Green Nanosilver as Reinforcing Eco-Friendly Additive to Epoxy Coating for Augmented Anticorrosive and Antimicrobial Behavior |
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| Authors: | Email author" target="_blank">R?ManjumeenaEmail author R?Venkatesan D?Duraibabu J?Sudha N?Rajendran P?T?Kalaichelvan |
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| Affiliation: | 1.Centre for Advanced Studies in Botany,University of Madras,Chennai,India;2.National Institute of Ocean Technology,Pallikarani,Chennai,India;3.Department of Chemistry,Anna University,Chennai,India;4.Department of Materials Engineering,Indian Institute of Science,Bangalore,India |
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| Abstract: | Epoxy resin GY250 representing diglycidyl ethers of bisphenol-A (DGEBA) was reinforced with 1, 3 and 5wt % of surface functionalized silver nanoparticles (F-AgNPs) which were synthesized using Couroupita guianensis leaves extract with a view of augmenting the corrosion control property of the epoxy resin and also imparting antimicrobial activity to epoxy coatings on mild steel. Corrosion resistance of the coatings was evaluated by EIS, potentiodynamic polarization studies and cross scratch tests. AFM, SEM, HRTEM and EDX were utilized to investigate the surface topography, morphology and elemental composition of the coatings on MS specimens. Results showed that the corrosion resistance, hardness and Tg of the DGEBA/F-AgNPs coatings increased at 1wt % of F- AgNPs. The DGEBA/F-AgNPs coatings also offered manifold antimicrobial protection to the MS surfaces by inhibiting the growth of biofilm forming bacteria like P. aeruginosa, B. subtilis, the most common human pathogen E. coli and the most virulent human pathogenic yeast C. albicans. |
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