Nanosilver/hyperbranched polyester (HBPE): synthesis, characterization, and antibacterial activity / C. Kavitha in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 5 (09/2013)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 5 (09/2013) . - p. 669-678 Titre : Nanosilver/hyperbranched polyester (HBPE): synthesis, characterization, and antibacterial activity Type de document : texte imprimé Auteurs : C. Kavitha, Auteur ; K. Priya Dasan, Auteur Année de publication : 2013 Article en page(s) : p. 669-678 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acide polyacrylique Antibactériens Antimicrobiens Argent Caractérisation Nanoparticules Polyesters Polymères -- Synthèse Polymères ramifiés Solubilité Index. décimale : 667.9 Revêtements et enduits Résumé : 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. Note de contenu : - EXPERIMENTAL SECTION : Materials - Characterization - Synthesis of hyperbranched polyester and end group modification - Viscosity measurement - Preparation of silver nanoparticles - ANTIBACTERIAL ACTIVITY : Preparation of culture media for incubation of microorganisms - Antimicrobial activity - RESULTS AND DISCUSSION : FTIR study - NMR analysis - Characterization of silver nanoparticles - Antimicrobial activity of nanosilver/HBPE DOI : 10.1007/s11998-013-9499-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9499-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=19801 [article]

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