Papers by E. Akbarinezhad
Progress in Organic Coatings, 2011
In the present work, polyaniline/clay nanocomposite (PAniCN) was synthesized by chemical oxidativ... more In the present work, polyaniline/clay nanocomposite (PAniCN) was synthesized by chemical oxidative polymerization of aniline monomers in the presence of Closite30B powders. XRD and SEM examinations were used to examine the intercalation and morphologies of PAniCN, respectively. Electrical conductivity test showed that the conductivity of final PAniCN was higher than pristine PAni by one order of magnitude. Synthesized nanocomposite was
In this research, corrosion properties of water-based epoxy coating is improved by adding self-do... more In this research, corrosion properties of water-based epoxy coating is improved by adding self-doped nano polyaniline (SPAni) synthesized using supercritical carbon dioxide (ScCO2) medium. The modified ScCO2-synthesized self-doped nano polyaniline (SPAni) using water-based polyamidoamine hardener results formation of the water-based SPAni composite (Sc-WB). To obtain the water-based polyaniline epoxy coating (SP-WBE), the Sc-WB was mixed with epoxy resin in stoichiometric ratio. The formation of oxide layers and adhesion properties of SP-WBE at corrosive medium was evaluated using scanning electron microscopy (SEM) studies. The transmission electron microscopy (TEM) was used to observe the distribution and particles size of nanopolyaniline in the final dried film. The anti-corrosion performance of water-based epoxy coated sample (blank coated sample) and SP-WBE coated sample was studied using salt spray standard test according to ASTM B-117, electrochemical impedance spectroscopy (E...
Progress in Organic Coatings, 2015
ABSTRACT Degradation mechanisms of modified nano carbon black (CB)-epoxy coatings were investigat... more ABSTRACT Degradation mechanisms of modified nano carbon black (CB)-epoxy coatings were investigated under condition of UV irradiation. Transmission Electron Microscopy (TEM) and Field Emission Scanning Electron Microscopy (FESEM) confirmed that nanoparticles were finely distributed throughout epoxy resin and its solvent. Various characterization tools, including ATR-FTIR, colorimeter and Optical Microscope (OM) were used to evaluate the effects of CB content on the progressive changes in chemical elements, color and microcracks of the nanocomposite coatings. ATR-FTIR analysis indicated that concentration of carbonyl group generated by chain scission was much less for the 2.5 wt% CB nanocoating than the neat epoxy coating. It was found that microcracks were appeared on the neat epoxy coatings surfaces after 1000 h UV exposure. No microcracks were observed in 2.5 wt% CB nanocoating. It was revealed that CB nanoparticles were good UV stabilizers that could absorb UV irradiation and protect epoxy-based coatings.
Progress in Organic Coatings, 2015
ABSTRACT The synthesis of a polyaniline–clay nanocomposite (PAniC NC) was achieved using the in s... more ABSTRACT The synthesis of a polyaniline–clay nanocomposite (PAniC NC) was achieved using the in situ polymerization of aniline in a Cloisite® 30B nanoclay suspension in a supercritical CO2 (Sc-CO2) medium. The interfacial co-polymerization of aniline (ANI) and m-aminobenzenesulfonic acid (SAN) in the presence of Cloisite® 30B was performed in Sc-CO2/water to produce the SPANI-clay NC. The NC was then mixed with a water-based hardener. This water-based composite is developed with the goal of reducing environmental and health risks. The use of this Sc-CO2 technique produced a composite material that resulted in the enhanced protection of carbon steel against corrosion when compared to a similar composite synthesized under atmospheric conditions. The materials obtained were characterized using UV/visible spectroscopy, X-ray powder diffraction and scanning and transmission electron microscopy. The anti-corrosion performance and the adhesion properties of these coatings were evaluated using standardized tests. Electrochemical impedance spectroscopy was also used to determine the electrochemical properties of these anti-corrosion coatings. Better exfoliation and dispersion of the clay was achieved using the Sc-CO2 medium resulting in superior performances in corrosion and electrochemical tests because of the higher level of intercalation.
Dam-Johansen, K., 327 Debnath, NC, 159 Devi, S., 114 Dhoke, SK, 53 DuPois, J., 285
Surface Engineering, 2009
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Applied Surface Science, 2015
ABSTRACT The electrochemical behavior and anticorrosion properties of modified carbon black (CB) ... more ABSTRACT The electrochemical behavior and anticorrosion properties of modified carbon black (CB) nanoparticles in epoxy coatings were investigated in accelerated conditions. Nanoparticles of CB were modified by sodium dodecyl sulfate (SDS) as surfactant. Dispersion of nanoparticles into epoxy was confirmed by Transmission Electron Microscopy (TEM). The accelerated condition was prepared at 65 °C. CB nanoparticles improved corrosion resistance of the epoxy coating. The optimum concentration of CB in the epoxy coating was 0.75 wt%. Results showed that the CB hinder the corrosion due to its barrier properties. CB can decrease the diffusion coefficient of water in the coating with filling the micropores.
Surface Engineering, 2008
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Surface Engineering, 2008
... Inter-pretation of impedance data was performed using well known computer analysis program na... more ... Inter-pretation of impedance data was performed using well known computer analysis program named ... in good agreement with the results of EEC models, and this approach could be ... Successful application of different approaches in analys-ing organic paint coatings with EIS ...
Surface Engineering, 2007
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Research on Chemical Intermediates, 2013
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Progress in Organic Coatings, 2014
Progress in Organic Coatings, 2009
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Papers by E. Akbarinezhad