Characterization of biodegradable film based on zein and oleic acid added with nanocarbonate

Ribeiro, Wanessa Ximenes; Filho, José Francisco Lopes; Cortes, Mônica Souza; Tadini, Carmen C.

doi:10.1590/0103-8478cr20141391

Cited by 14 publications

(4 citation statements)

References 4 publications

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“…In this case, the values did not exceed the elongation of the control zein film. The usual trend was confirmed that a less rigid structure with lower tensile strength was associated with increased material elasticity and vice versa, which as shown by comparing Figure 1 a,b [ 12 ]. The lower plasticizing activity of thyme oil could be ascribed to phenolic–phenolic interactions between thymol molecules, which are predominant in this type of essential oil [ 8 , 12 ].…”

Section: Resultsmentioning

confidence: 67%

“…While the PEG plasticization effect was poor in pure zein films due to their low compatibility, the same plasticizer caused a more significant increase in elongation in composite films based on zein and methyl cellulose. Incorporating nanocarbonate in the concentrations from 1 to 3 wt% ensured the higher flexibility of zein oleic acid films [ 12 ].…”

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: Resultsmentioning

confidence: 67%

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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“…It has been used to develop functional biodegradable packaging [5] , packages with antimicrobial agents [6][7][8][9] , packaging for periodontal biomaterials and substrates for cell culture [10] . Studies with zein have been carried out in respect to the regeneration of osseous tissues [11] , with nanoparticles used to improve the mechanical properties of films [12,13] and edible film to increase the shelf life of pears [14] and macadamia [15] .…”

Section: Introductionmentioning

confidence: 99%

Microstructure and thermal and functional properties of biodegradable films produced using zein

et al. 2018

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Research is being conducted in an attempt to produce biodegradable packaging to replace plastic products, thereby reducing solid waste disposal. In this work, zein films were produced from vegetable oils (macadamia, olive and buriti) and from pure oleic acid. The surface of zein-based films made using oleic acid has a good lipid distribution. The high content of oleic acid produced a film with the greatest elongation at break (8.08 ± 2.71%) due to the greater homogeneity of the protein matrix. The different oils did not affect the glass transition temperature (Tg). Tg curves of films with fatty acids showed a reduction in mass at between 50 and 120 °C due to water evaporation. At 120 °C the weight loss was 3-5% and above this temperature further weight loss was observed with the highest loss being seen in the film made using pure oleic acid. In conclusion, although biodegradable films were produced using the four different oils, the film made from pure oleic acid has the best characteristics.

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“…Zein films can be obtained by processing in devices such as kneading, blowing and/or extrusion machines [7][8][9] . Plasticizers such as glycerol, polyols and fatty acids are added during the formation of zein films to improve film flexibility and manageability, since pure zein films are usually very brittle and fragile [10][11][12] . Glycerol is considered a secondary plasticizer for zein and, when used alone, its effect is limited due to its incompatibility with zein [13] .…”

Section: Introductionmentioning

confidence: 99%

Mechanical and water absorption properties and morphology of melt processed Zein/PVAl blends

et al. 2020

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Blends of zein and poly(vinyl alcohol) (PVAl) were processed in an internal mixer (150ºC, 50 rpm) for 5-8 minutes. Glycerol and oleic acid were used as plasticizers. The mixtures obtained were then compression molded and further characterized by Fourier transform infrared spectroscopy (FTIR), water-absorption experiments, mechanical tests, and scanning electron microscopy (SEM). FTIR analysis indicated the existence of hydrogen bonding interactions between zein and PVAl. Tensile tests showed that the addition of PVAl increased the flexibility of the blends. The tensile strength ranged from 1.7 to 5.7 MPa, elongation at break ranged from 2.7 to 32% and Young's modulus ranged from 433 to 7371 MPa. Water absorption at equilibrium decreased with increasing zein content, which favored a brittle behavior in the zein/PVAl. The blends were immiscible in the composition studied and the presence of voids indicated poor interfacial interaction between the polymers.

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Characterization of biodegradable film based on zein and oleic acid added with nanocarbonate

Abstract: Zein oleic acid films added with 1, 2 and 3% (w/w) of

Cited by 14 publications

References 4 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

Microstructure and thermal and functional properties of biodegradable films produced using zein

Mechanical and water absorption properties and morphology of melt processed Zein/PVAl blends

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