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. 2021 Mar 23;7(3):e06550.
doi: 10.1016/j.heliyon.2021.e06550. eCollection 2021 Mar.

Eco-friendly natural extract loaded antioxidative chitosan/polyvinyl alcohol based active films for food packaging

Annu  1 , Akbar Ali  2 , Shakeel Ahmed  3   4
Affiliations

Eco-friendly natural extract loaded antioxidative chitosan/polyvinyl alcohol based active films for food packaging

Annu et al. Heliyon. .

Abstract

Nowadays, biodegradable antimicrobial packaging materials draw substantial attention and are considered one of the preferred emerging technologies to be used in the food industry. In this study, we have reported developing a two-component, chitosan (CS) and polyvinyl alcohol (PVA) based films loaded with natural extract of Ocimum tenuiflorum via solvent casting technique. Experimental results showed that all the components were well dispersed, resulting in complete homogenous films. FTIR-ATR spectral analysis indicated strong interaction between the film matrix components, which also gets reflected by the films' physical properties. Transparent biodegradable films have resulted from the mixture and incorporation of the natural agent/extracts influenced light barrier, water resistance, moisture content (9.89-9.01%), and DPPH radical scavenging properties (antioxidant value ~41.1%) of the CS/PVA films. Therefore, this natural extract containing transparent CS/PVA-based films promises to be used in the food industry as packaging material to enhance food safety.

Keywords: Chitosan; Ocimum tenuiflorum; Packaging films; Plant extract; Polyvinyl alcohol.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Optical images of PVA, CS/PVA, and CS/PVA with plant extracts films.
Figure 2
Figure 2
FTIR-ATR spectra of (a) Pure chitosan, (b) PVA, CS/PVA, and natural extract loaded CS/PVA-based films.
Figure 3
Figure 3
Mechanistic representation of possible intermolecular hydrogen bonding between CS and PVA.
Figure 4
Figure 4
Total soluble matter (TSM, %) in the films.
Figure 5
Figure 5
X-ray diffraction patterns of PVA, CS/PVA, and CS/PVA with extract films.
Figure 6
Figure 6
DPPH radical scavenging activity of PVA, CS/PVA, and CS/PVA-TL films. (Values with different superscripts are significantly different among samples, p < 0.05).
See this image and copyright information in PMC

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