title: Physico-chemical and microstructural properties of fish gelatin/agar bio-based blend films.
abstract: 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.
authors.affiliation: Department of Seafood Processing, Faculty of Marine Sciences, Tarbiat Modares University, P.O. Box 46414-356, Noor, Iran.
authors.forename: Setareh
authors.initials: S
authors.lastname: Mohajer
authors.affiliation: Department of Seafood Processing, Faculty of Marine Sciences, Tarbiat Modares University, P.O. Box 46414-356, Noor, Iran. Electronic address: rezai_ma@modares.ac.ir.
authors.forename: Masoud
authors.initials: M
authors.lastname: Rezaei
authors.affiliation: Department of Seafood Processing, Faculty of Marine Sciences, Tarbiat Modares University, P.O. Box 46414-356, Noor, Iran. Electronic address: Hosseinisf@modares.ac.ir.
authors.forename: Seyed Fakhreddin
authors.initials: SF
authors.lastname: Hosseini
mesh_terms: D000362:Agar / Q000737:chemistry*; D000818:Animals; D005399:Fishes; D005780:Gelatin / Q000737:chemistry*; D010539:Permeability; D012995:Solubility; D013718:Tensile Strength
chemical_list: D005780:Gelatin; D000362:Agar
keywords: Agar; Bio-based films; Film structure; Fish gelatin; Physico-chemical properties