Ionic liquid - Assisted emulsion polymerization of aniline in organic medium

Loan F. Calheiros , Bluma Guenther Soares , Guillerme M.O. Barra , Sébastien Livi (1)

1 IMP - Ingénierie des Matériaux Polymères

Polyaniline doped with dodecylbenzene sulfonic acid (PAni.DBSA) with different conductivities and morphologies was prepared by inverted emulsion polymerization, in toluene using ammonium peroxydisulfate as the oxidizing agent, in the presence of two different imidazolium based ionic liquids, such as, 1-methyl-3-butyl imidazolium tetrafluorate (bmim.BF4) and 1-(11-carboxyundecyl)-3-methylimidazolium bromide (mimC(10)COOH.Br). The influence of ionic liquid on the morphology and particle size of formed PAni.DBSA samples was investigated by field emission - scanning electron microscopy (FEG-SEM) and dynamic light scattering (DLS) measurements. Ultraviolet visible measurements were also employed to confirm the structure of the conducting polymer. PAni.DBSA samples were also characterized by thermogravimetric analysis, cyclic voltammetry and X-ray photoelectron spectroscopy (XPS). PAni.DBSA samples prepared in the presence of ionic liquids have shown improved dispersability in epoxy resin as indicated by optical micrograph.

Mots clés: Composite materials; Polymers; Chemical synthesis; Electrical characterization; Electrical conductivity; Thermogravimetric analysis

Domaines: Polymères; Matériaux

Loan F. Calheiros, Bluma Guenther Soares, Guillerme M.O. Barra, Sébastien Livi. Ionic liquid - Assisted emulsion polymerization of aniline in organic medium. Materials Chemistry and Physics, 2016, 179, pp.194-203. ⟨10.1016/j.matchemphys.2016.05.028⟩. ⟨hal-01398502⟩