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Stefano Farris - One of the best experts on this subject based on the ideXlab platform.
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Transparent Pullulan/Mica Nanocomposite Coatings with Outstanding Oxygen Barrier Properties
Nanomaterials, 2017Co-Authors: Ilke Uysal Unalan, Silvia Trabattoni, Silvia Tavazzi, Derya Boyacı, Stefano FarrisAbstract:This study presents a new bionanocomposite coating on poly(ethylene terephthalate) (PET) made of pullulan and synthetic mica. Mica nanolayers have a very high aspect ratio (α), at levels much greater than that of conventional exfoliated clay layers (e.g., montmorillonite). A very small amount of mica (0.02 wt %, which is ϕ ≈ 0.00008) in pullulan coatings dramatically improved the Oxygen Barrier performance of the nanocomposite films under dry conditions, however, this performance was partly lost as the environmental relative humidity (RH) increased. This outcome was explained in terms of the perturbation of the spatial ordering of mica sheets within the main pullulan phase, because of RH fluctuations. This was confirmed by modelling of the experimental Oxygen transmission rate (OTR) data according to Cussler’s model. The presence of the synthetic nanobuilding block (NBB) led to a decrease in both static and kinetic coefficients of friction, compared with neat PET (≈12% and 23%, respectively) and PET coated with unloaded pullulan (≈26% reduction in both coefficients). In spite of the presence of the filler, all of the coating formulations did not significantly impair the overall optical properties of the final material, which exhibited haze values below 3% and transmittance above 85%. The only exception to this was represented by the formulation with the highest loading of mica (1.5 wt %, which is ϕ ≈ 0.01). These findings revealed, for the first time, the potential of the NBB mica to produce nanocomposite coatings in combination with biopolymers for the generation of new functional features, such as transparent high Oxygen Barrier materials.
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Transparent Pullulan/Mica Nanocomposite Coatings with Outstanding Oxygen Barrier Properties
2017Co-Authors: Ilke Uysal Unalan, Silvia Trabattoni, Silvia Tavazzi, Derya Boyacı, Stefano FarrisAbstract:This study presents a new bionanocomposite coating on poly(ethylene terephthalate) (PET) made of pullulan and synthetic mica. Mica nanolayers have a very high aspect ratio (α) at levels much greater than that of conventional exfoliated clay layers (e.g., montmorillonite). A very small amount of mica (0.02 wt%, which is ϕ ≈ 0.00008) in pullulan coatings dramatically improved the Oxygen Barrier performance of the nanocomposite films under dry conditions, whereas this performance was partly lost as the environmental relative humidity (RH) increased. This outcome was explained in terms of the perturbation of the spatial ordering of mica sheets within the main pullulan phase because of RH fluctuations, as confirmed by modelling of the experimental OTR data according to Cussler’s model. The presence of the synthetic nanobuilding block (NBB) led to a decrease in both static and kinetic coefficients of friction compared with neat PET (≈12% and 23%, respectively) and PET coated with unloaded pullulan (≈ 26% reduction in both coefficients). In spite of the presence of the filler, all of the coating formulations did not significantly impair the overall optical properties of the final material, which exhibited haze values below 3% and transmittance above 85%, with the only exception represented by the formulation with the highest loading of mica (1.5 wt%, which is ϕ ≈ 0.01). These findings revealed, for the first time, the potential of the NBB mica to produce nanocomposite coatings in combination with biopolymers for the generation of new functional features, such as transparent high Oxygen Barrier materials.
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Graphene Oxide Bionanocomposite Coatings with High Oxygen Barrier Properties
Nanomaterials, 2016Co-Authors: Ilke Uysal Unalan, Silvia Trabattoni, Derya Boyacı, Masoud Ghaani, Stefano FarrisAbstract:In this work, we present the development of bionanocomposite coatings on poly(ethylene terephthalate) (PET) with outstanding Oxygen Barrier properties. Pullulan and graphene oxide (GO) were used as main polymer phase and nanobuilding block (NBB), respectively. The Oxygen Barrier performance was investigated at different filler volume fractions (ϕ) and as a function of different relative humidity (RH) values. Noticeably, the impermeable nature of GO was reflected under dry conditions, in which an Oxygen transmission rate (OTR, mL·m−2·24 h−1) value below the detection limit of the instrument (0.01 mL·m−2·24 h−1) was recorded, even for ϕ as low as 0.0004. A dramatic increase of the OTR values occurred in humid conditions, such that the Barrier performance was totally lost at 90% RH (the OTR of coated PET films was equal to the OTR of bare PET films). Modelling of the experimental OTR data by Cussler’s model suggested that the spatial ordering of GO sheets within the main pullulan phase was perturbed because of RH fluctuations. In spite of the presence of the filler, all the formulations allowed the obtainment of final materials with haze values below 3%, the only exception being the formulation with the highest loading of GO (ϕ ≈ 0.03). The mechanisms underlying the experimental observations are discussed.
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Exceptional Oxygen Barrier performance of pullulan nanocomposites with ultra-low loading of graphene oxide
Nanotechnology, 2015Co-Authors: Ilke Uysal Unalan, Silvia Trabattoni, Chaoying Wan, Łukasz Figiel, Richard T. Olsson, Stefano FarrisAbstract:Polymer nanocomposites are increasingly important in food packaging sectors. Biopolymer pullulan is promising in manufacturing packaging films or coatings due to its excellent optical clarity, mechanical strength, and high water-solubility as compared to other biopolymers. This work aims to enhance its Oxygen Barrier properties and overcome its intrinsic brittleness by utilizing two-dimensional planar graphene oxide (GO) nanoplatelets. It has been found that the addition of only 0.2 wt% of GO enhanced the tensile strength, Young's modulus, and elongation at break of pullulan films by about 40, 44 and 52%, respectively. The light transmittance at 550 nm of the pullulan/GO films was 92.3% and haze values were within 3.0% threshold, which meets the general requirement for food packaging materials. In particular, the Oxygen permeability coefficient of pullulan was reduced from 6337 to 2614 mL μm m−2 (24 h−1) atm−1 with as low as 0.05 wt% of GO loading and further to 1357 mL μm m−2 (24 h−1) atm−1 when GO concentration reached 0.3 wt%. The simultaneous improvement of the mechanical and Oxygen Barrier properties of pullulan was ascribed to the homogeneous distribution and prevalent unidirectional alignment of GO nanosheets, as determined from the characterization and theoretical modelling results. The exceptional Oxygen Barrier properties of pullulan/GO nanocomposites with enhanced mechanical flexibility and good optical clarity will add new values to high performance food packaging materials.
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Ultrasound-assisted pullulan/montmorillonite bionanocomposite coating with high Oxygen Barrier properties.
Langmuir, 2012Co-Authors: Laura Introzzi, Thomas O. J. Blomfeldt, Silvia Trabattoni, Silvia Tavazzi, Nadia Santo, Alberto Schiraldi, Luciano Piergiovanni, Stefano FarrisAbstract:In this paper, the preparation and characterization of Oxygen Barrier pullulan sodium montmorillonite (Na+-MMT) nanocomposite coatings are presented for the first time. Full exfoliation of platelet ...
Silvia Trabattoni - One of the best experts on this subject based on the ideXlab platform.
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Transparent Pullulan/Mica Nanocomposite Coatings with Outstanding Oxygen Barrier Properties
Nanomaterials, 2017Co-Authors: Ilke Uysal Unalan, Silvia Trabattoni, Silvia Tavazzi, Derya Boyacı, Stefano FarrisAbstract:This study presents a new bionanocomposite coating on poly(ethylene terephthalate) (PET) made of pullulan and synthetic mica. Mica nanolayers have a very high aspect ratio (α), at levels much greater than that of conventional exfoliated clay layers (e.g., montmorillonite). A very small amount of mica (0.02 wt %, which is ϕ ≈ 0.00008) in pullulan coatings dramatically improved the Oxygen Barrier performance of the nanocomposite films under dry conditions, however, this performance was partly lost as the environmental relative humidity (RH) increased. This outcome was explained in terms of the perturbation of the spatial ordering of mica sheets within the main pullulan phase, because of RH fluctuations. This was confirmed by modelling of the experimental Oxygen transmission rate (OTR) data according to Cussler’s model. The presence of the synthetic nanobuilding block (NBB) led to a decrease in both static and kinetic coefficients of friction, compared with neat PET (≈12% and 23%, respectively) and PET coated with unloaded pullulan (≈26% reduction in both coefficients). In spite of the presence of the filler, all of the coating formulations did not significantly impair the overall optical properties of the final material, which exhibited haze values below 3% and transmittance above 85%. The only exception to this was represented by the formulation with the highest loading of mica (1.5 wt %, which is ϕ ≈ 0.01). These findings revealed, for the first time, the potential of the NBB mica to produce nanocomposite coatings in combination with biopolymers for the generation of new functional features, such as transparent high Oxygen Barrier materials.
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Transparent Pullulan/Mica Nanocomposite Coatings with Outstanding Oxygen Barrier Properties
2017Co-Authors: Ilke Uysal Unalan, Silvia Trabattoni, Silvia Tavazzi, Derya Boyacı, Stefano FarrisAbstract:This study presents a new bionanocomposite coating on poly(ethylene terephthalate) (PET) made of pullulan and synthetic mica. Mica nanolayers have a very high aspect ratio (α) at levels much greater than that of conventional exfoliated clay layers (e.g., montmorillonite). A very small amount of mica (0.02 wt%, which is ϕ ≈ 0.00008) in pullulan coatings dramatically improved the Oxygen Barrier performance of the nanocomposite films under dry conditions, whereas this performance was partly lost as the environmental relative humidity (RH) increased. This outcome was explained in terms of the perturbation of the spatial ordering of mica sheets within the main pullulan phase because of RH fluctuations, as confirmed by modelling of the experimental OTR data according to Cussler’s model. The presence of the synthetic nanobuilding block (NBB) led to a decrease in both static and kinetic coefficients of friction compared with neat PET (≈12% and 23%, respectively) and PET coated with unloaded pullulan (≈ 26% reduction in both coefficients). In spite of the presence of the filler, all of the coating formulations did not significantly impair the overall optical properties of the final material, which exhibited haze values below 3% and transmittance above 85%, with the only exception represented by the formulation with the highest loading of mica (1.5 wt%, which is ϕ ≈ 0.01). These findings revealed, for the first time, the potential of the NBB mica to produce nanocomposite coatings in combination with biopolymers for the generation of new functional features, such as transparent high Oxygen Barrier materials.
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Graphene Oxide Bionanocomposite Coatings with High Oxygen Barrier Properties
Nanomaterials, 2016Co-Authors: Ilke Uysal Unalan, Silvia Trabattoni, Derya Boyacı, Masoud Ghaani, Stefano FarrisAbstract:In this work, we present the development of bionanocomposite coatings on poly(ethylene terephthalate) (PET) with outstanding Oxygen Barrier properties. Pullulan and graphene oxide (GO) were used as main polymer phase and nanobuilding block (NBB), respectively. The Oxygen Barrier performance was investigated at different filler volume fractions (ϕ) and as a function of different relative humidity (RH) values. Noticeably, the impermeable nature of GO was reflected under dry conditions, in which an Oxygen transmission rate (OTR, mL·m−2·24 h−1) value below the detection limit of the instrument (0.01 mL·m−2·24 h−1) was recorded, even for ϕ as low as 0.0004. A dramatic increase of the OTR values occurred in humid conditions, such that the Barrier performance was totally lost at 90% RH (the OTR of coated PET films was equal to the OTR of bare PET films). Modelling of the experimental OTR data by Cussler’s model suggested that the spatial ordering of GO sheets within the main pullulan phase was perturbed because of RH fluctuations. In spite of the presence of the filler, all the formulations allowed the obtainment of final materials with haze values below 3%, the only exception being the formulation with the highest loading of GO (ϕ ≈ 0.03). The mechanisms underlying the experimental observations are discussed.
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Exceptional Oxygen Barrier performance of pullulan nanocomposites with ultra-low loading of graphene oxide
Nanotechnology, 2015Co-Authors: Ilke Uysal Unalan, Silvia Trabattoni, Chaoying Wan, Łukasz Figiel, Richard T. Olsson, Stefano FarrisAbstract:Polymer nanocomposites are increasingly important in food packaging sectors. Biopolymer pullulan is promising in manufacturing packaging films or coatings due to its excellent optical clarity, mechanical strength, and high water-solubility as compared to other biopolymers. This work aims to enhance its Oxygen Barrier properties and overcome its intrinsic brittleness by utilizing two-dimensional planar graphene oxide (GO) nanoplatelets. It has been found that the addition of only 0.2 wt% of GO enhanced the tensile strength, Young's modulus, and elongation at break of pullulan films by about 40, 44 and 52%, respectively. The light transmittance at 550 nm of the pullulan/GO films was 92.3% and haze values were within 3.0% threshold, which meets the general requirement for food packaging materials. In particular, the Oxygen permeability coefficient of pullulan was reduced from 6337 to 2614 mL μm m−2 (24 h−1) atm−1 with as low as 0.05 wt% of GO loading and further to 1357 mL μm m−2 (24 h−1) atm−1 when GO concentration reached 0.3 wt%. The simultaneous improvement of the mechanical and Oxygen Barrier properties of pullulan was ascribed to the homogeneous distribution and prevalent unidirectional alignment of GO nanosheets, as determined from the characterization and theoretical modelling results. The exceptional Oxygen Barrier properties of pullulan/GO nanocomposites with enhanced mechanical flexibility and good optical clarity will add new values to high performance food packaging materials.
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Ultrasound-assisted pullulan/montmorillonite bionanocomposite coating with high Oxygen Barrier properties.
Langmuir, 2012Co-Authors: Laura Introzzi, Thomas O. J. Blomfeldt, Silvia Trabattoni, Silvia Tavazzi, Nadia Santo, Alberto Schiraldi, Luciano Piergiovanni, Stefano FarrisAbstract:In this paper, the preparation and characterization of Oxygen Barrier pullulan sodium montmorillonite (Na+-MMT) nanocomposite coatings are presented for the first time. Full exfoliation of platelet ...
Laura Introzzi - One of the best experts on this subject based on the ideXlab platform.
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Ultrasound-assisted pullulan/montmorillonite bionanocomposite coating with high Oxygen Barrier properties.
Langmuir, 2012Co-Authors: Laura Introzzi, Thomas O. J. Blomfeldt, Silvia Trabattoni, Silvia Tavazzi, Nadia Santo, Alberto Schiraldi, Luciano Piergiovanni, Stefano FarrisAbstract:In this paper, the preparation and characterization of Oxygen Barrier pullulan sodium montmorillonite (Na+-MMT) nanocomposite coatings are presented for the first time. Full exfoliation of platelet ...
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ultrasound assisted pullulan montmorillonite bionanocomposite coating with high Oxygen Barrier properties
Langmuir, 2012Co-Authors: Laura Introzzi, Thomas O. J. Blomfeldt, Silvia Trabattoni, Silvia Tavazzi, Nadia Santo, Alberto Schiraldi, Luciano Piergiovanni, Stefano FarrisAbstract:In this paper, the preparation and characterization of Oxygen Barrier pullulan sodium montmorillonite (Na+-MMT) nanocomposite coatings are presented for the first time. Full exfoliation of platelet ...
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Self-assembled pullulan-silica Oxygen Barrier hybrid coatings for food packaging applications.
Journal of Agricultural and Food Chemistry, 2012Co-Authors: Stefano Farris, Laura Introzzi, Nadia Santo, José Maria Fuentes-alventosa, Roberto Rocca, Luciano PiergiovanniAbstract:The scope of this study encompassed the evaluation of pullulan as a suitable biopolymer for the development of Oxygen Barrier coatings to be applied on poly(ethylene terephthalate) (PET), especially for food packaging applications. To enhance the Oxygen Barrier properties of the organic phase (pullulan) even at high relative humidity values, an inorganic phase (silica), obtained through in situ polymerization, was also utilized to obtain hybrid coatings via the sol–gel technique. Transmission electron microscopy (TEM) images and Fourier transform infrared (FT-IR) spectra showed that mixing the two phases yielded a three-dimensional hybrid network formed by self-assembly and mediated by the occurrence of new hydrogen-bond interactions at the intermolecular level, although the formation of new covalent bonds could not be excluded. The deposition of the hybrid coatings decreased the Oxygen transmission rate (OTR) of the plastic substrate by up to 2 orders of magnitude under dry conditions. The best performan...
Silvia Tavazzi - One of the best experts on this subject based on the ideXlab platform.
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Transparent Pullulan/Mica Nanocomposite Coatings with Outstanding Oxygen Barrier Properties
Nanomaterials, 2017Co-Authors: Ilke Uysal Unalan, Silvia Trabattoni, Silvia Tavazzi, Derya Boyacı, Stefano FarrisAbstract:This study presents a new bionanocomposite coating on poly(ethylene terephthalate) (PET) made of pullulan and synthetic mica. Mica nanolayers have a very high aspect ratio (α), at levels much greater than that of conventional exfoliated clay layers (e.g., montmorillonite). A very small amount of mica (0.02 wt %, which is ϕ ≈ 0.00008) in pullulan coatings dramatically improved the Oxygen Barrier performance of the nanocomposite films under dry conditions, however, this performance was partly lost as the environmental relative humidity (RH) increased. This outcome was explained in terms of the perturbation of the spatial ordering of mica sheets within the main pullulan phase, because of RH fluctuations. This was confirmed by modelling of the experimental Oxygen transmission rate (OTR) data according to Cussler’s model. The presence of the synthetic nanobuilding block (NBB) led to a decrease in both static and kinetic coefficients of friction, compared with neat PET (≈12% and 23%, respectively) and PET coated with unloaded pullulan (≈26% reduction in both coefficients). In spite of the presence of the filler, all of the coating formulations did not significantly impair the overall optical properties of the final material, which exhibited haze values below 3% and transmittance above 85%. The only exception to this was represented by the formulation with the highest loading of mica (1.5 wt %, which is ϕ ≈ 0.01). These findings revealed, for the first time, the potential of the NBB mica to produce nanocomposite coatings in combination with biopolymers for the generation of new functional features, such as transparent high Oxygen Barrier materials.
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Transparent Pullulan/Mica Nanocomposite Coatings with Outstanding Oxygen Barrier Properties
2017Co-Authors: Ilke Uysal Unalan, Silvia Trabattoni, Silvia Tavazzi, Derya Boyacı, Stefano FarrisAbstract:This study presents a new bionanocomposite coating on poly(ethylene terephthalate) (PET) made of pullulan and synthetic mica. Mica nanolayers have a very high aspect ratio (α) at levels much greater than that of conventional exfoliated clay layers (e.g., montmorillonite). A very small amount of mica (0.02 wt%, which is ϕ ≈ 0.00008) in pullulan coatings dramatically improved the Oxygen Barrier performance of the nanocomposite films under dry conditions, whereas this performance was partly lost as the environmental relative humidity (RH) increased. This outcome was explained in terms of the perturbation of the spatial ordering of mica sheets within the main pullulan phase because of RH fluctuations, as confirmed by modelling of the experimental OTR data according to Cussler’s model. The presence of the synthetic nanobuilding block (NBB) led to a decrease in both static and kinetic coefficients of friction compared with neat PET (≈12% and 23%, respectively) and PET coated with unloaded pullulan (≈ 26% reduction in both coefficients). In spite of the presence of the filler, all of the coating formulations did not significantly impair the overall optical properties of the final material, which exhibited haze values below 3% and transmittance above 85%, with the only exception represented by the formulation with the highest loading of mica (1.5 wt%, which is ϕ ≈ 0.01). These findings revealed, for the first time, the potential of the NBB mica to produce nanocomposite coatings in combination with biopolymers for the generation of new functional features, such as transparent high Oxygen Barrier materials.
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Tunable green Oxygen Barrier through layer-by-layer self-assembly of chitosan and cellulose nanocrystals.
Carbohydrate Polymers, 2013Co-Authors: Paolo Biagioni, Silvia Tavazzi, Marco Finazzi, Luciano PiergiovanniAbstract:Abstract We address the Oxygen-Barrier properties of a nanocomposite created by layer-by-layer assembly of two biopolymers, chitosan (CS) and cellulose, in nanocrystals form (CNs), on an amorphous PET substrate. We systematically investigated the Oxygen permeability, morphology, and thickness of the nanocomposite grown under two different pH combinations and with different number of deposition cycles, up to 30 bilayers. Noticeably, the thickness of each deposited bilayer can be largely tuned by the pH value of the solution, from ∼7 up to ∼26 nm in the tested conditions. By our analysis, it is reliably concluded that such CS/CNs nanocomposite holds promises for gas Barrier applications in food and drug packaging as a clear coating on plastic films and tridimensional objects, improving performance and sustainability of the final packages.
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Ultrasound-assisted pullulan/montmorillonite bionanocomposite coating with high Oxygen Barrier properties.
Langmuir, 2012Co-Authors: Laura Introzzi, Thomas O. J. Blomfeldt, Silvia Trabattoni, Silvia Tavazzi, Nadia Santo, Alberto Schiraldi, Luciano Piergiovanni, Stefano FarrisAbstract:In this paper, the preparation and characterization of Oxygen Barrier pullulan sodium montmorillonite (Na+-MMT) nanocomposite coatings are presented for the first time. Full exfoliation of platelet ...
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ultrasound assisted pullulan montmorillonite bionanocomposite coating with high Oxygen Barrier properties
Langmuir, 2012Co-Authors: Laura Introzzi, Thomas O. J. Blomfeldt, Silvia Trabattoni, Silvia Tavazzi, Nadia Santo, Alberto Schiraldi, Luciano Piergiovanni, Stefano FarrisAbstract:In this paper, the preparation and characterization of Oxygen Barrier pullulan sodium montmorillonite (Na+-MMT) nanocomposite coatings are presented for the first time. Full exfoliation of platelet ...
John M Krochta - One of the best experts on this subject based on the ideXlab platform.
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Oxygen Barrier performance of whey protein coated plastic films as affected by temperature relative humidity base film and protein type
Journal of Food Engineering, 2006Co-Authors: Seok-in Hong, John M KrochtaAbstract:Abstract Oxygen permeation properties of whey-protein-coated plastic films were examined to compare their Oxygen-Barrier performance as affected by temperature (15–40 °C), relative humidity (30–85% RH), base film (PE: polyethylene & PP: polypropylene), and protein type (WPI: whey protein isolate & WPC: whey protein concentrate). The resulting whey-protein-coated films showed increase in Oxygen permeability (OP) as temperature increased, with an Arrhenius behavior, and activation energy of 10.9–12.1 kcal/mol, regardless of types of whey proteins and base films. Relative humidity had an exponential effect on OP of the coated films, with excellent Oxygen-Barrier properties at low to intermediate RH. Overall OP values of the whey-protein-coated PP were significantly lower than those of the coated PE, mainly due to the intrinsic permeation characteristics of the base films. No remarkable differences could be observed in the Oxygen-Barrier performance between WPI and WPC coatings. Results suggest that whey protein coatings could work successfully as an Oxygen Barrier under low moisture conditions and have potential as an alternative to existing expensive synthetic Oxygen-Barrier polymers in composite structures for food packaging applications.
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Whey protein isolate coating on LDPE film as a novel Oxygen Barrier in the composite structure
Packaging Technology and Science, 2004Co-Authors: Seok-in Hong, John M KrochtaAbstract:To examine the feasibility of whey protein isolate (WPI) coating as an alternative Oxygen Barrier for food packaging, heat-denatured aqueous solutions of WPI with various levels of glycerol as a plasticizer were applied on corona-discharge-treated low-density polyethylene (LDPE) films. The resulting WPI-coated LDPE films showed good appearance, flexibility and adhesion between the coating and the base film, when an appropriate amount of plasticizer was added to the coating formulations. WPI-coated LDPE films showed significant decrease in Oxygen permeability (OP) at low to intermediate relative humidity, with an Arrhenius behaviour and an activation energy of 50.26 kJ/mol. The OP of the coated films increased significantly with increasing relative humidity, showing an exponential function. Although the coated films showed a tendency to have less Oxygen Barrier and more glossy surfaces with increasing plasticizer content, differences in the OP and gloss values were not significant. Haze index and colour of the coated films were also little influenced by WPI coating and plasticizer content. The results suggest that whey protein isolate coating could work successfully as an Oxygen Barrier and have potential for replacing synthetic plastic Oxygen-Barrier layers in many laminated food packaging structures. Copyright © 2004 John Wiley & Sons, Ltd.
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Oxygen Barrier properties of whey protein isolate coatings on polypropylene films
Journal of Food Science, 2003Co-Authors: S.‐i. Hong, John M KrochtaAbstract:Oxygen permeation characteristics of whey protein isolate (WPI) coatings on polypropylene (PP) films were investigated to examine the feasibility of WPI coating as a novel biopolymer Oxygen Barrier for food packaging applications. Heat-denatured aqueous solutions of WPI with several plastictzers including plycerol, sorbitol, sucrose, propylene glycol, and polyethylene glycal were applied on the surfaces of PP flims previously treated with corona discharge. Among plasticizers used., sucrose conferred the best Oxygen barrter property to the WPI-coated films. Oxygen permeability (OP) of the resulting WPI-coated films. increased significantly with temperature, showing very good agreement with the Arrhenius model, OP of the coated films also increased exponentially with relative humidity.
