PET and Active Coating Based on a LDH Nanofiller Hosting p-Hydroxybenzoate and Food-Grade Zeolites: Evaluation of Antimicrobial Activity of Packaging and Shelf Life of Red Meat
Abstract
:1. Introduction
2. Experimental
2.1. Materials
2.2. Methods
3. Results and Discussion
4. Concluding Remarks
Author Contributions
Funding
Conflicts of Interest
References
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Sample | fb (%) | K1 (h−1) | K2 (h−1) | t2max (h) | R2 |
---|---|---|---|---|---|
PET/active | 76 | 6.92 × 10−2 | 6.58 × 10−2 | 190 | 0.988 |
PET/Active Zeo 100 | 74 | 6.63 × 10−2 | 3.37 × 10−2 | 202 | 0.979 |
PET/Active Zeo 810 | 70 | 6.59 × 10−2 | 3.09 × 10−2 | 223 | 0.985 |
Sample | CO2 TR [g/(m2 × 24 h)] |
---|---|
PET/Active | 824 ± 15 |
PET/Active Zeo 100 | 816 ± 20 |
PET/Active Zeo 810 | 778 ± 22 |
Simulant Used | A—Ethanol at 10% | B—Acetic Acid at | D2—Vegetable Oil | Limits |
---|---|---|---|---|
(v/v) | 3% (w/v) | |||
Temperature of the test | 40 °C | 40 °C | 40 °C | |
Contact time | 10 days | 10 days | 10 days | |
Global migration | <1.0 mg/dm2 | 1.4 mg/dm2 | 7.7 mg/dm2 | 10 mg/dm2 |
p-hydroxybenzoic acid (cas 99-96-7): specific migration | 1.8 mg/kg | 2.1 mg/kg | 0.8 mg/kg | 60 mg/kg |
Gram-Negative Strain | Campylobacter jejuni—ATCC 33291 | Salmonella spp. enterica |
---|---|---|
typhimurium—ATCC | ||
14028 | ||
Sample size | 50 × 50 (mm × mm) | 50 × 50 (mm × mm) |
Sample thickness | 1.0 mm | 1.0 mm |
Inoculum volume | 0.4 mL | 0.4 mL |
Uo: number of bacteria available in the inoculum | 300 000 | 120 000 |
Ut: bacteria count recovered from non-treated samples 24 h after inoculation | 3.8 (Log) | 4.3 (Log) |
At: bacteria count recovered from samples treated 24 h after inoculation | ≤0.4 (Log) | 1.6 (Log) |
Antibacterial activity (R) | >3.8 | 2.6 |
R = (Ut − Uo) − (At − Uo) | ||
ISO 22196:2011 |
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Bugatti, V.; Vertuccio, L.; Zuppardi, F.; Vittoria, V.; Gorrasi, G. PET and Active Coating Based on a LDH Nanofiller Hosting p-Hydroxybenzoate and Food-Grade Zeolites: Evaluation of Antimicrobial Activity of Packaging and Shelf Life of Red Meat. Nanomaterials 2019, 9, 1727. https://doi.org/10.3390/nano9121727
Bugatti V, Vertuccio L, Zuppardi F, Vittoria V, Gorrasi G. PET and Active Coating Based on a LDH Nanofiller Hosting p-Hydroxybenzoate and Food-Grade Zeolites: Evaluation of Antimicrobial Activity of Packaging and Shelf Life of Red Meat. Nanomaterials. 2019; 9(12):1727. https://doi.org/10.3390/nano9121727
Chicago/Turabian StyleBugatti, Valeria, Luigi Vertuccio, Federica Zuppardi, Vittoria Vittoria, and Giuliana Gorrasi. 2019. "PET and Active Coating Based on a LDH Nanofiller Hosting p-Hydroxybenzoate and Food-Grade Zeolites: Evaluation of Antimicrobial Activity of Packaging and Shelf Life of Red Meat" Nanomaterials 9, no. 12: 1727. https://doi.org/10.3390/nano9121727