Rice Starch Based Film Incorporated with Zinc Oxide Nanoparticles
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Date
2020Author
Safira, Khalishah Rahma
Budi, Faleh Setia
Rawdkuen, Saroat
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Show full item recordAbstract
This study aimed to develop rice starch-based antimicrobial film 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 diameter size of 79.25 ± 0.69 nm
with spherical shape under the scanning electron microscope (SEM). The
nanoparticles were tested against Gram-positive and Gram-negative bacteria;
Staphylococcus aureus and Escherichia coli at different concentrations (1, 3, and 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 ZnO-NPs significantly decreased (p<0.05) the transparency (2.64
± 0.01), solubility (19.24 ± 0.78 %), WVP (0.04 ± 0.00 x 10-10 g m/m2 Pa s), and
elongation at break (37.18 ± 2.71 %), while increased the lightness (89.72 ± 0.04)
and tensile strength (9.14 ± 0.75 MPa) of the film were observed (p<0.05). The rice
starch/ZnO-NPs film showed antibacterial activity against tested bacteria. These
results suggest that rice starch/ZnO-NPs film had the potential to be used as an
active packaging material.
Keywords: antimicrobial packaging, nanocomposite film, nanoparticles, rice
starch, zinc oxide Studi bertujuan untuk mengembangkan film anti mikroba berbasis pati beras
diinkorporasi dengan nano partikel ZnO (ZnO-NPs). ZnO-NPs disintesis dengan
metode hidrotermal dan pembentukannya dikonfirmasi dengan menggunakan
analisis XRD. ZnO-NPs yang disintesis menunjukkan ukuran diameter rata-rata
79.25 ± 0.69 nm dengan bentuk bulat dengan analisis SEM. Aktivitas antimikroba
ZnO-NPs diuji terhadap bakteri Gram-positif dan Gram-negatif; Staphylococcus
aureus dan Escherichia coli pada konsentrasi yang berbeda (1, 3, dan 5%, b/v) dan
efektif terhadap kedua mikroorganisme. ZnO-NPs (3%, b/b) dipilih untuk
diinkorporasikan ke dalam film anti mikroba berbasis pati beras (5%) dengan
sorbitol sebagai plasticizer dengan metode solution casting. Sifat fisik, mekanik,
kimia dan anti mikroba dari film diuji. Keberadaan dan distribusi partikel nano padafilm dikonfirmasi dengan SEM dan FTIR. Inkorporasi ZnO-NPs pada film berbasis
pati beras secara signifikan menurunkan (p<0.05) transparansi film (2.64 ± 0.01),
kelarutan film (19.24 ± 0.78 %), WVP (0.04 ± 0.00 x 10-10 g m/m2 Pa), dan
elongation at break (37.18 ± 2.71 %), sementara terjadi peningkatan kecerahan film
(89.72 ± 0.04) dan kekuatan tarik film (9.14 ± 0.75 MPa) (p <0.05). Film berbasis
pati beras dengan inkorporasi ZnO-NPs menunjukkan aktivitas antibakteri terhadap
bakteri yang diuji. Hasil ini menunjukkan bahwa film pati beras / ZnO-NPs
memiliki potensi untuk digunakan sebagai bahan kemasan aktif.
Kata kunci: film antimikroba, film nanokomposit, nanopartikel, pati beras, seng
oksida