Development and characterization of edible bilayer films based on iron yam–pea starch blend and corn zein

Abstract

We prepared bilayer films of iron yam-pea starch and corn zein to evaluate their potential application in the packaging of instant foods and condiments. We found that the water resistance and mechanical properties of bilayer films were improved after adding a layer of corn zein compared with the monolayer films of the starch materials. Scanning electron microscopy revealed that the bilayers were close and this was reflected in increased thermal stability and biocompatibility between layers with the addition of zein. Our experimental films showed greater elongation at break than the commercial biaxially oriented polypropylene polyethylene films. Based on the results of this study, the iron yam-pea starch/corn zein films have the mechanical strength and flexibility to be used for convenience food packaging materials, which are expected to provide consumers with clean products.

A Biodegradable and Active Bilayer Nanocomposite Obtained from Starch‐Yerba Mate Extract and Starch‐TiO2 Nanoparticles Films for Packaging Applications

“…In addition, differentiated layers can be evidenced by the presence of nanoparticles in one of them. Song and Wang (2021) reported similar observations for bilayer films from iron yam‐pea starch and zein‐basal starch films, where no evidence of phase separation was found on SEM micrographs [ 47 ] due to the high compatibility between the layers. [ 48 ]…”

Effect of Storage Conditions on the Physicochemical Characteristics of Bilayer Edible Films Based on Iron Yam–Pea Starch Blend and Corn Zein

“…The bilayer films were prepared following Song and Wang [46]. Our previous study found that IYP10/CZ3 (10 mL iron yam-pea starch forming solution with 3 mL corn zein solution) bilayers have good mechanical and barrier properties [46].…”

“…The iron yam (Dioscorea opposita Thunb) is the only Chinese yam variety protected by the national origin protection list [45]. The content of iron yam starch is up to 28%, which can be used as the base material for the development of edible film [46]. Corn zein contains more hydrophobic amino acids and is a good material for preparing waterproof film [47].…”

Effect of thymol on physical properties, antimicrobial properties and fresh-keeping application of cherry tomato of starch/PBAT extrusion blowing films

“…And starch based fully degradable composite film is also the frontier hotspot of international research (Gao et al, 2021;Cui et al, 2021;Santoso et al, 2022). However, the water vapor barrier and tensile properties of the film are poor, which seriously limits its application as packaging materials (Dilkes-Hoffman et al, 2018;Gómez-Aldapa et al, 2020;Song & Wang, 2021). In order to make the processing properties of starch based materials better, starch is usually blended with hydrophobic biodegradable polymers such as polyhydroxyalkanoates (PHA) (Sun et al, 2018), polylactic acid (PLA) (Pizzoli et al, 2016;Shirai et al, 2013), pol (ε-caprolactone) (PCL) (Mahieu et al, 2013) and poly (butylene succinate-co-butylene adipate) (PBSA) (Mahieu et al, 2017) to prepare composite films, which is an effective method to produce more suitable thin film materials.…”