01717nas a2200217 4500008004100000022001400041245009500055210006900150260006900219300001200288490000700300520095400307653001301261653001401274653001901288653001601307653000801323100001801331700002201349856012801371 2006 eng d a0300-944000aConducting polymer based hybrid nano-composites for enhanced corrosion protective coatings0 aConducting polymer based hybrid nanocomposites for enhanced corr aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcDEC a332-3360 v573 a

Hybrid composite coatings containing zinc oxide (ZnO) and polyaniline (PANI) as nano-additives dispersions were prepared with poly(vinyl acetate) (PVAc) as the major matrix. The steel plates dip-coated with these formulations were tested for corrosion protection by immersion in saline water over long periods. The Tafel plots for the determination of open circuit potential (OCP) and corrosion current (I-corr) were recorded. The coatings containing both ZnO and PANI showed improved corrosion resistance as compared to the single component coating. The I-corr values of PVAc-ZnO-PANI are found to be two-order magnitude lower than that of PVAc and PVAc-ZnO coatings. The results are explained on the basis of enhancement in barrier properties due to nano-particulate additives in PVAc-ZnO-PANI film together with the redox behaviour of PANI and protective oxide layer formation near the substrate. (C) 2006 Elsevier B.V All rights reserved.

10aCoatings10acorrosion10anano-additives10apolyaniline10aZnO1 aPatil, R., C.1 aRadhakrishnan, S. uhttps://library.ncl.res.in/content/conducting-polymer-based-hybrid-nano-composites-enhanced-corrosion-protective-coatings-001929nas a2200217 4500008004100000022001400041245008300055210006900138260006900207300001200276490000700288520116800295653002501463653001001488653001601498653001901514100002201533700002301555700001701578856011601595 2009 eng d a0300-944000aEpoxy powder coatings containing polyaniline for enhanced corrosion protection0 aEpoxy powder coatings containing polyaniline for enhanced corros aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcMAR a383-3860 v643 a

Incorporation of polyaniline (PANI) in epoxy type powder coating formulations has not been attempted earlier. Using specific grade of PANI with low doping, it can be incorporated in epoxy powder coating formulations by twin screw extrusion process. The powder formulations were deposited on steel substrates by electrostatic spray coating at -60 W and baked at 140 degrees C for 20 min. These were extensively tested for corrosion resistance by exposure to hot saline conditions followed by electrochemical impedance spectroscopy and also salt spray testing. PANI incorporated coatings showed no deterioration even after 1400 h of hot (65 degrees C) saline treatment. The coatings intentionally scratched also exhibited self healing property and there was no rust formation even after prolonged exposure to hot saline conditions. These results could be explained on the basis of additional crosslinking due to PANI, as confirmed by DSC results, which gave rise to improved barrier property and self healing was associated with the scavenging of ions by PANI which prevented corrosion of the underlying substrate. (C) 2008 Elsevier B.V. All rights reserved.

10aCorrosion resistance10aEpoxy10apolyaniline10aPowder coating1 aRadhakrishnan, S.1 aSonawane, Narendra1 aSiju, C., R. uhttps://library.ncl.res.in/content/epoxy-powder-coatings-containing-polyaniline-enhanced-corrosion-protection-001966nas a2200241 4500008004100000022001400041245005800055210005800113260006900171300001200240490000800252520118600260653002701446653002001473653002001493653001601513100002301529700002301552700002201575700002101597700001801618856008801636 2011 eng d a0379-677900aPolyaniline modified electrodes for detection of dyes0 aPolyaniline modified electrodes for detection of dyes aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcMAY a659-6640 v1613 a

Polyaniline (PANI) is one of the most extensively used conjugated polymers in the design of electrochemical sensors. In this study, we report electrochemical dye detection based on PANI for the adsorption of both anionic and cationic dyes from solution. The inherent property of PANI to adsorb dyes has been explored for the development of electrochemical detection of dye in solution. The PANI film was grown on electrode via electrochemical polymerization. The as grown PANI film could easily adsorb the dye in the electrolyte solution and form an insulating layer on the PANI coated electrode. As a result, the current intensity of the PANI film was significantly altered. Furthermore, PANI coated stainless steel (SS) electrodes show a change in the current intensity of Fe(2+)/Fe(3+) redox peaks due to the addition of dye in electrolyte solution. PANI films coated on both Pt electrodes and non-expensive SS electrodes showed the concentration of dye adsorbed is directly proportional to the current intensity or potential shift and thus can be used for the quantitative detection of textile dyes at very low concentrations. (C) 2011 Elsevier B.V. All rights reserved.

10aElectrochemical sensor10aEmeraldine base10aEmeraldine salt10apolyaniline1 aMahanta, Debajyoti1 aMunichandraiah, N.1 aRadhakrishnan, S.1 aMadras, Giridhar1 aPatil, Satish uhttps://library.ncl.res.in/content/polyaniline-modified-electrodes-detection-dyes-0