Anticorrosive coating of polyesteramide resin by functionalized ZnO-Al2O3-Fly ash composite and functionalized multiwalled carbon nanotubes

摘要

In accordance to synthesis of sustainable coating, the carboxyl terminated Polyesteramide resin is synthesized from fatty amide of palm oil. To improve the performance of the coating the ZnO-Al2O3-fly ash composite and functional Multiwall Carbon nanotubes (MWCNTs) were added to the system. The ZnO-Al2O3-fly ash composite was treated with amine-silane to develop the amino functionality on the periphery. The MWCNT's were treated to develop the carboxyl functionality. The presence of functionality on the ZnO-Al2O3-fly ash composite and MWCNT enable the chemical bonding of same to the coating matrix, improving the performance of the coating. ZnO-Al2O3-fly ash composites were characterised by FTIR, SEM analysis and XRD, to confirm the modification, Also singular and synergistic effect chemically bonded nanocomposite to the coating system was studied by varying the composite ratio as 5% (w/w) & 10% (w/w), MWCNTs ratio individually 0.25% (wjw) & 0.5% (w/w) and in combination of both. The anticorrosive properties were improved, impedance value increases from 100 M (ohms) to 10 G (ohms) in EIS measurement. As well as hardness of the coating increases from H to 4H, scratch resistance increases from 2 kg to 3.1 kg. (C) 2016 Elsevier B.V. All rights reserved.