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- Title
UV-blocking active packaging film made from TEMPO-oxidized nanocellulose and amine-modified carbon quantum dot.
- Authors
Rezvan, Nasim; Shekarchizadeh, Hajar
- Abstract
UV radiation has destructive effects on food. So, UV-blocking active packaging films are interested in preventing direct food exposure to UV rays. In this research, TEMPO-oxidized nanocellulose film containing amine-modified carbon quantum dots (a-CQDs) was prepared to use as a UV-blocking film in active packaging. A completely randomized design was used for the statistical analysis of the samples. Oxidized nanocellulose film containing CQDs (ONC/a-CQDs) absorbed 99.8% of UVA radiations. The ONC/a-CQDs film had the highest brightness (L* = 52.7), and its transparency was higher than the nanocellulose sample. The addition of CQDs to the oxidized nanocellulose film significantly (P < 0.05) reduced the water vapor permeability of the oxidized nanocellulose film (from 2.54 ± 0.25 to 1.89 ± 0.20 × 10−9 g m/Pa s m2). The addition of CQDs to the film resulted in a denser structure with less porosity, confirming the establishment of a covalent bond between the amine group of a-CQDs and the carboxyl group of the oxidized film. The results of FTIR confirmed the presence of CONH bonds in the ONC/a-CQDs film. X-ray diffraction results showed that the crystalline structure of nanocellulose changed after oxidation due to mercerization. The ONC/a-CQDs film showed the highest tensile strength (1.6 MPa) and thermal resistance (330 °C) due to covalent bonding. Finally, the results showed that adding carbon quantum dots to the oxidized cellulosic film caused high absorption of UV radiation, which did not adversely affect the film properties. Therefore, it would be a very suitable option for ultraviolet radiation-sensitive foods.
- Subjects
PACKAGING film; QUANTUM dots; FILMMAKING; ULTRAVIOLET radiation; CARBOXYL group; RADIATION absorption
- Publication
Journal of Food Measurement & Characterization, 2024, Vol 18, Issue 1, p676
- ISSN
2193-4126
- Publication type
Article
- DOI
10.1007/s11694-023-02197-9