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Natural plant extracts as active components in chitosan-based films: A comparative study

Bajić, Marijan; Ročnik, Tina; Oberlintner, Ana; Scognamiglio, Francesca; Novak, Uroš; Likozar, Blaž; (2019) Natural plant extracts as active components in chitosan-based films: A comparative study. Food Packaging and Shelf Life , 21 , Article 100365. 10.1016/j.fpsl.2019.100365. Green open access

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Abstract

Chitosan-based films with separately incorporated plant extracts obtained from oak (Quercus robur), hop (Humulus lupulus), and brown algae (Laminaria hyperborea) were evaluated and mutually compared regarding structural, physicochemical, and antibacterial properties. Processing of chitosan and extracted raw substances led to the development of blended films with diverse physical appearances and physicochemical properties. Starting from the oak extract-containing film and ending with the algal extract-containing film, blended films shown ascending trends in moisture content (21.5% – 28.3%), total soluble matter (23.8% – 28.9%), and elongation at break (14.0% – 31.0%) as well as descending trends in tensile strength (12.7 MPa – 5.5 MPa), Young’s modulus (230.8 MPa – 19.4 MPa), and total phenolic content (9.1 mgGAE gfilm⁻¹ – 1.0 mgGAE gfilm⁻¹). The films loaded with oak and hop extracts had improved optical properties reflected in the ability to completely block the light transmittance at the wavelengths below ∼330 nm. Moreover, the same films exhibited the appearance of inhibition zones implying the antibacterial activity against Bacillus subtilis.

Type: Article
Title: Natural plant extracts as active components in chitosan-based films: A comparative study
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.fpsl.2019.100365
Publisher version: https://doi.org/10.1016/j.fpsl.2019.100365
Language: English
Keywords: Chitosan-based material film, Natural plant extract, Active food packaging, Structural and mechanical characterization, Total phenolic content, Antibacterial activity
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Biochemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10166698
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