Poly (α-Dodecyl γ-Glutamate) (PAAG-12) and Polylactic Acid Films Charged with α-Tocopherol and Their Antioxidant Capacity in Food Models
Abstract
:1. Introduction
2. Materials and Methods
2.1. Chemicals
2.2. Preparation of Films
2.3. Characterization of PAAG-12 Films
2.4. Preparation of Food Simulants
Estimation of Partition Coefficients and Diffusivities
2.5. Preparation of Oil-In-Water (O/W) Emulsions and Determination of Primary Oxidation
2.6. Statistical Analyses
3. Results and Discussion
3.1. PAAG-12 Synthesis and Film Preparation
3.2. PAAG-12 Film Characterization Using TGA and DSC
3.3. Food Models
3.3.1. Food Simulant
3.3.2. Primary Oxidation of O/W Emulsions Determined with Peroxide Value Assay
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Sample | Atmosphere | TGA a | ||
---|---|---|---|---|
oTd (°C) | maxTd (°C) | Rw (%) | ||
PAAG-12 | N2 | 226.4 | 325.6 | 10.2 |
Air | 229.1 | 337.4 | 0.4 | |
PAAG-12 + 5% α-tocopherol | N2 | 284.1 | 328.9 | 7.5 |
Air | 279.4 | 338.7 | 2.6 | |
α-tocopherol | N2 | 275.8 | 365.7 | 0 |
Air | 291.1 | 341.1 | 0.2 |
Polymer | Simulant | KP,f | D (m2/s) |
---|---|---|---|
PAAG-12 | EtOH 50% | 1.05 | 1.12 × 10−11 |
EtOH 95% | 0.37 | 5.58 × 10−10 | |
PLA | EtOH 50% | 0.94 | 1.11 × 10−10 |
EtOH 95% | 0.36 | 1.12 × 10−10 |
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Villasante, J.; Codina, E.; Hidalgo, G.I.; Martínez de Ilarduya, A.; Muñoz-Guerra, S.; Almajano, M.P. Poly (α-Dodecyl γ-Glutamate) (PAAG-12) and Polylactic Acid Films Charged with α-Tocopherol and Their Antioxidant Capacity in Food Models. Antioxidants 2019, 8, 284. https://doi.org/10.3390/antiox8080284
Villasante J, Codina E, Hidalgo GI, Martínez de Ilarduya A, Muñoz-Guerra S, Almajano MP. Poly (α-Dodecyl γ-Glutamate) (PAAG-12) and Polylactic Acid Films Charged with α-Tocopherol and Their Antioxidant Capacity in Food Models. Antioxidants. 2019; 8(8):284. https://doi.org/10.3390/antiox8080284
Chicago/Turabian StyleVillasante, Juliana, Eva Codina, Gádor Indra Hidalgo, Antxon Martínez de Ilarduya, Sebastián Muñoz-Guerra, and María Pilar Almajano. 2019. "Poly (α-Dodecyl γ-Glutamate) (PAAG-12) and Polylactic Acid Films Charged with α-Tocopherol and Their Antioxidant Capacity in Food Models" Antioxidants 8, no. 8: 284. https://doi.org/10.3390/antiox8080284