Effect of re-crystallization on tensile, optical and water vapour barrier properties of corn starch films containing fatty acids

By A. Jiménez, M. Fabra, P. Talens, A. Chiralt. 2012

223 citations recorded by the source corpus.

Abstract Starch films are very hygroscopic and undergo crystallization during processing and storage. In this work, fatty acids (SA, PA and OA) were incorporated into starch films containing glycerol as plasticizer, in order to reduce the hygroscopic character of the films and to improve water vapour permeability. Microstructural, mechanical, barrier and optical properties were studied in both non-stored films and those stored for 5 weeks. Fatty acid addition affected the main properties of films since mechanical resistance was decreased, water vapour permeability was reduced and gloss and transparency were reduced. The degree of starch and FA crystallinity increased with storage time and gave rise to changes in film properties: films became stiffer, less effective as water vapour barriers and less transparent and glossy. Saturated fatty acids were more efficient at reducing WVP as compared to oleic acid, but these differences decreased after storage due to the greater increase in crystallization of the former as it has been observed by X-ray diffraction.

Subfields: Biomaterials

View Paper: https://www.semanticscholar.org/paper/4fb206598d1b0b6752d9393fc2678123af4076f5

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In Biomaterials

1. A. Chiralt
2. C. González-Martínez
3. A. Jiménez
4. M. Cháfer
5. M. Fabra
6. P. Talens
7. J. Kenny
8. E. Fortunati

Citations in the corpus

• Physical properties and stability of starch-gelatin based films as affected by the addition of esters of fatty acids (2015, methodology): “This effect has previously been reported in corn 296 starch films containing fatty acids (Jiménez et al., 2012a).”
• Properties and ageing behaviour of pea starch films as affected by blend with poly(vinyl alcohol) (2015, methodology): “Finally, glycerol was added at a 131 starch:glycerol ratio of 1:0.25, on the basis of previous studies (Jiménez et al., 2012b).”
• Edible and Biodegradable Starch Films: A Review (2012, methodology): “To this end, several works study the possibility of substituting the petro-based plastics with biodegradable, lowcost materials with similar properties (Psomiadou et al. 1996; Mali et al. 2002, 2006; Famá et al. 2007; Jiménez et al. 2012).”