Development of cellulose-based bactericidal nanocomposites containing silver nanoparticles and their use as active food packaging


Autoria(s): Moura, Marcia R de; Mattoso, Luiz H. C.; Zucolotto, Valtencir
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

05/11/2013

05/11/2013

2012

Resumo

The use of nanomaterials, including metallic as active fillers in polymeric nanocomposites for food packaging has been extensively investigated. Silver nanoparticles (AgNPs), in particular, have been exploited for technological applications as bactericidal agents. In this paper, AgNPs were incorporated into a hydroxypropyl methylcellulose (HPMC) matrix for applications as food packaging materials. The average sizes of the silver nanoparticles were 41 nm and 100 nm, respectively. Mechanical analyses and water vapor barrier properties of the HPMC/AgNPs nanocomposites were analysed. The best results were observed for films containing smaller (41 nm) AgNPs. The antibacterial properties of HPMC/AgNPs thin films were evaluated based on the diameter of inhibition zone in a disk diffusion test against Escherichia coli (E. coil) and Staphylococcus aureus (S. aureus). The disk diffusion studies revealed a greater bactericidal effectiveness for nanocomposites films containing 41 nm Ag nanoparticles. (C) 2011 Elsevier Ltd. All rights reserved.

Identificador

JOURNAL OF FOOD ENGINEERING, OXFORD, v. 109, n. 3, supl. 1, Part 2, pp. 520-524, APR, 2012

0260-8774

http://www.producao.usp.br/handle/BDPI/41693

10.1016/j.jfoodeng.2011.10.030

http://dx.doi.org/10.1016/j.jfoodeng.2011.10.030

Idioma(s)

eng

Publicador

ELSEVIER SCI LTD

OXFORD

Relação

JOURNAL OF FOOD ENGINEERING

Direitos

closedAccess

Copyright ELSEVIER SCI LTD

Palavras-Chave #SILVER NANOPARTICLES #HYDROXYPROPYL METHYLCELLULOSE #ACTIVE FILMS #PACKAGING #PLANT ESSENTIAL OILS #EDIBLE FILMS #HYDROXYPROPYL METHYLCELLULOSE #ANTIMICROBIAL PROPERTIES #TECHNOLOGIES #COATINGS #BARRIER #ENGINEERING, CHEMICAL #FOOD SCIENCE & TECHNOLOGY
Tipo

article

original article

publishedVersion