Anionic surfactant doped synthesis of Poly Aniline Dendritic (PANID) fibers and its anti-corrosion performance

Abstract

A Novel method of the polyaniline dendritic (PANID) fibers by interfacial polymerization of aniline in chloroform (organic phase) and oxidant of ammonium persulfate (APS), Dodecylbenzene sulfonate (DBSA) (aqueous phase) were controlled by the presence of surface-active dopants. As synthesized dendritic fibers are directly mixed into the organic paint formulation and applied over the steel surface by brush painting. The morphology of dendritic fibers was characterized by Field Emission Scanning Electron Microscopy (FESEM) and Transmission Electron Microscope (TEM). Corrosion prevention of the PANID fibers coatings over the Carbon steel surface was determined by using electrochemical impedance spectroscopy (EIS). The impedance values PANID fibers coatings are remained at 10 7 Ώ cm2 even up to 35 day's evaluation whereas the pure epoxy coatings have lost their corrosion protection ability in 3 % NaCl solution. The self-healing ability of PANID fibers coatings cured within 24 h exposure was evaluated by scanning vibrating electrode technique (SVET).