Preparation and characterisation of zein films obtained by electrospraying

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Abstract

© 2015 Elsevier Ltd. Electrospraying is a technique now applied for the production of food nanoparticles, nanofibres and nanocapsules, which could constitute a good alternative for the development of films. The goal of this work was to determine the electrospraying operation conditions and the zein concentration that would allow a film to be produced and also to evaluate the structural characteristics and barrier and thermal properties of films developed at different thicknesses. Results showed that films can be obtained by electrospraying, resulting possible to produce homogeneous films, without electrical arc formation during processing when using a 11.4% zein solution, an electrical voltage of 7.8-8.7kV and a distance of 1.5±0.5cm between the nozzle and the deposit plaque. Regarding the effect of the production methods (electrospraying and casting) and the film thickness on film appearance, both variables had significant effect on colour parameters, observing a more yellowish colour (b*=72.3±6.8) and lower transparency (%T=90.6±0.21) at larger thicknesses (100μm), and a smoother and more homogeneous surface (ESEM) when films were obtained by electrospraying. Water vapour permeability was only influenced by film thickness (1.51×10-08 to 3.11×10-08g/s-m-Pa) in both methodologies. The glass transition temperatures (Tg) for electrospraying and casting films were different (222°C and 231°C respectively) and higher than that of zein powder (165°C), indicating a possible change in the film structure due to the process. Under the process conditions tested in this work, electrospraying can be considered as an alternative technique to produce films.
Original languageAmerican English
Pages (from-to)1-10
Number of pages1
JournalFood Hydrocolloids
DOIs
StatePublished - 1 Jul 2015

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Zein
zein
films (materials)
Color
Nanocapsules
Nanofibers
Transition Temperature
Steam
Powders
Nanoparticles
Glass
Permeability
Hot Temperature
Food
Film thickness
Casting
electrospraying
nanocapsules
nanofibers
glass transition temperature

Cite this

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title = "Preparation and characterisation of zein films obtained by electrospraying",
abstract = "{\circledC} 2015 Elsevier Ltd. Electrospraying is a technique now applied for the production of food nanoparticles, nanofibres and nanocapsules, which could constitute a good alternative for the development of films. The goal of this work was to determine the electrospraying operation conditions and the zein concentration that would allow a film to be produced and also to evaluate the structural characteristics and barrier and thermal properties of films developed at different thicknesses. Results showed that films can be obtained by electrospraying, resulting possible to produce homogeneous films, without electrical arc formation during processing when using a 11.4{\%} zein solution, an electrical voltage of 7.8-8.7kV and a distance of 1.5±0.5cm between the nozzle and the deposit plaque. Regarding the effect of the production methods (electrospraying and casting) and the film thickness on film appearance, both variables had significant effect on colour parameters, observing a more yellowish colour (b*=72.3±6.8) and lower transparency ({\%}T=90.6±0.21) at larger thicknesses (100μm), and a smoother and more homogeneous surface (ESEM) when films were obtained by electrospraying. Water vapour permeability was only influenced by film thickness (1.51×10-08 to 3.11×10-08g/s-m-Pa) in both methodologies. The glass transition temperatures (Tg) for electrospraying and casting films were different (222°C and 231°C respectively) and higher than that of zein powder (165°C), indicating a possible change in the film structure due to the process. Under the process conditions tested in this work, electrospraying can be considered as an alternative technique to produce films.",
author = "Gaona-S{\'a}nchez, {V. A.} and G. Calder{\'o}n-Dom{\'i}nguez and E. Morales-S{\'a}nchez and Chanona-P{\'e}rez, {J. J.} and {Vel{\'a}zquez-de la Cruz}, G. and M{\'e}ndez-M{\'e}ndez, {J. V.} and E. Terr{\'e}s-Rojas and Farrera-Rebollo, {R. R.}",
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month = "7",
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TY - JOUR

T1 - Preparation and characterisation of zein films obtained by electrospraying

AU - Gaona-Sánchez, V. A.

AU - Calderón-Domínguez, G.

AU - Morales-Sánchez, E.

AU - Chanona-Pérez, J. J.

AU - Velázquez-de la Cruz, G.

AU - Méndez-Méndez, J. V.

AU - Terrés-Rojas, E.

AU - Farrera-Rebollo, R. R.

PY - 2015/7/1

Y1 - 2015/7/1

N2 - © 2015 Elsevier Ltd. Electrospraying is a technique now applied for the production of food nanoparticles, nanofibres and nanocapsules, which could constitute a good alternative for the development of films. The goal of this work was to determine the electrospraying operation conditions and the zein concentration that would allow a film to be produced and also to evaluate the structural characteristics and barrier and thermal properties of films developed at different thicknesses. Results showed that films can be obtained by electrospraying, resulting possible to produce homogeneous films, without electrical arc formation during processing when using a 11.4% zein solution, an electrical voltage of 7.8-8.7kV and a distance of 1.5±0.5cm between the nozzle and the deposit plaque. Regarding the effect of the production methods (electrospraying and casting) and the film thickness on film appearance, both variables had significant effect on colour parameters, observing a more yellowish colour (b*=72.3±6.8) and lower transparency (%T=90.6±0.21) at larger thicknesses (100μm), and a smoother and more homogeneous surface (ESEM) when films were obtained by electrospraying. Water vapour permeability was only influenced by film thickness (1.51×10-08 to 3.11×10-08g/s-m-Pa) in both methodologies. The glass transition temperatures (Tg) for electrospraying and casting films were different (222°C and 231°C respectively) and higher than that of zein powder (165°C), indicating a possible change in the film structure due to the process. Under the process conditions tested in this work, electrospraying can be considered as an alternative technique to produce films.

AB - © 2015 Elsevier Ltd. Electrospraying is a technique now applied for the production of food nanoparticles, nanofibres and nanocapsules, which could constitute a good alternative for the development of films. The goal of this work was to determine the electrospraying operation conditions and the zein concentration that would allow a film to be produced and also to evaluate the structural characteristics and barrier and thermal properties of films developed at different thicknesses. Results showed that films can be obtained by electrospraying, resulting possible to produce homogeneous films, without electrical arc formation during processing when using a 11.4% zein solution, an electrical voltage of 7.8-8.7kV and a distance of 1.5±0.5cm between the nozzle and the deposit plaque. Regarding the effect of the production methods (electrospraying and casting) and the film thickness on film appearance, both variables had significant effect on colour parameters, observing a more yellowish colour (b*=72.3±6.8) and lower transparency (%T=90.6±0.21) at larger thicknesses (100μm), and a smoother and more homogeneous surface (ESEM) when films were obtained by electrospraying. Water vapour permeability was only influenced by film thickness (1.51×10-08 to 3.11×10-08g/s-m-Pa) in both methodologies. The glass transition temperatures (Tg) for electrospraying and casting films were different (222°C and 231°C respectively) and higher than that of zein powder (165°C), indicating a possible change in the film structure due to the process. Under the process conditions tested in this work, electrospraying can be considered as an alternative technique to produce films.

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