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% 33 RS, 0.3% SA, Gly 30% w/w and 0.2% surfactant (tween®20) provided film with good 34 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.
|Number of pages||9|
|Journal||International Journal of Biological Macromolecules|
|Issue number||part A|
|Early online date||16 Sep 2016|
|Publication status||Published - Dec 2016|
Thakur, R., Saberi, B., Pristijono, P., Golding, J. B., Stathopoulos, C. E., Scarlett, C., Bowyer, M. C., & Vuong, Q. (2016). Characterization of rice starch- ι-carrageenan biodegradable edible film: effect of stearic acid on the film properties. International Journal of Biological Macromolecules, 93(part A), 952-960. https://doi.org/10.1016/j.ijbiomac.2016.09.053