Effect of Ag‐containing Nano‐composite Active Packaging System on Survival of <i>Alicyclobacillus acidoterrestris</i>

Nobile, Matteo Alessandro Del; Cannarsi, M.; Altieri, Clelia; Sinigaglia, Milena; Favia, Pietro; Iacoviello, Giuseppe; D'Agostino, R.

doi:10.1111/j.1365-2621.2004.tb09899.x

Cited by 115 publications

(42 citation statements)

References 13 publications

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“…A polyethylene fi lm containing silver-polyethylene oxide reduced Alicyclobacter acidoterrestris in apple juice by approximately 2.5 log over a 4.5 day period. 20 These results indicate that silver-containing fi lms could be effective antimicrobial packaging fi lms. A number of silver compounds are already listed in the U.S. Food and Drug Administration's Inventory of Effective Food Contact Substance Notifi cations, 21 and it is possible that silver-containing chitosan fi lms can be produced that are effective and deliver silver ions in safe amounts to food surfaces.…”

Section: Packaging Technology and Sciencementioning

confidence: 95%

Antimicrobial activity of chitosan attached to ethylene copolymer films

et al. 2008

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Ethylene copolymer fi lm was coated with chitosan by attachment of the polymer to the corona-treated surface of the fi lm, and the composite fi lm was analysed for antimicrobial activity. The fi lm was active against bacteria in 0.625 mM phosphate buffer; it reduced colony counts of Escherichia coli 25922 and of Listeria monocytogenes Scott A by 5 and 2-3 log 10 , respectively after 24 h exposure. The activity of the chitosan-coated fi lm against bacteria in buffer was increased when silver ions were incorporated into the fi lms as demonstrated by complete killing of Escherichia coli O157:H7 DD3795 and the chicken exudate isolate Stenotrophomonas maltophilia within 2 h in buffer. The fi lm was active against L. monocytogenes Scott A in 0.5% buffered peptone water up to a pH of about 7.0. Tests on beef and chicken meat exudates revealed antimicrobial activity of the fi lm against Escherichia coli O157:H7 and L. monocytogenes Scott A of about 2 and 1-2 log 10 reductions in colony-forming units, respectively. The antimicrobial activity of the fi lm against L. monocytogenes Scott A was also tested on turkey breast, and a log 10 reduction of about 1.7 log 10 units after 10 days and 1.2 log 10 after 15 days at 4°C was achieved. Exposure to chitosan-coated fi lm and 350 MPa of pressure, 55°C or 1% sodium diacetate resulted in a synergistic effect.

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Section: Packaging Technology and Sciencementioning

confidence: 95%

Antimicrobial activity of chitosan attached to ethylene copolymer films

et al. 2008

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“…Studies on the antimicrobial effectiveness of polyethylenesilver nanocomposite prepared by several methods have been found in literature such as plasma depositing an Agcontaining polyethylene oxide-like coating on a polyethylene layer (Nobile et al 2004), but little attention has been paid to antimicrobial efficiency of LDPE-silver nanocomposite produced by industrially thermal processing.…”

Section: Introductionmentioning

confidence: 99%

Melt Production and Antimicrobial Efficiency of Low-Density Polyethylene (LDPE)-Silver Nanocomposite Film

Jokar

Rahman

Ibrahim

et al. 2010

Food Bioprocess Technol

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Colloidal silver nanoparticles with a size of 5.5± 1.1 nm were prepared by chemical reduction using polyethylene glycol (PEG). Silver nanoparticles were incorporated into low-density polyethylene (LDPE) by melt blending and subsequent hot pressing at 140°C to produce nanocomposite film with an average thickness of 0.7 mm. PEG was added at 5% weight of polymer as a compatibilizer agent in order to prevent agglomeration and provide uniform distribution of nanoparticles in polymer matrix. Antimicrobial activity of silver nanocomposites against Escherichia coli ATCC 13706, Staphylococcus aureus ATCC12600, and Candida albicans ATCC10231 was evaluated by semi-qualitative agar diffusion test and quantitative dynamic shake flask test. Mechanical properties of nanocomposites were not significantly different from silverfree LDPE-containing PEG films (p>0.05), and silver nanoparticles did not form chemical bonding with the polymer. LDPE-silver nanocomposite samples by more than 6.69 ppm silver nanoparticles showed considerable antimicrobial clear zone. LDPE-silver nanocomposite affected growth kinetic parameters of the examined bacteria and is more efficient on S. aureus than E. coli. Polyethylene-silver nanocomposites containing 22.64 ppm silver nanoparticles could reduce 57.8% growth rate and 23.3% maximum bacterial concentration and increase 35.8% lag time of S. aureus. This study shows the potential use of LDPE-silver nanocomposite as antimicrobial active film. Antimicrobial efficiency of silver nanocomposite depends on silver nanoparticles concentration; however, high level of silver nanoparticles may lead to weakening of mechanical properties.

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“…The introduced functional groups can be used to further reactions through covalent or noncovalent linkages with small or large molecules required for particular applications, such as biomolecular immobilization 18 and antimicrobial activity. 19 In this work, the heterogeneous surface modification of polyolefin films such as poly(vinyl chloride) (PVC), polypropylene (PP), and polyethylene (PE) was undertaken via the UV-induced photografting of acrylic acid (AA). The goal was to perform a comparative study by means of an efficient, rapid, and economical method suited to yield modified surfaces of different commercial films.…”

Section: Introductionmentioning

confidence: 99%

Surface functionalization of polyolefin films via the ultraviolet‐induced photografting of acrylic acid: Topographical characterization and ability for binding antifungal agents

Costamagna¹,

Wunderlin²,

Larrañaga³

et al. 2006

J of Applied Polymer Sci

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ABSTRACT:The photoinduced graft copolymerization of acrylic acid with ultraviolet radiation onto films of poly (vinyl chloride), polypropylene, and polyethylene was studied. Benzophenone was used as the initiator for most of the experiments performed. The percentage of grafting was determined by gravimetric measurements, and the characterization of the grafted films was carried out by chemical analysis (Fourier transform infrared spectroscopy, volumetric titration, and dye adsorption). In all samples, the grafted yield increased with the ultraviolet exposure time. High levels of grafting were obtained at room temperature. In addition, optical and atomic force microscopy allowed the topography of the modified films to be studied as a function of the reaction time. The pendant functional groups that were grafted were then used to bind antifungal agents, such as natamycin and crystal violet, and the antifungal properties of the films were demonstrated.

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Effect of Ag‐containing Nano‐composite Active Packaging System on Survival of Alicyclobacillus acidoterrestris

Cited by 115 publications

References 13 publications

Antimicrobial activity of chitosan attached to ethylene copolymer films

Antimicrobial activity of chitosan attached to ethylene copolymer films

Melt Production and Antimicrobial Efficiency of Low-Density Polyethylene (LDPE)-Silver Nanocomposite Film

Surface functionalization of polyolefin films via the ultraviolet‐induced photografting of acrylic acid: Topographical characterization and ability for binding antifungal agents

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