Bactericidal Properties of Low-Density Polyethylene (LDPE) Modified with Commercial Additives Used for Food Protection in the Food Industry

Janczak, Katarzyna; Bajer, Krzysztof; Malinowski, Rafał; Wedderburn, Lauren; Kosmalska, Daria; Królikowski, B.

doi:10.3390/environments9070084

Cited by 3 publications

(1 citation statement)

References 57 publications

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“…Film packaging is widely used in various food containers, including bags, adherable films and sealings of rigid packages, among others. Despite more biodegradable materials being available for food packaging in the market, polymers derived from petroleum, such as low‐density polyethylene (LDPE), high‐density polyethylene (HDPE), polyethylene terephthalate (PET) and polystyrene, are the most popular materials [1]. They are necessary since current biopolymers do not satisfy all the packaging functions.…”

Section: Introductionmentioning

confidence: 99%

Development of Antifungal Packaging From Low‐Density Polyethylene With Essential Oil of Oregano and Potassium Sorbate

Martínez‐Tenorio,

Ramírez‐Corona,

Jiménez‐Munguía

et al. 2024

Packag Technol Sci

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Antimicrobial low‐density polyethylene (LDPE) films were developed by adding 0%, 0.5%, 1.0%, 2.5% and 5.0% (w/w) of Mexican oregano essential oil (OEO) or potassium sorbate (PS) as a positive antifungal control to inhibit the growth of Penicillium expansum, Penicillium citrinum and Aspergillus niger in vitro. Three methods of adding OEO in LDPE were evaluated; the best OEO yield in film was achieved when OEO was incorporated after laminating (88%); otherwise, when added into cool‐melting resin, OEO lost up to 91.5% from LDPE and completely volatilized (>99%) when combined with the resin before melting. PS yields in LDPE film were > 88% when incorporated into cool‐melted resin. Antimicrobial films with 2.5% or 5.0% (w/w) OEO or PS delayed the growth of P. expansum and P. citrinum for up to 4–5 days, and for A. niger, only films with 5.0% of OEO retarded its growth for 5 days. The modified Gompertz model was used to describe mould growth response, obtaining the parameters A (maximum growth), μm (maximum growth rate) and λ (lag phase), which correctly fit the data. P. citrinum was the most sensitive mould, and A. niger was the most resistant to the tested antimicrobials. The addition of antimicrobial agents significantly (p < 0.05) impacted the physical and mechanical properties of the LDPE films, wherein thickness and puncture strength were increased, and the colour changed (reducing the transparency and promoting the yellowness). In contrast, the water vapour transmission rate was dropped only by incorporating PS.

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Section: Introductionmentioning

confidence: 99%

Development of Antifungal Packaging From Low‐Density Polyethylene With Essential Oil of Oregano and Potassium Sorbate

Martínez‐Tenorio,

Ramírez‐Corona,

Jiménez‐Munguía

et al. 2024

Packag Technol Sci

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Selected Useful Properties of Polylactide Films Containing Nisaplin and Natamax

Richert,

Dembińska,

Hejda

et al. 2024

Applied Sciences

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In this article, we present polymer materials consisting of polylactide (PLA) and nisaplin (N), as well as PLA and natamax (X). These materials were obtained using the solvent method and tested by various test methods, i.e., functional properties—water vapor permeability, light transmission, gloss, and bactericidal activity against strains E. coli (ATCC 8739P), S. aureus (ATCC 65388), and P. aeruginosa (ATCC 8739). Furthermore, analyses were conducted to evaluate their efficacy against pathogenic fungi, including A. niger, A. flavus, A. glaucus, and A. versicolor. Mutagenicity analyses were performed using the standard Ames Test with Salmonella typhimurium. The main test methods used were ISO 22196, ISO 846. The results obtained confirm the potential suitability of the films of PLA with nisaplin and natamax for applications in the food packaging industry.

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Effect of Modification with a Biocide Containing Metal Nanoparticles on Selected LDPE Properties

et al. 2023

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In this work, the physicomechanical, chemical and thermal properties of low-density polyethylene (LDPE) modified with a biocide containing metal nanoparticles: nanoAg, nanoCu, and nanoFe2O3 were examined. The presented studies, apart from the previously proven antimicrobial effectiveness, have shown that the application of the biocide in concentrations of 0.5% and 1% has the least influence on the remaining properties. In the remaining concentrations (2–5%), despite the lack of significant influence on the chemical structure, the biocide primarily influenced the strength properties and melt flow rate (MFR). Previous research showed almost 100% antimicrobiological properties against bacteria and fungi of samples with the addition of 4% biocide. For such samples, the presented studies showed a decrease in MFR by approx. 17%, tensile strength at break by approx. 45%, an increase in elongation at breaking by approx. 25%, a decrease in density >2%, no increase in water absorption, and no significant changes in the chemical structure and in thermal properties in relation to LDPE without biocide.

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Bactericidal Properties of Low-Density Polyethylene (LDPE) Modified with Commercial Additives Used for Food Protection in the Food Industry

Cited by 3 publications

References 57 publications

Development of Antifungal Packaging From Low‐Density Polyethylene With Essential Oil of Oregano and Potassium Sorbate

Development of Antifungal Packaging From Low‐Density Polyethylene With Essential Oil of Oregano and Potassium Sorbate

Selected Useful Properties of Polylactide Films Containing Nisaplin and Natamax

Effect of Modification with a Biocide Containing Metal Nanoparticles on Selected LDPE Properties

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