Anionic surfactant doped synthesis of Poly Aniline Dendritic (PANID) fibers and its anti-corrosion performance. (June 2020)

• Record Type: Journal Article
• Authors: Siva, T.; Bharathidasan, T.; Sathiyanarayanan, S.
• Is Part Of: Materials today communications. Volume 23(2020)
• Publication Date: 2020-06
• Subjects: Interfacial polymerization -- PANID fibers -- SEM -- TEM -- EIS -- SVET; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2019.100812
• Languages: English
• ISSNs: 2352-4928

Abstract

Graphical abstract: Highlights: DBSA doped interfacial polymerisation was used to synthesize PANID fibers in the nano range (100–200 nm). For the first time, the PANID fibers are mixed directly with organic paint formulation and sprayed over a mild steel substrate. PANID fibers coatings depict good corrosion resistance for 35 days in highly aggressive environment (3 % NaCl solution). Self-Healing performance were observed in the defect area of PANID fibers coatings by SVET analysis. The PANID fibers coated samples exposed to salt spray (500 h), but no corrosion product (blisters) was ever visually visible compared with epoxy coating (120 h). 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 cm 2 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).