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Journal of Materials
Volume 2013 (2013), Article ID 413578, 6 pages
http://dx.doi.org/10.1155/2013/413578
Research Article

PVA/Polysaccharides Blended Films: Mechanical Properties

Laboratório de Química de Proteínas, Departamento de Bioquímica e Biologia Molecular, ICB 2, Universidade Federal de Goiás, Caxia Postal 131, 74001-970 Goiânia, GO, Brazil

Received 30 November 2012; Revised 1 March 2013; Accepted 8 March 2013

Academic Editor: Peter Chang

Copyright © 2013 Fábio E. F. Silva et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Blends of polyvinyl alcohol (PVA) and angico gum (AG) and/or cashew gum (CG) were used to produce films by casting method. Morphological and mechanical properties of these films were studied and compared to the properties of a commercial collagen membrane of bovine origin (MBO). The films presented thickness varying from 70 to 140 μm (PVA/AG) and 140 to 200 μm (PVA/CG). Macroscopic analysis showed that a PVA/CG film was very similar to MBO regarding the color and transparency. The higher values of tensile strength (TS) and elastic modulus (EM) were observed in the film. On the other hand, PVA/CG and PVA/CG-AG presented the highest value of percentage of elongation (E%). Pearson’s Correlation Analysis revealed a positive correlation between TS and EM and a negative correlation between E% and EM. The PVA/CG film presented mechanical properties very similar to MBO, with the advantage of a higher E% (11.96) than MBO (2.94). The properties of the PVA blended films depended on the polysaccharide added in the blend, as well as the acid used as a catalyst. However, all produced films presented interesting mechanical characteristics which enables several biotechnological applications.