Facile In-Situ Synthesis of Nanocrystalline Celluloses-Silver Bio-nanocomposite for Chitosan Based Active Packaging | ||||
Egyptian Journal of Chemistry | ||||
Volume 66, Issue 4, April 2023, Page 335-352 PDF (1.11 MB) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/ejchem.2022.149568.6465 | ||||
View on SCiNiTO | ||||
Authors | ||||
Mona T. Al-Shemy 1; Amira M. El-Shafei2; Aly Al-Sayed 3; Abeer M. Adel1 | ||||
1National Research Centre, Cellulose and Paper Department, 33El-Bohouth St. (Former El-Tahrir St.), Dokki, P.O. 12622, Giza, Egypt. | ||||
2National Research Centre, Textile Research and Technology Institute, 33El-Bohouth St. (FormerEl-Tahrir St.), Dokki, P.O. 12622, Giza, Egypt. | ||||
3National Research Centre, Water Pollution Research Department, 33El-Bohouth St. (Former El-Tahrir St.), Dokki, P.O. 12622, Giza, Egypt. | ||||
Abstract | ||||
In the present study, three different extracted nanocrystalline cellulose (NCs) with different moieties (-COO-, SO4--, and PO4---) were used as both capping and reducing agents for biogenic fabrication of nanocrystalline cellulose-silver (NC-Ag) bio-nanocomposites via a simple, easy and green process. UV-Vis absorption spectra study over a long duration of storage indicates that all colloidal suspensions of the prepared NC-Ag bio-nanocomposites were stable. Disk-diffusion agar method demonstrated various microbial inhibition regions by the three fabricated NC-Ag bio-nanocomposites against four bacterial species: Bacillus subtilis, Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus. The results obtained by FTIR, UV-visible, XRD, and TEM also indicate the potential effects on the physicomechanical properties of chitosan film that occur after loading it with 7% (wt/wt) NC-Ag bio-nanocomposites. Remarkably, the antimicrobial efficacy of the chitosan films differed depending on the films and microorganisms tested. Likewise, the comparison of microbial reduction rates results revealed that Gram-negative bacteria and Aspergillusniger fungus were more susceptible to NC-Ag bio-nanocomposites' microbiocidal effects. Thus, these chitosan bio-nanocomposite films can be considered to have broad-spectrum microbicidal efficacy. | ||||
Keywords | ||||
Antimicrobial activity; Bio-nanocomposite; Chitosan film; Date palm sheath fibres; Eco-friendly; Nanocrystalline cellulose; silver nanoparticles | ||||
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