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      • KCI등재후보

        Polymerisation and characterisation of conducting polyaniline nanoparticle dispersions

        S. E. Moulton,P. C. Innis,Kane-Maguire,O. Ngamna,G. G. Wallace 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4

        Micellar emulsion chemical polymerisation of polyaniline (PANI) using dodecylbenzenesulfonic acid (DBSA) as the micelle anddopant was performed at 20.C. It was necessary to use a ratio of 1:1:1 for aniline, oxidant (ammonium persulfate APS) and DBSAto produce the PANIÆDBSA in the emeraldine salt (ES) form in large quantities (40 g). The resulting polymer was a nanodispersionwith spherical particles 10±2 nm in diameter and an electrical conductivity of 15±3 Scm. 1 as determined by transmission electronmicroscopy (TEM) and the four-point probe method, respectively. UVvis spectral characterisation showed the nanodispersion tobe highly doped. Complete deprotonation of the polymer to the emeraldine base form using 0.5 M NaOH was only possible upondilution to approximately 0.05% w/v polymer. Reduction of the polymer to leucoemeraldine using phenylhydrazine was relativelyslow; however, oxidation to pernigraniline in 0.25 M APS occurred instantaneously.

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