Intrinsic antibacterial thermosets resin from eugenol and soybean oil: Synthesis and properties

The use of solvent-free approach to manufacture antibacterial epoxy coatings with high renewable carbon content is of important for environmental sustainability and the diversity of antibacterial materials. Herein, an epoxy monomer with inherent antibacterial properties, eugenol-modified epoxidized soybean oil (EUESO) with totally natural carbon was synthesized from renewable epoxidized soybean oil (ESO) and eugenol via one-step solvent-free method. Then, EUESO was cured with DGEBA and 4, 4 & PRIME;-diaminodicyclohexylmethane (HDDM) to construct mechanically robust and anti-release antibacterial epoxy coatings. The influence of the weight ratio of EUESO on epoxy coating and comprehensive performance was systematically studied. According to DSC, TGA and bending test on the thermal and mechanical properties of the cured resins, all cured resins demonstrated high thermodynamic properties and high Tg. Meanwhile, in the dynamic shake test, all cured resins demonstrated a certain degree of killing effect on Escherichia coli (E. coli), with a maximum killing rate of 93.8% as the concentration of EUESO increased.

Automated summary

The use of a solvent-free approach to manufacture antibacterial epoxy coatings with high renewable carbon content is important for environmental sustainability and the diversity of antibacterial materials. In this study, a solvent-free method was used to synthesize eugenol-modified epoxidized soybean oil (EUESO), an epoxy monomer with inherent antibacterial properties and a totally natural carbon source. The cured resins showed high thermodynamic and mechanical properties, as well as a certain degree of killing effect on Escherichia coli (E. coli) in the dynamic shake test.