Poly(ethylene terephthalate) films modified by UV-induced surface graft polymerization of vanillin derived monomer for antibacterial activity

Hanène Salmi-Mani, Gabriel Terreros, Nadine Barroca-Aubry, Caroline Aymes-Chodur, Christophe Regeard, Philippe Roger

Index: 10.1016/j.eurpolymj.2018.03.038

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Abstract

New antibacterial PET surfaces were developed from vanillin-derived biobased monomer. An easy one-step and high yielding synthesis of N-(4-hydroxy-3-methoxybenzyl)-acrylamide monomer was successfully achieved. PET was modified by a two-step procedure: Type II photoinitiator was first grafted through a PET aminolysis with N,N-diethylethylenediamine, then the photopolymerization of the biobased acrylamide monomer was performed according to a “grafting from” technique. PET surface modifications were characterized by XPS and UV-visible spectroscopies, as well as water contact angle measurements. Finally, antiadhesion biotests were conducted to evaluate the potential antibacterial performances of the modified surfaces against gram-positive (Rhodococcus wratislaviensis and Staphylococcus aureus) and gram-negative (Escherichia coli and Pseudomonas aeruginosa) strains.