Water vapour permeability and mechanical properties of mixed starch-monoglyceride films and effect of film forming conditions

Petersson, Maria; Stading, Mats

doi:10.1016/j.foodhyd.2004.04.021

Cited by 102 publications

(58 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A presença do material hidrofóbico pode dificultar a sorção de umidade dos filmes e refletir em menor variação das propriedades mecânicas diante diferentes condições ambientais. Estudos já avaliaram a incorporação de lipídios em filmes de amido e de proteína [5,6] com o objetivo de reduzir a hidrofilicidade dos materiais. No entanto, esta incorporação é difícil, uma vez que ocorre a incompatibilidade entre os compostos, tornando-se necessária a adição de agentes emulsificantes para que não ocorra a separação de fases.…”

Section: -Efeito Do Processamento E Das Condições Ambientais Nas Propunclassified

Efeito do Processamento e das Condições Ambientais nas Propriedades de Matérias Biodegradáveis de Amido de Aveia

Galdeano¹,

Wilhelm²,

Grossmann³

et al. 2014

Polímeros

View full text Add to dashboard Cite

Resumo: A característica hidrofílica dos biomateriais a base de amido resulta em alta instabilidade diante de diferentes condições ambientais. O amido de aveia, por possuir um conteúdo maior de lipídios em relação a outros amidos, tornase uma fonte interessante, uma vez que a hidrofobicidade aumentada pode atuar reduzindo sua capacidade de sorção de umidade. O objetivo do trabalho foi investigar o comportamento de filmes e laminados de amido de aveia, produzidos por casting e extrusão, respectivamente, plastificados com glicerol, sorbitol e ureia e armazenados em diferentes condições de umidade relativa. Mesmo com a presença do lipídio nativo, os materiais ainda mostraram instabilidade diante do aumento da umidade relativa de armazenagem, sendo observado um decréscimo na força e um aumento na deformação nos testes de perfuração. Em geral os biomateriais plastificados com glicerol apresentaram maior capacidade de sorção de água. O sorbitol foi o plastificante mais efetivo, pois produziu materiais com propriedades mecânicas similares aos outros plastificantes mesmo sendo usado em menor concentração molar. O processo de extrusão resultou em materiais finais com estruturas mais abertas e fragmentadas. Palavras-chave: Aveia, amido, plastificante. Effect of Processing and Enviromental Conditions in the Properties of Oat Starch Biodegradable MaterialsAbstract: The hydrophilic character of starch-based biomaterials generates high instability under different environmental conditions. Oat starch shows an interesting alternative for starch films because it contains higher lipid content than other common starches. This increased hydrophobicity can act reducing the moisture sorption capacity. The objective of this study was to investigate the behavior of oat starch films and sheets produced by casting and extrusion, respectively, plasticized with glycerol, sorbitol and urea and stored at different relative humidity. Even with the presence of native lipid, the materials still showed instability upon increasing the relative humidity for storage. Under higher humidity, a decrease in strength and an increase in deformation in puncture tests were observed. Biomaterials plasticized with glycerol showed higher water sorption capacity. Sorbitol was the most effective plasticizer because it led to materials with similar mechanical properties to other plasticizers even at lower molar concentrations. The extrusion process resulted in final materials with more open, fragmented structures.

show abstract

Section: -Efeito Do Processamento E Das Condições Ambientais Nas Propunclassified

Efeito do Processamento e das Condições Ambientais nas Propriedades de Matérias Biodegradáveis de Amido de Aveia

Galdeano¹,

Wilhelm²,

Grossmann³

et al. 2014

Polímeros

View full text Add to dashboard Cite

show abstract

“…Starch-based films act as a key role in this kind of film. The advantages of starch based films are more in the area of decreasing gas exchange rather than retardation of water loss due to their hydrophilic nature (Rindlav-Westling, Stading et al 1998;Sobral, Menegalli et al 2001;Parra, Tadini et al 2004;Petersson and Stading 2005;Bertuzzi, Vidaurre et al 2007). The functional, organoleptic, nutritional and mechanical properties of an edible film can be modified by the addition of various chemicals in minor amounts.…”

Section: Introductionmentioning

confidence: 99%

Extrusion Processing of Starch Film

Su¹,

Xie²,

Li³

et al. 2009

International Journal of Food Engineering

View full text Add to dashboard Cite

Processing behaviors of starch film using a twin screw extruder were studied; in particular the effect of processing conditions, such as temperature, screw speed, feeding speed, and water content, on the extrusion torque and die pressure were systematically investigated. A specific focus of this work was to investigate the effect of amylose/amylopectin ratio containing in cornstarch on the film processing and performances. It was found that the processibility was decreased as the amylose content increased. Pre-mixing and equilibration improve the processibility of starch films, especially for the high amylose starches. The high amylose starches need higher moisture content and temperature for film extrusion.

show abstract

“…The presence of glycerol or monoglyceride affected the final appearance of the films and only a slight phase separation was observed on monoglyceride starch films, which were more opaque than starch and glycerol-starch films probably because the hydrophobicity conferred by the monoglyceride. According to Petersson and Stading (2005), monoglyceride concentration affected the final appearance of casted starch films, which became more opaque and shrunken at higher monoglyceride concentrations (about 10 g/100 g starch). In this study, two factors probably inhibited the phase separation in monoglyceride starch films: the extrusion process employed to form the starch-monoglyceride complex and the lower monoglyceride concentration employed in film formulations (2 g/100 g starch).…”

Section: Resultsmentioning

confidence: 99%

“…They become brittle in a dry atmosphere and lose strength and barrier properties in high humidity. The moisture sensitivity in particular must be reduced if starch is to become an alternative to conventional plastics in industrial applications (Petersson and Stading, 2005). Although some good solutions have been found until now as blends of starch with natural or synthetics biodegradable polyesters (polylactic acid, polycaprolactone, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Garcia et al (2000) analyzed the barrier properties of starch-based films and coatings from corn and high amylose corn with addition of sunflower oil as hydrophobic component and with a plasticizer present. Petersson and Stading (2005) studied the mechanical and barrier properties of starchmonoglyceride films and observed a decrease in water vapor permeability. Nevertheless, they reported that phases separation occurred in films with high amount of monoglyceride (about 10 g/100 g starch).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of relative humidities on microstructural, barrier and mechanical properties of Yam starch-monoglyceride films

Ferreira

Grossmann

Mali

et al. 2009

Braz. arch. biol. technol.

View full text Add to dashboard Cite

show abstract

Water vapour permeability and mechanical properties of mixed starch-monoglyceride films and effect of film forming conditions

Cited by 102 publications

References 24 publications

Efeito do Processamento e das Condições Ambientais nas Propriedades de Matérias Biodegradáveis de Amido de Aveia

Efeito do Processamento e das Condições Ambientais nas Propriedades de Matérias Biodegradáveis de Amido de Aveia

Extrusion Processing of Starch Film

Effect of relative humidities on microstructural, barrier and mechanical properties of Yam starch-monoglyceride films

Contact Info

Product

Resources

About