Films based on mixtures of zein, chitosan, and PVA: Development with perspectives for food packaging application

Bueno, Jéssica Naihara Nunes; Corradini, Elisângela; Souza, Paulo R.; Marques, Vicente de Sousa; Radovanovic, Eduardo; Muniz, Edvani C.

doi:10.1016/j.polymertesting.2021.107279

Cited by 42 publications

(12 citation statements)

References 33 publications

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“…In the unmodified zein film, a peak at 67 °C was observed, corresponding to the glass transition temperature. A similar Tg value (68 °C) for the zein film was achieved in the study by Bueno [ 33 ]. The shift of this endothermic peak in the zein film toward zein modified with thyme oil could indicate the partial miscibility of these two components [ 34 ].…”

Section: Resultssupporting

confidence: 80%

“…It is well known that pure zein films suffer from worse mechanical characteristics since they are too brittle and stiff, limiting their technological processing and application. To improve the mechanical properties, various modifications of zein films have been investigated, e.g., combinations with other polymers such as chitosan or polyvinyl alcohol [ 33 ], using a mixture of glycerol and oleic acid [ 47 ], or introducing different types of nanoparticles [ 48 ].…”

Section: Discussionmentioning

confidence: 99%

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Zein-Based Films Containing Monolaurin/Eugenol or Essential Oils with Potential for Bioactive Packaging Application

Sedlaříková

Janalíková

Peer

et al. 2021

IJMS

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Zein is renewable plant protein with valuable film-forming properties that can be used as a packaging material. It is known that the addition of natural cross-linkers can enhance a film’s tensile properties. In this study, we aimed to prepare antimicrobial zein-based films enriched with monolaurin, eugenol, oregano, and thyme essential oil. Films were prepared using the solvent casting technique from ethanol solution. Their physicochemical properties were investigated using structural, morphological, and thermal techniques. Polar and dispersive components were analyzed using two models to evaluate the effects on the surface free energy values. The antimicrobial activity was proven using a disk diffusion method and the suppression of bacterial growth was confirmed via a growth kinetics study with the Gompertz function. The films’ morphological characteristics led to systems with uniform distribution of essential oils or eugenol droplets combined with a flat-plated structure of monolaurin. A unique combination of polyphenolic eugenol and amphiphilic monoglyceride provided highly stretchable films with enhanced barrier properties and efficiency against Gram-positive and Gram-negative bacteria, yeasts, and molds. The prepared zein-based films with tunable surface properties represent an alternative to non-renewable resources with a potential application as active packaging materials.

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Section: Resultssupporting

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Zein-Based Films Containing Monolaurin/Eugenol or Essential Oils with Potential for Bioactive Packaging Application

Sedlaříková

Janalíková

Peer

et al. 2021

IJMS

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show abstract

“…The zein, chitosan and blended films produced are reported in Figure 2, with their relative morphology obtained by SEM analysis. In particular, the zein films obtained (Figure 2a) are transparent and yellow in color due to the color of the commercial zein used, and the SEM images (Figure 2d) showed an almost periodic porosity also present in the thickness of the film, as evidenced by the crosssection view (Figure 2g), probably due to the fast solvent evaporation, as also evidenced by Bueno and colleagues [27]. The chitosan films present high transparency (Figure 2b) and a very smooth and uniform surface without defects (Figure 2e).…”

Section: Morphological Characterizationsupporting

confidence: 65%

Improvement of Natural Polymeric Films Properties by Blend Formulation for Sustainable Active Food Packaging

et al. 2023

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Active packaging manufactured with biopolymers extracted from agri-food waste is one of the most innovative and eco-sustainable strategies for maintaining food quality. However, biopolymers often present poor performances, which hinders their competitiveness compared with plastics. This work focused on developing and optimizing a natural polymeric blend produced by solvent casting based on zein and chitosan to improve the pure biopolymers’ properties. The best results were obtained by blending zein and chitosan in a 1:2 weight ratio. The films were characterized in terms of morphology, mechanical and oxygen barrier properties, thermal stability, transparency and wettability. The blend production allowed us to obtain lower brittleness and lower stiffness materials compared with pure polymer films, with oxygen permeability values two orders of magnitude lower than pure zein, better optical properties with respect to pure chitosan and good thermal stability. The wettability properties of the blend did not result in being altered with respect to the single polymer, which was found to have hydrophilic behavior, highlighting the strong influence of glycerol used as a plasticizer. The results suggested that the polymer blending strategy is a viable and cost-effective method for producing packaging materials as alternatives to plastics.

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“…Even though sample 8 has a lower value of elongation than sample 6. The Bueno et al [26] study revealed that increasing PVA can increase the value of tensile strength and elongation. This may be because of the bonding between alcohol compounds from PVA and polysaccharide molecules to be solid cross-linkage chains.…”

Section: Mechanical Analysismentioning

confidence: 97%

Synthesis and Characterization of Gambas (Luffa acutangula) Peel–Based Bioplastic Reinforced by Silica

Kesuma Nirvana,

Budiyati,

Mulyaningtyas

2023

J. Kim. Sains Apl.

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Gambas (Luffa acutangula) plants contain a relatively high carbohydrate of 68.2%, whereas its peel contains 38.94% of carbohydrates and 20.6% of fibers. Gambas peels are rarely utilized and are typically discarded as food waste. Silica can be used as a filler and reinforcement material to improve the physical and mechanical properties. This study discussed synthesizing and characterizing bioplastics from Gambas peel reinforced by silica using polyvinyl alcohol (PVA) as a plasticizer with a mass of 8 g and 9 g and vinegar as a compatibilizer with volumes of 7 mL and 8 mL. The gelatinization temperature was adjusted at 85°C and 95°C. The synthesized bioplastics have improved mechanical characteristics due to the addition of PVA. The addition of vinegar as a compatibilizer revealed a homogenous mixture in surface morphological analysis. The highest performance of bioplastic samples was obtained from sample 7 with 8 mL vinegar, 9 g of PVA, and at 85°C of gelatinization temperature. The results showed that the maximum tensile strength reached 0.034 N/mm2, the elongation was 225%, the value of Young’s modulus was 0.015 N/mm2, the thermal stability reached 74.34% weight loss by heating up to 400°C, and the melting temperature reached at 220°C, the absorption of water was 37.61%, and the weight loss was 20.3% after ten days of soil burial.

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Films based on mixtures of zein, chitosan, and PVA: Development with perspectives for food packaging application

Cited by 42 publications

References 33 publications

Zein-Based Films Containing Monolaurin/Eugenol or Essential Oils with Potential for Bioactive Packaging Application

Zein-Based Films Containing Monolaurin/Eugenol or Essential Oils with Potential for Bioactive Packaging Application

Improvement of Natural Polymeric Films Properties by Blend Formulation for Sustainable Active Food Packaging

Synthesis and Characterization of Gambas (Luffa acutangula) Peel–Based Bioplastic Reinforced by Silica

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