Sustainable hydroxypropyl methylcellulose/xylogluc... - BV FAPESP
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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Sustainable hydroxypropyl methylcellulose/xyloglucan/gentamicin films with antimicrobial properties

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Autor(es):
Kondaveeti, Stalin ; Damato, Tatiana C. ; Carmona-Ribeiro, Ana M. ; Sierakowski, Maria R. ; Siqueira Petri, Denise Freitas
Número total de Autores: 5
Tipo de documento: Artigo Científico
Fonte: Carbohydrate Polymers; v. 165, p. 285-293, JUN 1 2017.
Citações Web of Science: 14
Resumo

Hydroxypropyl methylcellulose (HPMC) and xyloglucan (XG) crosslinked with citric acid over a range of HPMC/XG weight ratios formed sustainable blend films characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, tensile tests, circular dichroism and determination of inhibitory activity against Staphylococcus aureus and Escherichia coli. Both in solution and in the crosslinked films, HPMC chains lost the original ordered conformation upon interacting with XG, giving rise to an entropic gain. The highest values of tensile strength (25 MPa) and Young's modulus (689 MPa) occurred for the 50:50 HPMC/XG blend films. In vitro loading of gentamicin sulfate (GS) in the films amounted to 0.18 +/- 0.05-0.37 +/- 0.05 g of GS per g polymer. At pH 7.4 and 37 degrees C, the GS release kinetics from the films fitted with the Korsmeyer-Peppas model revealed a non-Fickian release mechanism with diffusional coefficient n similar to 0.7. The cross-linked films of HPMC, XG and their blends loaded with GS showed outstanding antibacterial activity against Staphylococcus aureus and Escherichia coli, disclosing their potential for novel biomedical applications. (C) 2017 Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 15/25103-2 - Estímulos magnéticos em processos biotecnológicos
Beneficiário:Denise Freitas Siqueira Petri
Modalidade de apoio: Auxílio à Pesquisa - Regular
Processo FAPESP: 15/14415-3 - Preparo de materiais magnéticos poliméricos multifuncionais para aplicações biomédicas
Beneficiário:Stalin Kondaveeti
Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado