Polypropylene/Montmorillonite Nanocomposites Containing Nisin as Antimicrobial Food Packaging

Meira, Stela Maris Meister; Zehetmeyer, Gislene; Jardim, Arthur Izé; Scheibel, Jóice Maria; Oliveira, Ricardo Vinícius Bof de; Brandelli, Adriano

doi:10.1007/s11947-014-1335-5

Cited by 46 publications

(28 citation statements)

References 28 publications

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“…Table 1 shows the -spacing of 001 ( 001 ) for MMT as calculated by Bragg's equation [25]. Ag-MMT features a larger basal spacing (1.381 nm) than MMT (1.258 nm), indicating that Ag + was exchanged in the silicate layers.…”

Section: Structure and Morphologymentioning

confidence: 99%

Antimicrobial Nanocomposites Prepared from Montmorillonite/Ag⁺/Quaternary Ammonium Nitrate

Zhang

Chen

et al. 2018

Journal of Nanomaterials

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Nanocomposites of Ag with organic montmorillonite (Ag-OMMT), Ag with montmorillonite (Ag-MMT), and organic montmorillonite (OMMT) were successfully prepared via a one-step solution-intercalated method. Sodium MMT, silver nitrate, and dimethyl octadecyl hydroxy ethyl ammonium nitrate were used as precursors. X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, and energy dispersive spectroscopy analyses confirmed that the MMT layers were intercalated, and Ag + was partly reduced to silver nanoparticles with diameters within 10-20 nm in Ag-OMMT. The decomposition temperature of the organic cations in OMMT and Ag-OMMT increased to 220 ∘ C, as revealed by differential scanning calorimetrythermogravimetric analysis. The antimicrobial activity of the nanocomposites was tested by measuring the minimum inhibitory concentration (MIC) and killing rate. The MICs of Ag-OMMT against Staphylococcus aureus, Escherichia coli, and Candida albicans were 0.313, 2.5, and 0.625 mg/mL, respectively. Because of the presence of quaternary ammonium nitrate, Ag-OMMT has a better MIC against Gram-positive bacteria compared to Gram-negative bacteria and fungi. OMMT did not show antimicrobial activity against Escherichia coli and Candida albicans. In 2 h, 0.0125 mg/mL Ag-OMMT could kill 100% of S. aureus, E. coli, and C. albicans in solution, and Ag-MMT could kill 99.995% of S. aureus, 90.15% of E. coli, and 93.68% of C. albicans. These antimicrobial functional nanocomposites have the potential for application in the area of surface decoration films.

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Section: Structure and Morphologymentioning

confidence: 99%

Antimicrobial Nanocomposites Prepared from Montmorillonite/Ag⁺/Quaternary Ammonium Nitrate

Zhang

Chen

et al. 2018

Journal of Nanomaterials

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“…Nisin is recognized as a safe additive by the FDA and is approved as a natural antimicrobial agent for food used in more than 50 countries . In addition, it is a heat stable antimicrobial peptide, non‐toxic, sensitive to digestive proteases, and does not contribute to off‐flavor . Its small molecular size allows the production of films that release the peptide once it is in contact with a liquid or solid food .…”

Section: Introductionmentioning

confidence: 99%

Influence of melt processing on biodegradable nisin‐PBAT films intended for active food packaging applications

Zehetmeyer

Meira

Scheibel

et al. 2015

J of Applied Polymer Sci

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Biodegradable poly(butylene adipate-co-terephthalate) (PBAT) films incorporated with different levels of the antimicrobial peptide nisin were developed by melt processing. Structural, morphological, thermal, mechanical, and antimicrobial properties of the films were determined. The X-ray diffraction patterns exhibited decreasing levels of intensity at 2h values as the concentration of nisin increased. Scanning electron microscopy showed a heterogeneous morphology when higher amounts of nisin were incorporated. The antimicrobial films tested presented no significant differences in the melting temperature (123-1258C), and the crystallization temperature ranged from 69 to 758C. The addition of nisin caused no significant modification in tensile strength values. However, results of Young's modulus and deformation at break differed significantly among samples. Active films demonstrated inhibition against the Gram-positive bacterium Listeria monocytogenes. These results demonstrated that PBAT/nisin films produced by melt processing present a great potential for use as active food packaging materials aiming enhanced food safety. V C 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43212.

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“…Soy-based films impregnated with nisin and lauric acid reduced up to 6 log units the L. monocytogenes concentration on turkey bologna after 21 days at 4°C (Dawson et al 2002), while the immobilization of nisin on polyamide and cellulose lowered S. aureus concentration in Cheddar cheese (Scannell et al 2000a) and in cheese slices under cold conditions for 3 months (Scannell et al 2000b). Going further in the antimicrobial active packaging concept, nisin has also been incorporated (1-2 %) into polypropylene/montmorillonite nanocomposites to make packaging food material and inhibited L. monocytogenes, S. aureus and C. perfringens when tested on skimmed milk agar plates, thereby having a great potential to reduce post-process growth of food pathogens (Meira et al 2014).…”

Section: Preservation Of Food Productsmentioning

confidence: 99%

Antimicrobial Peptides Produced by Bacteria: The Bacteriocins

Martínez

Rodrı́guez

Suárez

2016

New Weapons to Control Bacterial Growth

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Bacteriocins are the subset of antimicrobial peptides (AMPs) produced by bacteria. They are small amphipathic peptides that interact with bacterial membranes leading to cell death. Most of the best known are produced by lactic acid bacteria used as food fermentation starters, because of their potential use as food preservatives. Bacteriocins are divided into two groups: lantibiotics that present posttranslational condensation rings and unmodified peptides. The first are subdivided into elongated versus globular lantibiotics, while four subgroups are recognized among unmodified bacteriocins. The genetic organization is in clusters that may reside into plasmids or transposons, formed by the structural gene, the export and immunity determinants, the quorum sensing governing production and any modification genes. Bacteriocins are active at extremely low concentrations (nM range) due to a dual mode of action: (a) binding to the membrane phospholipids and (b) specific recognition of surface components, both of which collaborate in pore formation. Development of resistance to bacteriocins is very infrequent due to the presence of two targets and is usually due to unspecific modifications of the cell envelope. Bacteriocins are used as food preservatives, either after total or partial purification or as extracts of producing bacteria. In situ production is also used, with the advantage of producing early lysis of the starter bacteria and ripening acceleration of the fermented product. They may also form part of hurdle technologies and be incorporated into packaging systems to allow extended liberation. Medical and veterinary applications are in their infancy but good results have been obtained against infection by Gram-positive bacteria and Helicobacter pylori.

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Polypropylene/Montmorillonite Nanocomposites Containing Nisin as Antimicrobial Food Packaging

Cited by 46 publications

References 28 publications

Antimicrobial Nanocomposites Prepared from Montmorillonite/Ag⁺/Quaternary Ammonium Nitrate

Antimicrobial Nanocomposites Prepared from Montmorillonite/Ag⁺/Quaternary Ammonium Nitrate

Influence of melt processing on biodegradable nisin‐PBAT films intended for active food packaging applications

Antimicrobial Peptides Produced by Bacteria: The Bacteriocins

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Polypropylene/Montmorillonite Nanocomposites Containing Nisin as Antimicrobial Food Packaging

Cited by 46 publications

References 28 publications

Antimicrobial Nanocomposites Prepared from Montmorillonite/Ag+/Quaternary Ammonium Nitrate

Antimicrobial Nanocomposites Prepared from Montmorillonite/Ag+/Quaternary Ammonium Nitrate

Influence of melt processing on biodegradable nisin‐PBAT films intended for active food packaging applications

Antimicrobial Peptides Produced by Bacteria: The Bacteriocins

Contact Info

Product

Resources

About

Antimicrobial Nanocomposites Prepared from Montmorillonite/Ag⁺/Quaternary Ammonium Nitrate

Antimicrobial Nanocomposites Prepared from Montmorillonite/Ag⁺/Quaternary Ammonium Nitrate