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TitleAntimicrobial nanostructured starch based films for packaging
Author(s)Abreu, Ana S.
Oliveira, M.
Rodrigues, Rui M.
Cerqueira, M. A.
Vicente, A. A.
Machado, A. V.
Sá, Arsénio Vasconcelos
Antimicrobial activity
Silver nanoparticles
Nanostructured films
Food packaging
Issue date20-Sep-2015
JournalCarbohydrate Polymers
CitationAbreu, Ana S.; Oliveira, M.; Rodrigues, Rui M.; Cerqueira, M. A.; Vicente, A. A.; Machado, A. V., Antimicrobial nanostructured starch based films for packaging. Carbohydrate Polymers, 129, 127-134, 2015
Abstract(s)Montmorillonite modied with a quaternary ammonium salt C30B/starch nanocomposite (C30B/ST-NC), silver nanoparticles/starch nanocomposite (Ag-NPs/ST-NC) and both silver nanoparticles/C30B/starch nanocomposites (Ag-NPs/C30B/ST-NC) films were produced. The nanoclay (C30B) was dispersed in a starch solution using an ultrasonic probe. Different concentrations of Ag-NPs (0.3, 0.5, 0.8 and 1.0 mM) were synthesized directly in starch and in clay/starch solutions via chemical reduction method. Dispersion of C30B silicate layers and Ag-NPs in ST films characterized by X-ray and scanning electron microscopy showed that the presence of Ag-NPs enhanced clay dispersion. Color and opacity measurements, barrier properties (water vapor and oxygen permeabilities), dynamic mechanical analysis and contact angle were evaluated and related with the incorporation of C30B and Ag-NPs. Films presented antimicrobial activity against Staphylococcus aureus, Escherichia Coli and Candida Albicans without significant differences between Ag-NPs concentrations. The migration of components from the nanostructured starch films, assessed by food contact tests, was minor and under the legal limits. These results indicated that the starch films incorporated with C30B and Ag-NPs have potential to be used as packaging nanostructured material.
Publisher version
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series
IPC - Artigos em revistas científicas internacionais com arbitragem

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