Journal
CARBOHYDRATE POLYMERS
Volume 87, Issue 2, Pages 1495-1502Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2011.09.040
Keywords
Carboxymethylcellulose; Murta leaves extracts; Montmorillonite; Nanocomposites active films; Antioxidant properties
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Funding
- ANPCyT [35036/05]
- UNLP of Argentina [X-494]
- CYTED [309AC0382]
- DIUFRO [120617/DI06-0001]
- INNOVA CORFO of Chile [06CN12PAT-57]
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The functionality of nanocomposite films based on carboxymethylcellulose (CMC) and montmorillonite (MMT) activated with murta (Ugni molinae Turcz) leaves extract was studied. Films were prepared by casting from film-forming dispersions containing CMC, glycerol (used as plasticizer) and different concentrations of MMT, using water or murta extract as solvent. The addition of MMT increased the tensile strength and the elasticity modulus of the films, and decreased their permeabilities to water vapor, oxygen and carbon dioxide. Besides the antioxidants properties provided to the films, the addition of murta leaves extract changed the gas permeability in different forms according to the MMT content, and plasticized the nanocomposite matrix. (C) 2011 Elsevier Ltd. All rights reserved.
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