Abstract
The current study explores the formation of active eco-friendly materials capable of preventing microbial contamination using in situ ultrasonic grafting of vanillin, curcumin and a curcumin-vanillin mixture on the surfaces of carboxymethylcellulose (CMC) and chitosan films. Spectroscopic, microscopic, physical and mechanical studies revealed that the films grafted with curcumin-vanillin mixture demonstrate improved mechanical properties and higher degree of order. The bioactivity of the prepared films was tested on food model, fresh-cut melons and films with a deposited curcumin-vanillin mixture showed superior antibacterial properties. For instance, this mixture-grafted on CMC films demonstrated a total inhibition of yeast/mold proliferation during 12 days. The HR-SEM studies of the mixture-grafted films revealed the presence of crystalline structures. Cooperative crystallization effect between the curcumin (the crystal maker) and the volatile vanillin is suggested to be responsible for the observed effects. According to our knowledge, this is the first usage of co-crystallization method in surface deposition. The results point out to a general strategy of combining a crystal maker agent with a volatile active agent during in situ sonochemical deposition to form bioactive materials that can be further used for food packaging, agriculture, pharmacology and more.
Original language | English |
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Article number | 110931 |
Journal | Colloids and Surfaces B: Biointerfaces |
Volume | 190 |
DOIs | |
State | Published - Jun 2020 |
Bibliographical note
Publisher Copyright:© 2020 Elsevier B.V.
Funding
The research leading to these results has received funding from the Israeli Ministry of Health Grant No. 3-0000-99611 and contribution from the Agricultural Research Organization , The Volcani Center, Rishon Lezion, Israel .
Funders | Funder number |
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Agricultural Research Organization | |
Ministry of Health, State of Israel | 3-0000-99611 |
Keywords
- Biodegradable
- Co-crystallization
- Curcumin
- Polysaccharide
- Ultrasonic grafting
- Vanillin