Synthesis of self-curing bio-based eugenol-epoxy resin an application to metal surface coating

Abstract

In a course of successive reaction, eugenol was reacted with the 1,4-butandiol diglycidyl ether yields the reactive species 3,3’-(butane-1,4-diylbis (oxy) bis(1-(4-allyl-2-methoxyphenoxy) propane-2-ol). It contains the two alcoholic hydroxy which further reacted with the epichlorohydrin gives the 2,2’-(3,12-bis((4-allyl-2-methoxyphenoxy) methyl)-2,5,10,13-tetraoxatetradecane-1,14-diyl) bis (oxirane) (BMTO). BMTO is an active monomer consisting of two epoxy functionals at terminal. In the next series of experiments, the combination of epoxy acrylate resin with BMTO in presents of fixed amount of triethyl tetraamine formulated gives the polymer composite material. The coating material has an active bio-ingredient eugenol gives positive activity against bacteria P. aeruginosa, Staphylococcus, E. coli, and C. albicans as metals coating substrate. The final polymer has the tested with the various tests such as X-ray diffraction (XRD), gel content analysis, water absorption testing, thermogravimetric analysis (TGA), and a differential scanning calorimeter (DSC) study. The results showed effective nature of eugenol-based epoxy (BMTO). The functionality of the eugenol-based epoxy (BMTO) and structural properties were evaluated by gas chromatography–mass spectrometry (GC–MS), proton nuclear magnetic resonance (¹H-NMR), and infrared (IR) spectra. The study examined the properties of cured epoxy, focusing on its thermal, mechanical, and anti–corrosion characteristics.