Chitosan Films in Food Applications. Tuning Film Properties by Changing Acidic Dissolution Conditions
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Methods
2.2.1. Preparation of Chitosan Solutions and Films
2.2.2. Characterization of Chitosan Solutions
2.2.3. Characterization of Chitosan Films
3. Results
3.1. Chitosan Solutions
3.2. Chitosan Films Characterization
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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MIC (mg/L) | ||
---|---|---|
E. coli | S. aureus | |
Chitosan—Acetic acid (1:10) | 90 | 150 |
Chitosan—Lactic acid (1:10) | 160 | 160 |
Chitosan—Citric acid (1:10) | 5730 | 4580 |
Type of Acid | Acid Concentration (wt. %) | Brightness | Opacity (Abs450nmmm−1) | Contact Angle (°) |
---|---|---|---|---|
Acetic acid | 2 | 30 ± 8 ab | 1.6 ± 0.2 a | 82 ± 4 a |
5 | 35 ± 7 a | 1.2 ± 0.2 b | 84 ± 8 a | |
10 | 31 ± 4 ac | 1.4 ± 0.2 bc | 81 ± 7 a | |
Lactic acid | 2 | 28 ± 8 bc | 1.6 ± 0.3 ac | 74 ± 3 b |
5 | 25. ± 9 b | 2.4 ± 0.4 d | 81 ± 4 a | |
10 | 20.0 ± 0.5 d | 2.5 ± 0.4 d | 73 ± 6 bc | |
Citric acid | 2 | 51 ± 8 e | 1.32 ± 0.06 b | 60 ± 10 d |
5 | 15 ± 2 f | 12.8 ± 0.4 e | 70 ± 5 c | |
10 | 10 ± 3 g | 6.3 ± 0.3 f | 69 ± 10 b |
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Melro, E.; Antunes, F.E.; da Silva, G.J.; Cruz, I.; Ramos, P.E.; Carvalho, F.; Alves, L. Chitosan Films in Food Applications. Tuning Film Properties by Changing Acidic Dissolution Conditions. Polymers 2021, 13, 1. https://0-doi-org.brum.beds.ac.uk/10.3390/polym13010001
Melro E, Antunes FE, da Silva GJ, Cruz I, Ramos PE, Carvalho F, Alves L. Chitosan Films in Food Applications. Tuning Film Properties by Changing Acidic Dissolution Conditions. Polymers. 2021; 13(1):1. https://0-doi-org.brum.beds.ac.uk/10.3390/polym13010001
Chicago/Turabian StyleMelro, Elodie, Filipe E. Antunes, Gabriela J. da Silva, Inês Cruz, Philippe E. Ramos, Fátima Carvalho, and Luís Alves. 2021. "Chitosan Films in Food Applications. Tuning Film Properties by Changing Acidic Dissolution Conditions" Polymers 13, no. 1: 1. https://0-doi-org.brum.beds.ac.uk/10.3390/polym13010001