[5-1130-P] Postharvest/Food Technology and Process Engineering (5th)

[5-1130-P-07] Properties of Rice Starch-Based Film Incorporated with Zinc Oxide Nanoparticles

KHALISHAH RAHMA SAFIRA^1,2, *SAROAT RAWDKUEN² (1. Department of Food Science and Technology, Faculty of Agricultural Technology and Engineering, Bogor Agricultural University(Indonesia), 2. Unit of Innovative Food Packaging and Biomaterials, School of Agro-Industry, Mae Fah Luang University(Thailand))

キーワード：Antimicrobial packaging, Nanocomposite film, Nanoparticle, Rice starch, Zinc oxide

This study aimed to develop rice starch based antimicrobial film as an active food packaging with zinc oxide nanoparticles (ZnO-NPs) incorporation. ZnO-NPs were synthesized by hydrothermal method and their formation was confirmed by using XRD analysis. The synthesized ZnO-NPs showed an average size of < 100 nm with spherical shape under the scanning electron microscope (SEM). The nanoparticles were studied against two foodborne pathogens bacteria; Staphylococcus aureus and Escherichia coli at different concentrations (0 – 5 %, w/v) and found effective against both microorganisms. The ZnO-NPs (3%, w/w) was selected for the incorporation into rice starch-based (5%) antimicrobial film with sorbitol as plasticizer via solution casting method. Physical, mechanical, chemical, and antimicrobial properties of the films were examined. Presence and distribution of nanoparticles in the film were confirmed with SEM and FTIR. Incorporation of zinc oxide nanoparticles significantly decreased (p<0.05) the transparency (2.64 ± 0.01), solubility (19.22 ± 0.39%), WVP (0.04 ± 0.00 x 10^-10 g m/m² Pa s), and elongation at break (37.18 ± 2.61%), while increased the lightness (89.73 ± 0.06) and tensile strength (9.14 ± 0.78 MPa) of the film were observed (p<0.05). The rice starch/ZnO-NPs nanocomposite films showed antibacterial activity against S. aureus and E. coli. These results suggest that rice starch/ZnO-NPs nanocomposite film can be used as active packaging materials.