Journal
CARBOHYDRATE POLYMERS
Volume 157, Issue -, Pages 784-793Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.10.061
Keywords
Bio-based films; Fish gelatin; Agar; Physico-chemical properties; Film structure
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Funding
- Iran National Science Foundation (INSF) [93008916]
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This study was conducted with the aim of improving the physico-chemical properties of fish gelatin (FG) based films. For this purpose, FG was blended with agar (AG) in different compositions to acquire biodegradable films (100:0, 80:20, 60:40, 50:50 & 0:100, FG:AG). The obtained results showed that the AG addition strongly increased the film rigidity and resistance to fracture, while reducing the film stretchability, mainly at 50FG: 50AG ratio. AG incorporation greatly reduced the water vapor permeability (WVP) and solubility of gelatin films, as this decline for the blend film with a 50:50 ratio of biopolymers has been about 41% and 66%, respectively (p<0.05). Additional advantages of AG inclusion to FG films are the reduction of the UV-transmittance. Both polymers showed good compatibility, as demonstrated by scanning electron microscopy (SEM) and atomic force microscopy (AFM) images. Therefore, the blend composition influenced the properties of FG/AG bio-based films. (C) 2016 Elsevier Ltd. All rights reserved.
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