinyl alcohol (PVA) in water and polyacryl ate in organic solvents, respectively. All these two types of composite sho w high conductivity despite the low weight fractions of polyaniline and its complex with DBSA. Effects of DBSA/PANI molar ratio on conductivity of pol yaniline composite, dispersity of polyaniline in aqueous system, and stabil ity of the dispersion were also studied. Increase of DBSA/PANI molar ratio can improve the conductivity of PANI/DBSA composite as well as its complex with PVA due to the increase of dispersity of PANI in the aqueous system in the presence of anionic surfactant. (C) 2000 Elsevier Science S.A. All rig hts reserved.