Processing and characterization of antimicrobial bioplastic films based on green microalgae Scenedesmus obliquus extract-loaded polyurethane.

Autor: Abdo SM; Water Pollution Research Department, National Research Centre, 33 El Bohouth St. (Former El Tahrir St.), P.O. 12622, Dokki, Giza, Egypt. Electronic address: sayedamohammed2015@gmail.com., Youssef M; Water Pollution Research Department, National Research Centre, 33 El Bohouth St. (Former El Tahrir St.), P.O. 12622, Dokki, Giza, Egypt., El Nagar I; Packaging Materials Department, National Research Centre, 33 El Bohouth St. (Former El Tahrir St.), P.O. 12622, Dokki, Giza, Egypt., Mohamed HE; Water Pollution Research Department, National Research Centre, 33 El Bohouth St. (Former El Tahrir St.), P.O. 12622, Dokki, Giza, Egypt., El-Kholy SA; Chemistry Department, Faculty of Science, Menoufia University, Shebin El Koom 32511, Egypt., Youssef AM; Packaging Materials Department, National Research Centre, 33 El Bohouth St. (Former El Tahrir St.), P.O. 12622, Dokki, Giza, Egypt.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2024 Feb; Vol. 257 (Pt 2), pp. 128711. Date of Electronic Publication: 2023 Dec 12.
DOI: 10.1016/j.ijbiomac.2023.128711
Abstrakt: The green microalga Scenedesmus obliquus, isolated from the Egyptian environment, was used for the synthesis of bio-based plastic materials. Polyurethane (PU) was blended with different proportions (0%, 10%, 20%, and 40%) of chloroform extract to form bioplastic films. The bioplastic films were characterized using water vapor transmission rate measurements and scanning electron microscopy (SEM). The WVTR of pure PU was 193.37 g/m 2 . day, while the values of algae/PU films were 129.74, 122.56, and 99.75 g/m 2 .day. S. obliquus reported having Palmitic, which possesses antimicrobial activity and acts as an effective antimicrobial agent in the synthesized bioplastic films. Antimicrobial activity of the algal extract and the synthesized bioplastic films were tested against two Gram-positive bacteria; Staphylococcus aureus, Enterococcus faecalis, two Gram-negative bacteria; Escherichia coli, Pseudomonas aeruginosa, and Candida albicans as a model for fungi. The results indicated that S. obliquus extract exhibited a clear antimicrobial activity against all tested microbes. The antimicrobial rate of bioplastic films containing 40% of the extract reached 100% after 2 h of contact with E. coli and E. faecalis. In conclusion, this study offers a promising future for the use of biodegradable antimicrobial bioplastic films as an affordable and environmentally friendly alternative to plastics in many applications.
Competing Interests: Declaration of competing interest The authors confirm that they have no known financial or personal conflicts that could have influenced the work presented in this study.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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