Active Flexible Films for Food Packaging: A Review

Azevedo, Gabriela; Barros, Carolina; Miranda, Sónia; Machado, A. V.; Castro, Olga; Silva, Bruno; Saraiva, Margarida; Sanches-Silva, A.; Pastrana, Lorenzo; Carneiro, O. S.; Cerqueira, Miguel A.

doi:10.3390/polym14122442

Cited by 44 publications

(21 citation statements)

References 88 publications

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“…Since this technology omits the stage of adding anything directly into the food, it is convenient and satisfactory from both the manufacturer’s and consumer’s perspectives. Active packaging films have been employed successfully in the packaging of food products such as meat and fish products, dairy products, vegetables, bread and bakery products, etc., [ 47 ].…”

Section: Fundamentals Of Active Packagingmentioning

confidence: 99%

Colloidal Solutions as Advanced Coatings for Active Packaging Development: Focus on PLA Systems

et al. 2023

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Due to rising consumer demand the food packaging industry is turning increasingly to packaging materials that offer active functions. This is achieved by incorporating active compounds into the basic packaging materials. However, it is currently believed that adding active compounds as a coating over the base packaging material is more beneficial than adding them in bulk or in pouches, as this helps to maintain the physicochemical properties of the base material along with higher efficiency at the interface with the food. Colloidal systems have the potential to be used as active coatings, while the application of coatings in the form of colloidal dispersions allows for prolonged and controlled release of the active ingredient and uniform distribution, due to their colloidal/nano size and large surface area ratio. The objective of this review is to analyse some of the different colloidal solutions previously used in the literature as coatings for active food packaging and their advantages. The focus is on natural bio-based substances and packaging materials such as PLA, due to consumer awareness and environmental and regulatory issues. The antiviral concept through the surface is also discussed briefly, as it is an important strategy in the context of the current pandemic crisis and cross-infection prevention.

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Section: Fundamentals Of Active Packagingmentioning

confidence: 99%

Colloidal Solutions as Advanced Coatings for Active Packaging Development: Focus on PLA Systems

et al. 2023

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“…In recent years, extensive research on active food packaging has aimed to provide new materials to maintain microbial food integrity beyond traditional packaging systems ( Norrrahim et al, 2021 ). However, many active food packaging strategies are still in their infancy, demand complex functionalization and therefore can only address single steps in the food supply chain ( Azevedo et al, 2022 ). In contrast, the sources of microbial contaminants are manifold and may occur in all steps of food production, transportation, storage and preparation.…”

Section: Introductionmentioning

confidence: 99%

Fiber-based food packaging materials in view of bacterial growth and survival capacities

et al. 2023

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Understanding interactions of bacteria with fiber-based packaging materials is fundamental for appropriate food packaging. We propose a laboratory model to evaluate microbial growth and survival in liquid media solely consisting of packaging materials with different fiber types. We evaluated food contaminating species (Escherichia coli, Staphylococcus aureus, Bacillus cereus), two packaging material isolates and bacterial endospores for their growth abilities. Growth capacities differed substantially between the samples as well as between bacterial strains. Growth and survival were strongest for the packaging material entirely made of recycled fibers (secondary food packaging) with up to 10.8 log10 CFU/ml for the packaging isolates. Among the food contaminating species, B. cereus and E. coli could grow in the sample of entirely recycled fibers with maxima of 6.1 log10 and 8.6 log10 CFU/mL, respectively. Escherichia coli was the only species that was able to grow in bleached fresh fibers up to 7.0 log10 CFU/mL. Staphylococcus aureus perished in all samples and was undetectable after 1–6 days after inoculation, depending on the sample. The packaging material strains were isolated from recycled fibers and could grow only in samples containing recycled fibers, indicating an adaption to this environment. Spores germinated only in the completely recycled sample. Additionally, microbial digestion of cellulose and xylan might not be a crucial factor for growth. This is the first study describing bacterial growth in food packaging materials itself and proposing functionalization strategies toward active food packaging through pH-lowering.

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“…Several literature studies have reported the fabrication of antimicrobial and antibacterial polymer films. 3,4 In this area, Zeolite-supported silver-based technologies as antimicrobial agents are widely recognized. 5,6 These technologies have gained significant attention due to their effectiveness in controlling microbial growth and their potential application in various fields.…”

Section: Introductionmentioning

confidence: 99%

“…Several literature studies have reported the fabrication of antimicrobial and antibacterial polymer films 3,4 . In this area, Zeolite‐supported silver‐based technologies as antimicrobial agents are widely recognized 5,6 .…”

Section: Introductionmentioning

confidence: 99%

Mechanism of a novel antibacterial polymeric film with freshness‐retentive and hygiene‐keeping functions

Hong,

Shijo,

Narita

2023

SPE Polymers

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The growing concerns surrounding food loss and waste, coupled with the amplified need for effective antimicrobial technologies due to the COVID‐19 pandemic have highlighted the significance of antimicrobial solutions. This study introduces novel polymer‐based antibacterial films to address such challenges by combining antibacterial properties with durability. Using stearyldiethanolamine (C18DEA) as the active ingredient, the polyethylene‐based (PE) film is designed to prevent bacterial growth on its surface. The present study investigated the antibacterial mechanism, durability, and effectiveness of the films against representative gram‐positive and gram‐negative bacterial strains. The films developed in this study demonstrated notable durability against high water temperatures and harsh light exposure for preserving its antibacterial function on the tested bacteria from both representative groups. Scanning electron microscopy (SEM) analysis of bacteria in contact with film surface revealed damages to cellular structure leading to cell lysis even at the lower tested concentration of 800 ppm C18DEA in the film. Our proposed bactericidal mechanism suggests the alkyl chain of C18DEA disrupts bacterial cell membranes, leading to irreversible damage and cell death. Overall, the films hold significant promise for diverse applications, including extended shelf life for perishable foods and enhanced hygiene management, driven by their durability and potent antimicrobial effects.Highlights Mechanism of action of a PE film with C18DEA as active ingredient was studied. Broad‐spectrum bactericidal effect on gram‐positive and gram‐negative bacteria. Films demonstrated resistance to high water temperatures and light exposure. Study highlights the films' application in hygiene, safety, and food preservation.

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Active Flexible Films for Food Packaging: A Review

Cited by 44 publications

References 88 publications

Colloidal Solutions as Advanced Coatings for Active Packaging Development: Focus on PLA Systems

Colloidal Solutions as Advanced Coatings for Active Packaging Development: Focus on PLA Systems

Fiber-based food packaging materials in view of bacterial growth and survival capacities

Mechanism of a novel antibacterial polymeric film with freshness‐retentive and hygiene‐keeping functions

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