Composition Factors Affecting the Water Vapor Permeability and Tensile Properties of Hydrophilic Zein Films

Parris, Nicholas; Coffin, David R.

doi:10.1021/jf960809o

Cited by 163 publications

(143 citation statements)

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“…In general, it can be concluded that high ratio of plasticizer to corn-zein amount resulted in a rise in WVP of coated PP films while films with zein coating having low plasticizer content have high barrier to water vapor. Several authors studied the influence of the plasticizer content on barrier properties of zein films, and they showed that there is an increase in WVP of films with an increase in plasticizer content (Lai and Padua, 1997;Parris and Coffin, 1997;Ghanbarzadeh et al, 2006b;Rakotonirainy and Padua, 2001). The results of these studies agree with those reported in this study.…”

Section: Water Vapor Permeability Of Coated Filmssupporting

confidence: 89%

Water vapor and oxygen-barrier performance of corn–zein coated polypropylene films

Tıhmınlıoğlu

Atik

Özen

2010

Journal of Food Engineering

119

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a b s t r a c tA novel corn-zein coating structure on polypropylene (PP) films was developed to examine its feasibility as an alternative water vapor and oxygen-barrier for flexible packaging industry. The barrier properties of the resulting films were evaluated as affected by coating formulation (solvent, corn-zein, plasticizer concentration and plasticizer type). Corn-zein with different amounts (5% and 15%) was dissolved in 70% and 95% aqueous ethanol solution at 50°C, respectively. Solutions of corn-zein plasticized by polyethylene glycol (PEG) and glycerol (GLY) with various levels (20% and 50%) were applied on corona-dischargedtreated PP by using solvent-casting method. The significant improvements in water vapor and oxygenbarrier properties of uncoated PP films were obtained with corn-zein coating. Water vapor permeability (WVP) of the coated films decreased significantly with increasing corn-zein concentration. The application of plasticized corn-zein coating on PP films showed nearly more than three order of reduction in oxygen permeability (OP). The high water vapor and oxygen-barriers were obtained for films coated with coating formulation consisting of higher amounts of corn-zein plasticized by GLY. The statistical analysis defined the key parameters of coating formulation that had major effect on the final properties of coated PP films as corn-zein, plasticizer concentration, and plasticizer type.

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Section: Water Vapor Permeability Of Coated Filmssupporting

confidence: 89%

Water vapor and oxygen-barrier performance of corn–zein coated polypropylene films

Tıhmınlıoğlu

Atik

Özen

2010

Journal of Food Engineering

119

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“…Although there are some reports on using DAS as cross-linking agent for various proteins, such as soy protein isolate [26,27], collagen [28], corn zein [29], flour starch-protein [30], and whey protein [31], to the best of our knowledge there are very few studies on keratin materials cross-linked with DAS. We previously reported that the mechanical properties, thermal stability, and water vapor barrier property of FK/PVA blended films could be improved by DAS-induced cross-linking [32].…”

Section: Introductionmentioning

confidence: 99%

Keratin/Polyvinyl Alcohol Blend Films Cross-Linked by Dialdehyde Starch and Their Potential Application for Drug Release

Dou

Zhang

et al. 2015

Polymers

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Feather keratin (FK) extracted from feathers represents a valuable source of biodegradable and biocompatible polymer. The aim of this study was the development and characterization of blended films based on FK and polyvinyl alcohol (PVA) cross-linked by dialdehyde starch (DAS) for a potential drug release application. The compatibility of FK/PVA was improved when cross-linked by DAS: the relative crystallinity of the PVA/FK film slightly decreased, and the enthalpy value for the melting peak decreased by about 50% for the cross-linked films. The total soluble mass of all blend films in water was below 35% at 37 °C, indicating a good stability of the films in water. The results of the Rhodamine B dye (as a model drug) release tests showed that the release rates decreased with increasing DAS content. DAS-induced cross-linking improves several important properties of the FK/PVA films, such as the compactness, the compatibility, and the stability in water. These improvements offer the potential to expand the application of FK films in the biomaterial field. OPEN ACCESSPolymers 2015, 7 581

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“…Thermodynamic analysis was performed using the Universal Analysis 2000 software (version of 4.7A) of TA instruments. Each film sample (10-15 mg) was placed in a desiccator with % RH of 11,22,32,43, 56, 69, 75 and 84 for 72 h and was accurately weighed and then sealed in a DSC aluminum plate; subsequently, each sample was measured, taking an empty aluminum plate as a control. Each sample was first heated up to 100 °C and subsequently quenched to −20 °C.…”

Section: Dsc Testsmentioning

confidence: 99%

“…In quadruplicate, the dried samples were equilibrated in air-tight 1-l Kilner jars containing different saturated salt solutions of known RH at 25 °C. 21 The saturated salt solutions used were lithium chloride, potassium acetate, magnesium chloride, potassium carbonate, sodium bromide, strontium chloride, sodium chloride and potassium chloride, with % RH of 11,22,32,43, 56, 69, 75 and 84, respectively. The samples were weighed periodically (0.0001 g precision) until they attained a constant weight, at which point they were assumed to have reached equilibrium.…”

mentioning

confidence: 99%

“…Based on the Tg results, the SPI/PGA/La co-dried film had a compact intermolecular structure, no obvious phase separation and a better combination between the protein and polysaccharides and, therefore, better mechanical properties. 43 The oxygen permeability results of the SPI/PGA/La film (direct blending) and SPI/PGA/La film (co-dried blending) are shown in Figure 3b. These results indicated that, when added amount of La was 0.10 g g -1 SPI, the oxygen permeability was the lowest, which was 99.09 and 72.65% of the films without added La.…”

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confidence: 99%

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Combination of Propylene Glycol Alginate and Lauric Acid on Water Retention and Mechanical Properties of Soy Protein Isolate-Based Films

Liu¹,

Pan²,

Liao³

et al. 2017

J. Braz. Chem. Soc.

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The water sorption, water barrier properties and mechanical behavior of soy protein isolate (SPI) based films combined with propylene glycol alginate (PGA) and lauric acid (La) via a direct-or co-dried blending process were investigated. Higher water retention ability and a single glass transition temperature (Tg) were found when the PGA was added to form different ternary co-dried blending films by a co-drying process, indicating their compatibility. Tg was reduced in the case of higher relative humidity and incorporation of La. The response surface methodology (RSM) indicated that the effect of La content was highly significant (p < 0.05) for the water retention ability and mechanical properties, and the proposed models calculated for the tensile strength and elongation at break showed a good fit. The results revealed the importance of the interactions among lipids, protein and polysaccharide in composite films which also provided evidence for modeling film behavior.Keywords: co-dried blending film, glass transition temperature, water retention ability, mechanical properties, response surface methodology IntroductionConsiderable research interest in edible films derived from renewable sources (proteins, carbohydrates and lipids) or their combinations has been developed over the past two decades. Such films made from whey and soy proteins, corn zein, wheat gluten, and gelatin may be used as food coatings or stand-alone film wraps to retard unwanted mass transfer in food products. [1][2][3][4] They may also improve the recyclability of some packaging applications by reducing the need for complicated multilayer structures.Proteins and polysaccharides or their complexes are good film-forming materials, but the improvement of their water-barrier properties requires the extra addition of lipids, which can result in many types of new multicomponent edible films. In multi-component edible films, the addition of a lipid component will result in a significant increase in the film water-barrier properties, and affect the mechanical and oxygen-barrier properties. 5 Generally speaking, the atmospheric relative humidity surrounding the films influence lipid component less than hydrophilic component. The equilibrium moisture content has a much more obvious effect on the plasticization function, the barrier and mechanical performance of the hydrophilic film system. 6 Film equilibrium moisture is closely related to the environmental relative humidity (RH). The hydrophilic properties of protein and polysaccharides will result in the sensitivity of protein/polysaccharide-based edible films to environmental RH, and thus their film-forming performance varies. 6,7 However, different film-forming processes, film matrices, and addition proportions result in different effects on the properties of edible films, especially their mechanical and barrier properties. [8][9][10] Gas and water permeability of composite films consisting of protein-polysaccharide (soluble starch, modified starch, or chitosan), and plasticizer (water, sugars, or...

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Composition Factors Affecting the Water Vapor Permeability and Tensile Properties of Hydrophilic Zein Films

Cited by 163 publications

References 8 publications

Water vapor and oxygen-barrier performance of corn–zein coated polypropylene films

Water vapor and oxygen-barrier performance of corn–zein coated polypropylene films

Keratin/Polyvinyl Alcohol Blend Films Cross-Linked by Dialdehyde Starch and Their Potential Application for Drug Release

Combination of Propylene Glycol Alginate and Lauric Acid on Water Retention and Mechanical Properties of Soy Protein Isolate-Based Films

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