2022
DOI: 10.1007/s12649-022-01710-3
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Characterisation and Antibacterial Properties of Novel Biodegradable Films Based on Alginate and Roselle (Hibiscus sabdariffa L.) Extract

Abstract: Composite films were prepared with alginate and roselle extract (HE) at different concentrations (1%, 3%, and 5% w/v) via solvent casting technique and analyzed in terms of physical, mechanical, and antibacterial properties. The incorporation of HE into alginate films resulted in rough and heterogeneous surface characteristics with increasing concentrations of HE. The thickness and water vapor permeability of alginate–HE composite films were significantly higher ( p < 0.05) compared to p… Show more

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Cited by 19 publications
(6 citation statements)
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References 60 publications
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“…Guava leaf extract possesses antioxidant and antibacterial activities and authors showed its incorporation into sodium alginate films enhanced tensile strength, and antioxidant and antimicrobial activity of the films ( Luo et al, 2019 ). Apart from the above studies, authors have incorporated various plant extracts in alginate films, such as Hypericum perforatum extract for wound healing ( Mutlu et al, 2022 ) and roselle extract with good antibacterial activity with more pronounced effects on Gram-positive bacteria with increasing concentrations of the extract ( Aydin and Zorlu, 2022 ).…”
Section: Introductionmentioning
confidence: 99%
“…Guava leaf extract possesses antioxidant and antibacterial activities and authors showed its incorporation into sodium alginate films enhanced tensile strength, and antioxidant and antimicrobial activity of the films ( Luo et al, 2019 ). Apart from the above studies, authors have incorporated various plant extracts in alginate films, such as Hypericum perforatum extract for wound healing ( Mutlu et al, 2022 ) and roselle extract with good antibacterial activity with more pronounced effects on Gram-positive bacteria with increasing concentrations of the extract ( Aydin and Zorlu, 2022 ).…”
Section: Introductionmentioning
confidence: 99%
“…In the FTIR spectra (Figure 4), the broad band around 3300 cm –1 (present in both the film and its components) is linked to OH stretching vibrations of OH groups (Lozano‐Vazquez et al, 2021). The band at 1592 cm −1 in alginate is ascribed to asymmetric stretching of —COO − (Aydin & Zorlu, 2022; Wang et al, 2016), and was shifted to a higher wavenumber in the film, due to the interference of the C=C stretching band of aromatic rings of phenolic groups in guacamole around 1600 cm −1 (Dhaouadi et al, 2021). The band from symmetric stretching of—COO − at 1405 cm −1 (Wang et al, 2016) also presented a shift in the film, which is due to the interference by the CH 2 bending of lipids in guacamole at around 1420 cm −1 (Qiu et al, 2020).…”
Section: Resultsmentioning
confidence: 99%
“…According to Thakur et al [ 71 ], mechanical characteristics of films may be improved by the interaction between gelatin, NaAlg, and polyphenols of plant extracts. In fact, polyphenols of natural extracts can create links with the polymer matrix’s constituents through covalent and non-covalent bindings [ 72 , 73 ].…”
Section: Resultsmentioning
confidence: 99%
“…These results enabled us to know that these films are biodegradable under environmental conditions. Due to its outstanding film-forming abilities and high biodegradability, gelatin has been frequently used [ 73 ]. In addition, Daei et al [ 49 ] reported that the addition of beetroot extract could reduce the biodegradability time.…”
Section: Resultsmentioning
confidence: 99%