Influence of Gelatin-Based Coatings Crosslinked with Phenolic Acids on PLA Film Barrier Properties

Debeaufort, Frédéric; Riondet, Julien; Brachais, Claire‐Hélène; Benbettaieb, Nasreddine

doi:10.3390/coatings12070993

Cited by 8 publications

(6 citation statements)

References 44 publications

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“…Previous studies assigned the amide A, B, I, II, and III bands of gelatin at wave numbers 3272 cm −1 , 2924 cm −1 , 1630 cm −1 , 1539 cm −1 , and 1235 cm −1 respectively. These peaks are in accordance with our results, and previous studies [ 8 , 41 ], as displayed in Figure 2 . Amide A bands overlaps with OH bands of water and makes gelatin interactions difficult to discuss in this region.…”

Section: Resultssupporting

confidence: 94%

“…Indeed, Svagan et al [ 7 ] applied thin coatings based on an organic-inorganic phase (chitosan and montmorillonite) on the PLA film that decreased the oxygen permeability by about 100 times. More recently, Debeaufort et al [ 8 ] decreased the oxygen permeability by 600 times thanks to fish gelatin based coatings, according to the relative humidity range.…”

Section: Introductionmentioning

confidence: 99%

“…Coatings can improve the PLA water vapor and oxygen barrier properties [ 7 , 8 ]. Current coatings are mainly low-cost and easily available synthetic polymers with many environmental drawbacks [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…One biopolymer used to improve the barrier properties, and maintain both the food contact compatibility and the biodegradability of the PLA packaging films, while also being a carrier of active compounds is gelatin [ 18 ]. When PLA films are coated with gelatin and the humidity is kept below 80–85%, the permeability of gases (mainly O 2 ) can be decreased up to 600 times [ 8 ]. The main drawback of this type of coating is its loss of mechanical integrity during industrial processing, which can cause breakage or coating delamination.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Surface Corona Discharge Process on Functional and Antioxidant Properties of Bio-Active Coating Applied onto PLA Films

et al. 2023

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PLA (polylactic acid) is one of the three major biopolymers available on the market for food packaging, which is both bio-based and biodegradable. However, its performance as a barrier to gases remains too weak to be used for most types of food, particularly oxygen-sensitive foods. A surface treatment, such as coating, is a potential route for improving the barrier properties and/or providing bioactive properties such as antioxidants. Gelatin-based coating is a biodegradable and food-contact-friendly solution for improving PLA properties. The initial adhesion of gelatin to the film is successful, both over time and during production, however, the coating often delaminates. Corona processing (cold air plasma) is a new tool that requires low energy and no solvents or chemicals. It has been recently applied to the food industry to modify surface properties and has the potential to significantly improve gelatin crosslinking. The effect of this process on the functional properties of the coating, and the integrity of the incorporated active compounds were investigated. Two coatings have been studied, a control fish gelatin-glycerol, and an active one containing gallic acid (GA) as a natural antioxidant. Three powers of the corona process were applied on wet coatings. In the test conditions, there were no improvements in the gelatin crosslinking, but the corona did not cause any structural changes. However, when the corona and gallic acid were combined, the oxygen permeability was significantly reduced, while free radical scavenging, reduction, and chelating properties remained unaffected or slightly improved.

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Section: Resultssupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Surface Corona Discharge Process on Functional and Antioxidant Properties of Bio-Active Coating Applied onto PLA Films

et al. 2023

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“…The surface hydrophilicity slightly decreased as a result of the cross-linking by phenolic compounds. Moreover, the mechanical properties of PLA were maintained after coating, and their barrier properties were highly improved [ 45 ].…”

Section: Benzoic Acid Derivativesmentioning

confidence: 99%

The Application of Phenolic Acids in The Obtainment of Packaging Materials Based on Polymers—A Review

Kaczmarek-Szczepańska

Grabska-Zielińska

Michalska‐Sionkowska

2023

Foods

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This article provides a summarization of present knowledge on the fabrication and characterization of polymeric food packaging materials that can be an alternative to synthetic ones. The review aimed to explore different studies related to the use of phenolic acids as cross-linkers, as well as bioactive additives, to the polymer-based materials upon their application as packaging. This article further discusses additives such as benzoic acid derivatives (sinapic acid, gallic acid, and ellagic acid) and cinnamic acid derivatives (p-coumaric acid, caffeic acid, and ferulic acid). These phenolic acids are mainly used as antibacterial, antifungal, and antioxidant agents. However, their presence also improves the physicochemical properties of materials based on polymers. Future perspectives in polymer food packaging are discussed.

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Flexible monolayer films of poly(lactic acid)/gallic acid for active food packaging: Preparation, characterization, and bioactive properties

Karamysheva,

Silva,

Facchinatto

et al. 2024

J of Applied Polymer Sci

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The design of eco‐friendly active food packaging systems based on biobased polymeric materials is a growing field of research because of the pressing concern for sustainable development. Herein, monolayer ternary thermoplastic films composed of poly(lactic acid) (PLA), gallic acid (GA, 2.5% w/w relative to PLA), and a plasticizer (poly(ethylene glycol) [PEG] or epoxidized linseed oil [ELO], 5.0 and 7.5% w/w relative to PLA) are prepared via melt‐mixing followed by compression molding. The ensuing plasticized and self‐standing PLA/GA films are translucent and have good mechanical properties (Young's modulus ~2 GPa) and welding performance. The incorporation of GA yields films with ultraviolet‐light barrier properties (transmittance below 40%, 200–400 nm), antioxidant capacity (radical scavenging activity above 94%), and antibacterial activity against the methicillin‐resistant strain of Staphylococcus aureus (minimum of 3‐log reduction colony forming units mL−1). These thermoplastic films are easily degradable via enzymatic degradation with proteinase K from Tritirachium album, reaching weight loss values of 100% after 9 days. The films plasticized with PEG present slightly better antibacterial action and enzymatic degradation, whereas those plasticized with ELO exhibit marginally higher surface hydrophobicity and thermal stability. Thus, the combination between PLA and GA yielded biobased films with bioactive properties that have potential for application in active food packaging.

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Influence of Gelatin-Based Coatings Crosslinked with Phenolic Acids on PLA Film Barrier Properties

Cited by 8 publications

References 44 publications

Influence of Surface Corona Discharge Process on Functional and Antioxidant Properties of Bio-Active Coating Applied onto PLA Films

Influence of Surface Corona Discharge Process on Functional and Antioxidant Properties of Bio-Active Coating Applied onto PLA Films

The Application of Phenolic Acids in The Obtainment of Packaging Materials Based on Polymers—A Review

Flexible monolayer films of poly(lactic acid)/gallic acid for active food packaging: Preparation, characterization, and bioactive properties

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