Green Tea Extract Enrichment: Mechanical and Physicochemical Properties Improvement of Rice Starch-Pectin Composite Film

The effects of green tea extract (GTE) at varying concentrations (0.000, 0.125, 0.250, 0.500, and 1.000%, w/v) on the properties of rice-starch-pectin (RS-P) blend films were investigated. The results showed that GTE addition enhanced (p < 0.05) the antioxidation properties (i.e., total phenolic...

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Bibliographic Details
Published in:Polymers 2022-06, Vol.14 (13), p.2696
Main Authors: Homthawornchoo, Wantida, Han, Jaejoon, Kaewprachu, Pimonpan, Romruen, Orapan, Rawdkuen, Saroat
Format: Article
Language:English
Subjects:
Antiinfectives and antibacterials
Antimicrobial agents
Antioxidants
Biomedical materials
Biopolymers
Composite materials
Elongation
Food packaging
Food products
Fourier transforms
Functional groups
Green tea
Humidity
Infrared spectroscopy
Light transmission
Mechanical properties
Moisture content
Moisture effects
Pectin
Permeability
Rice
Scavenging
Silicones
Spectrum analysis
Tea
Tensile strength
Water vapor
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Summary:The effects of green tea extract (GTE) at varying concentrations (0.000, 0.125, 0.250, 0.500, and 1.000%, w/v) on the properties of rice-starch-pectin (RS-P) blend films were investigated. The results showed that GTE addition enhanced (p < 0.05) the antioxidation properties (i.e., total phenolic content, DPPH radical scavenging activity, and ferric reducing antioxidant power) and thickness of the RS-P composite film. The darker appearance of the RS-T-GTE blend films was obtained in correspondence to the lower L* values. However, the a* and b* values were higher toward red and yellow as GTE increased. Though GTE did not significantly alter the film solubility, the moisture content and the water vapor permeability (WVP) of the resulting films were reduced. In addition, the GTE enrichment diminished the light transmission in the UV-Visible region (200−800 nm) and the transparency of the developed films. The inclusion of GTE also significantly (p < 0.05) lowered the tensile strength (TS) and elongation at break (EAB) of the developed film. The FT-IR spectra revealed the interactions between RS-P films and GTE with no changes in functional groups. The antimicrobial activity against Staphylococcus aureus (TISTR 764) was observed in the RS-P biocomposite film with 1% (w/v) GTE. These results suggested that the RS-P-GTE composite film has considerable potential for application as active food packaging.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym14132696