Synthesis and characterization of electrically conducting polyaniline in water-oil microemulsion

Nanoscopic polyaniline particles were successfully synthesized in a stable water-oil microemulsion. FT-IR spectra showed that sodium dodecylbenzenesul fonate (SDBA) acted both as surfactant and dopant in the acidic reaction me dia. Wide-angle X-ray diffraction, UV-visible spectra and thermal analysis suggested that the crystallinity of PANI synthesized in the microemulsion s ystem was increased dramatically while the chain-transfer reactions of co-s urfactants decreased the pi-conjugation length along the polymer chain.