Oxygen and Carbon Dioxide Permeability of Wheat Gluten Film:  Effect of Relative Humidity and Temperature

Mújica-Paz, H.; Gontard, Nathalie

doi:10.1021/jf970201v

Cited by 86 publications

(56 citation statements)

References 29 publications

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“…A number of publications in the literature discuss oxygen permeability of protein-based films and the effect of humidity and temperature on those results. 31,32 These publications typically focus on edible films which contain plasticizing agents and are based on protein and cellulosic materials. Given the results from these publications, it is difficult to determine whether the gas permeability differences measured in the LLDPE/soy flour blends are the result of particle distribution or a property of the soy flour itself.…”

Section: Coextrusion Processingmentioning

confidence: 99%

Development of a melt‐extrudable biobased soy flour/polyethylene blend for multilayer film applications

Thellen

Hauver

Ratto

2014

J of Applied Polymer Sci

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Monolayer and multilayer films from biobased linear low-density polyethylene and milled soy flour were produced through cast film coextrusion processes using conventional thermoplastic processing equipment. Films containing 10 and 20% by weight of soy flour milled to maximum particle sizes of 8, 11, and 22 mm were extruded and characterized as a packaging film material. Water resistance, tensile properties, and gas permeability were measured on each film and analyzed with respects to the soy particle size, soy loading, and layer configuration in the multilayer film structure. Mechanical properties results indicated that ultimate elongation of the soy-containing films decreased by as much as 14% compared to the control, while tensile strength and maximum load testing did not reveal any identifiable trends. Monolayer soy-containing film showed high moisture sensitivity, as measured by contact angle and absorption testing, while the multilayer films demonstrated a more hydrophobic nature as indicated by higher contact angle measurements. This increase in hydrophobic properties is due to protective polyolefin skin layers, which are more hydrophobic. Oxygen transmission rates of the multilayer films decreased by 38% due to the presence of soy flour as compared to the control that did not contain any soy flour.

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Section: Coextrusion Processingmentioning

confidence: 99%

Development of a melt‐extrudable biobased soy flour/polyethylene blend for multilayer film applications

Thellen

Hauver

Ratto

2014

J of Applied Polymer Sci

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“…With respect to its unique viscoelastic and film-forming properties, WG is an interesting raw material that can be used as a food packaging material. WG basedfilms present an attractive combination of strength and flexibility [32,33], a high gas (oxygen and carbon dioxide) permeability in dry condition and a significant gas perm-selectivity at high relative humidity [34][35][36], and good grease [36] and aroma barrier properties [37] which are key functional properties for food quality preservation. They also are translucent [33] and can be heat-sealed [38].…”

Section: Wheat Gluten-based Nano-biocompositesmentioning

confidence: 99%

Protein/Clay Nano-Biocomposites

Angellier‐Coussy

Gastaldi

2012

Environmental Silicate Nano-Biocomposites

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In the current context, protein-based materials might be considered as an alternative to the petroleum-based plastics since fully biodegradable and characterized by remarkable functional properties that can be exploited in a wide range of non-food applications. To improve their performances that are often restricted by high water sensitivity and low mechanical properties, a relevant strategy consisted in the development of protein/clay nanocomposite. For this purpose, several examples of protein-based nano-biocomposites were presented with a special attention for the methods used for the incorporation of layered silicates (organically modified or not) into the matrices and the ultimate functional properties exhibited by the resulting materials. In terms of mechanical properties, the addition of nanoclays leads to a significant improvement of material performance with an increase of Young's modulus and tensile strength ranging between 1.5 and 2 times. As regards as barrier properties, the improvement appeared quite moderate in spite of a rather good dispersion of layered silicates that would be expected to result in a tortuous pathway limiting diffusion of gases molecules. Thus, a two-fold reduction in water vapour permeability was obtained, and the same or no effect in the case of permeability toward O 2 and CO 2 .

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“…In general, wheat gluten films show low TS, but high elongation (E) compared with other films; however, their mechanical properties depend greatly on processing conditions. Both moisture and gas permeabilities are highly dependent on RH, T and on the nature and amount of plasticizer added [32]. The addition of plasticizers is essential to avoid film brittleness as a consequence of extensive intermolecular associations [14].…”

Section: Wheat Glutenmentioning

confidence: 99%