Abstract
Several polyaniline, PANI, samples were inverse emulsion polymerized by doping two surfactants. Experimentally, the triton X-100, TX100, was always used and another surfactant was varied as sodiumlauryl sulfate, SLS, sodium dodecyl sulfonate, SDS, or 5-sulfosallcylic acid dehydrate, SSA, respectively. To compare with the pure or only TX100-doped PANI, the PANI doped by two surfactants all showed enhanced conductivity and thermal stability, e.g. the PANI/TX100+SSA presented the greatest conductivity and the PANI/TX100+SDS presented the best thermal stability. The conductivity enhancement is found due to the doping induced PANI crystallinity increase. The thermal stability increase for PANI is found due probably to the surfactant structure because the symmetric double bonded structure, e.g. SDS and SLS, both showed better thermal behavior.
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