title: Characterization of rice starch-ι-carrageenan biodegradable edible film. Effect of stearic acid on the film properties.
abstract: The main aim of this study was to develop rice starch (RS), ι-carrageenan (ι-car) based film. Different formulations of RS (1-4%, w/w), ι-car (0.5-2%, w/w) was blended with stearic acid (SA; 0.3-0.9%, w/w) and glycerol (1%, w/w) as a plasticizer. The effect of film ingredients on the thickness, water vapour permeability (WVP), film solubility (FS), moisture content (MC), colour, film opacity (FO), tensile strength (TS), elongation-at-break (EAB) of film was examined. Interactions and miscibility of partaking components was studied by using Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). Hydrocolloid suspension solution of mix polysaccharides imparted a significant impact (p<0.05) on the important attributes of resulting edible film. TS and EAB of film were improved significantly (p<0.05) when ι-car was increased in the film matrix. Formulation F1 comprising 2% ι-car, 2% RS, 0.3% SA, Gly 30% w/w and 0.2% surfactant (tween®20) provided film with good physical, mechanical and barrier properties. FT-IR and XRD results reveal that molecular interactions between RS-ι-car have a great impact on the film properties confining the compatibility and miscibility of mixed polysaccharide. Results of the study offers new biodegradable formulation for application on fruit and vegetables.
authors.affiliation: School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia. Electronic address: Rahul.thakur@uon.edu.au.
authors.forename: Rahul
authors.initials: R
authors.lastname: Thakur
authors.affiliation: School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia.
authors.forename: Bahareh
authors.initials: B
authors.lastname: Saberi
authors.affiliation: School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia.
authors.forename: Penta
authors.initials: P
authors.lastname: Pristijono
authors.affiliation: School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia; NSW Department of Primary Industries, Ourimbah, NSW 2258, Australia.
authors.forename: John
authors.initials: J
authors.lastname: Golding
authors.affiliation: Division of Food and Drink, School of Science, Engineering and Technology, University of Abertay, Dundee DD1 1HG, UK.
authors.forename: Costas
authors.initials: C
authors.lastname: Stathopoulos
authors.affiliation: School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia.
authors.forename: Christopher
authors.initials: C
authors.lastname: Scarlett
authors.affiliation: School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia.
authors.forename: Michael
authors.initials: M
authors.lastname: Bowyer
authors.affiliation: School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia. Electronic address: vanquan.vuong@newcastle.edu.au.
authors.forename: Quan
authors.initials: Q
authors.lastname: Vuong
mesh_terms: D002351:Carrageenan / Q000737:chemistry*; D018857:Food Packaging; D012275:Oryza / Q000737:chemistry; D010539:Permeability; D012995:Solubility; D013213:Starch / Q000737:chemistry*; D013229:Stearic Acids / Q000737:chemistry*; D013718:Tensile Strength
chemical_list: D013229:Stearic Acids; D002351:Carrageenan; D013213:Starch
keywords: Biodegradable; Biopolymers; Edible film