New dopant-solvent system for conductive PAN films production

We have offered a new pathway for preparation of the water-soluble polyaniline (PAN) using sulfoacid CF3-CF2-O-CF2-CF(CF3)-O-CF2-CF2-SO3H. e found then that in the presence of this sulfoacid emeraldine base becomes soluble in the mixture of m-cresol and hexafluor-iso-propanol. High quality films were cast from this solution. Their conductivity reached 10 S/cm. For comparison, we have prepared well-known system “camphorsulfonic acid — m-cresol” with the same sample of PAN and obtained high-quality films with conductivity of ca. 200 S/cm. Some aspects of “secondary doping” concept are discussed.