Release kinetics and antimicrobial properties of carvacrol encapsulated in electrospun poly-(ε-caprolactone) nanofibres. Application in starch multilayer films

Tampau, Alina; González‐Martínez, Chelo; Chiralt, Amparo

doi:10.1016/j.foodhyd.2017.12.021

Cited by 104 publications

(57 citation statements)

References 36 publications

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“…The inclusion of CA in a carrier polymeric matrix could be a useful way to deliver its effects (Turek and Stintzing 2013). In this sense, previous studies reported very slow-release kinetics of these kinds of compounds from PLA films (Muller et al 2017b), whereas their encapsulation in more hydrophilic polymers (zein, chitosan, cassava, and corn starch) favours the release, providing greater effectiveness as antimicrobial agents (Fabra et al 2016;Muller et al 2017b;Tampau et al 2018).…”

Section: Introductionmentioning

confidence: 92%

“…The incorporation of the active compound in the polymer matrix modified the barrier and Fig. 1 Mechanism of aminolisation by 1,6-hexanediamine, occurring at the polylactide's surface mechanical properties of the film to a different extent, as reported by Requena et al (2018) and Tampau et al (2018) when carvacrol was incorporated into starch-polyester-blend bilayers and starch-PCL-starch multilayers, respectively.…”

Section: Introductionmentioning

confidence: 94%

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Enhancement of PLA-PVA Surface Adhesion in Bilayer Assemblies by PLA Aminolisation

Tampau

González‐Martínez

Vicente

et al. 2020

Food Bioprocess Technol

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Poly(lactic acid) (PLA) and poly(vinyl alcohol) (PVA) present complementary barrier properties, and their combination in multilayer assemblies (laminates) could provide materials with more effective barrier capacity for food packaging purposes. However, their low chemical affinity compromises adequate polymer adhesion. Surface free energy modification of thermoprocessed PLA films through treatment with 1,6-hexanediamine was used to enhance adhesion with polar PVA aqueous solutions. Treatments of 1 and 3 min increased the polar component of the solid surface tension, while treatments above 10 min provoked a corrosive effect in the films' structure. Extensibility analyses of PVA solutions loaded with carvacrol (15 wt.%) and different Tween 85 ratios on PLA-activated surfaces allowed the selection of the 1-min aminolysed surface for obtaining PLA-PVA bilayers, by casting PVA solutions on the PLA films. This study revealed that despite aminolisation enhancing the PLA surface affinity for aqueous PVA solutions, casting-obtained bilayers presented limited oxygen barrier effectiveness due to heterogeneous thickness of PVA layer in the laminates.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 94%

Enhancement of PLA-PVA Surface Adhesion in Bilayer Assemblies by PLA Aminolisation

Tampau

González‐Martínez

Vicente

et al. 2020

Food Bioprocess Technol

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“…The release of 1‐MCP was more abrupt at 60% to 90% RH. Tampau et al found that the release of antimicrobial carvacrol could be improved if it was encapsulated in electrospun poly‐(ε‐caprolactone) nanofibers. Using the electrospun nanofibers, the water permeability could be reduced in the multilayer system and control the release of the antimicrobial carvacrol.…”

Section: Resultsmentioning

confidence: 99%

Release behavior of 1‐methylcylopropene coated paper‐based shellac solution in response to stepwise humidity changes to develop novel functional packaging for fruit

et al. 2019

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1‐Methylcyclopropene (1‐MCP) has been shown to be a suitable inhibitor of ethylene production in fruit and vegetables during preservation and distribution. In this study, a 1‐MCP controlled‐release system on coated paper was produced using shellac as the coating material. The effect of humidity and temperature on the release of 1‐MCP from the coated paper was investigated using a dynamic sorption system (DVS) with stepwise humidity changes (initial 20% relative humidity (RH) for 2 h, then increased to 40%, 50%, 60%, and 80% RH for 2 h, respectively). The release rate kinetic data were simulated using an Avrami equation with a mechanism release number n of 1.26. The results showed that the dynamic release of 1‐MCP from the coated paper was mainly affected by humidity, for which the release rate constant could be correlated with moisture concentration in humid air. The highest humidity condition (80% RH) resulted in the highest apparent activation energy of 46.8 kJ/mol. The effect of 1‐MCP coated paper on apple storage was evaluated by measuring the ethylene production rate, flesh firmness, and titratable acidity (TA) of apple. Ethylene production rates of apple were significantly affected with 1‐MCP coated paper. The values were 0.22 nL/g FW/h at 50 mg of 1‐MCP powder and 44.7 nL/g FW/h at 0 mg of 1‐MCP powder after 15 days at 4°C and 15 days at 20°C. The other properties of apple such as flesh firmness and TA also indicated that 1‐MCP coated paper could delay fruit softening during storage time. Based on these results, the release of 1‐MCP could be controlled by coating paper with shellac solution and promising to produce functional packaging for fruit.

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“…15 wt.% PLA solutions (with or without 20 wt.% CA with respect to the polymer) were prepared by placing the PLA pellets in the selected solvent systems in hermetically sealed recipients and maintaining under magnetic stirring at room temperature (25 ± 1 °C) for 24 hr to ensure complete dissolution. The ratio CA–polymer was chosen on the basis of previous studies (Tampau, González‐Martínez, & Chiralt, 2018) to ensure enough load of CA in the matrix to exert its antimicrobial action when applied in the packaging films. Initially, EtAc was used in order to meet the requirements for food contact use.…”

Section: Methodsmentioning

confidence: 99%

Polylactic acid–based materials encapsulating carvacrol obtained by solvent casting and electrospinning

Tampau

González‐Martínez

Chiralt

2020

Journal of Food Science

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Polylactic acid (PLA) dissolved (15 wt.%) in ethyl acetate (EtAc): dimethyl sulfoxide (DMSO) binary systems (0:1; 1:3, and 2:3 v/v) was used as carrier to obtain carvacrol (CA)-loaded (20 wt.% with respect to PLA) matrices by electrospinning, in comparison with solvent casting. Field emission scanning electron microscopy (FESEM) observations showed that CA-loaded electrospun fibers were thinner than the CA-free ones, and their encapsulating efficiency (EE) increased when EtAc was present in the solvent. The cast films had higher EE (up to 89%) than the electrospun mats (maximum 68%). Thermogravimetric analysis and differential scanning calorimetry revealed that CA-free matrices retain more solvent than the samples with CA; this effect is being more noticeable in fibers rather than in cast films. The thermal analysis revealed stronger retention forces of CA in the fibers than in the cast material and the CA plasticizing effect in the PLA matrices, in accordance with its retained amount.

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Release kinetics and antimicrobial properties of carvacrol encapsulated in electrospun poly-(ε-caprolactone) nanofibres. Application in starch multilayer films

Abstract: Release kinetics and antimicrobial properties of carvacrol encapsulated in electrospun poly-(ε-caprolactone) nanofibres. Application in starch multilayer films.

Cited by 104 publications

References 36 publications

Enhancement of PLA-PVA Surface Adhesion in Bilayer Assemblies by PLA Aminolisation

Enhancement of PLA-PVA Surface Adhesion in Bilayer Assemblies by PLA Aminolisation

Release behavior of 1‐methylcylopropene coated paper‐based shellac solution in response to stepwise humidity changes to develop novel functional packaging for fruit

Polylactic acid–based materials encapsulating carvacrol obtained by solvent casting and electrospinning

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