期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 210, 期 -, 页码 639-653出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2022.04.220
关键词
Garlic skin; Cellulose Nanocrystals; Antibacterial
资金
- Office Cherifien des Phosphates (OCP S.A.) in the Moroccan Kingdom
- Mohammed VI Polytechnic University (UM6P)
- Materials Science, Energy and Nano-engineering Department (MSN)-UM6P
This study investigates the use of cellulose nanocrystals (CNCs) and garlic extract (GE) from garlic skin in the manufacture of biocomposite films. The films show improved UV barrier, thermal stability, mechanical properties, biodegradability, and antimicrobial activity. The addition of CNCs and GE enhances the physical characteristics and antibacterial activity of the films, making them promising for active food packaging applications.
For many years, garlic has been used as a condiment in food and traditional medicine. However, the garlic skin, which accounts for 25% of the garlic bulk, is considered agricultural waste. In this study, cellulose nanocrystals (CNCs) and garlic extract (GE) from garlic skin were isolated and used as fillers to manufacture biocomposite films. The films were characterized in terms of UV barrier, thermal, mechanical, biodegradability, and antimicrobial activity. The chitosan-containing films and CNCs have significantly improved the films' tensile strength, Young's modulus, and elongation but decreased the film transparency compared to chitosan films. The combination of the CNCs and GE, on the other hand, slightly reduced the mechanical properties. The addition of CNCs slightly decreased the film transparency, while the addition of GE significantly improved the UV barrier properties. Thermal studies revealed that the incorporation of CNC and GE had minimal effect on the thermal stability of the chitosan films. The degradability rate of the chitosan composite films was found to be higher than that of the neat chitosan films. The antimicrobial properties of films were studied against Escherichia coli, Streptomyces griseorubens, Streptomyces alboviridis, and Staphylococcus aureus, observing that their growth was considerably inhibited by the addition of GE in composite films. Films incorporating both CNCs and GE from garlic skin hold more promise for active food packaging applications due to a combination of enhanced physical characteristics and antibacterial activity.
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