Abstract
HBPE of different generations were synthesized using 4-hydroxybenzoic acid and 2,2′,2″-nitrilotriethanol via the A2 + B3 method. The reaction was carried out in a dry nitrogen atmosphere using p-toluene sulfonic acid (p-TSA) as an acid catalyst. The chosen molar ratios of 2,2′,2″-nitrilotriethanol to 4-hydroxybenzoic acid were 1:3, 1:6, and 1:21 for the G1, G2, and G5 generations, respectively. The G5 stage of HBPE was further coupled with acrylic acid to modify the terminal hydroxyl groups. The resulting products were analyzed using 1H NMR, 13C NMR, FTIR spectroscopy, and GPC. Silver nanoparticles were prepared by a reductive technique using HBPEs of the G5 generation as the matrix. XRD and TEM analysis indicated the formation of highly spherical and stable nanosilver in the HBPE. The antibacterial activity of the nanosilver/HBPE was evaluated against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) bacteria.
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The authors thank the management of VIT University, Vellore, for providing the excellent research facilities.
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Kavitha, C., Priya Dasan, K. Nanosilver/hyperbranched polyester (HBPE): synthesis, characterization, and antibacterial activity. J Coat Technol Res 10, 669–678 (2013). https://doi.org/10.1007/s11998-013-9499-x
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DOI: https://doi.org/10.1007/s11998-013-9499-x