Permeability Properties of Fruit Puree Edible Films

McHugh, Tara H.; Huxsoll, C.C.; Krochta, John M.

doi:10.1111/j.1365-2621.1996.tb14732.x

Cited by 170 publications

(142 citation statements)

References 13 publications

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“…Os filmes de purê de frutas tiveram seu inicio de desenvolvimento em 1996 através do processamento de membranas elaborados a partir da polpa de maçãs [8] , sendo sugeridas para aplicações como embalagens ou em substituição aos revestimentos comestíveis normalmente obtidos por imersão. Além da maçã, uma série de frutas como pêssego [8] , manga [9] , tomate [10] , goiaba [11] e acerola [12] foram processadas e avaliadas.…”

Section: Introductionunclassified

Filmes de polpa de banana produzidos por batelada: Propriedades mecânicas e coloração

Martelli¹,

Barros²,

Assis³

2014

Polímeros

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Resumo: Polpa de bananas sobremaduras e impróprias ao consumo foram utilizadas como matéria-prima para a elaboração de formulações para o processamento de filmes biodegradáveis. Os filmes foram obtidos fazendo uso de uma máquina semi-industrial de laminação plástica da Mathis no modo batelada. Pequenas adições de glicerol como plastificante e de pectina como aglutinante foram avaliadas. O processamento via Mathis garantiu lâminas homogêneas e reprodutivas. O glicerol mostrou ser necessário para conferir plasticidade aos filmes. A melhor combinação entre módulo de elasticidade e máxima elongação foi a composição com 4,5% purê obtido da polpa de banana (g purê seco/100 g de solução filmogênica), 5% glicerol (g glicerol/100 g de purê seco) e 0,5% pectina (g pectina/100 g de solução filmogênica). A adição de 0,5% de pectina também proporcionou maior estabilidade da coloração dos filmes. Palavras-chave: Polpa de banana, biopolímeros, filmes biodegradáveis, propriedades mecânicas, filmes por casting. Puree Films from Bananas Processed in the Batching Mode: Mechanical Properties and Coloring VariationsAbstract: Puree prepared from over-ripe bananas, unfit for human consumption, was used as raw material for processing biodegradable films. The films were processed using a semi-industrial plastic lamination padder from Mathis running in the batch mode. Small amounts of glycerol as plasticizer and pectin as binding agent were evaluated. The use of the Mathis machine in the processing assured film homogeneity and repeatability. The addition of glycerol was necessary to confer film plasticity. The better combination of elasticity modulus and elongation was found for the puree with composition of 4.5% of banana pulp (g of dry weight/100 g of film solution), 5% glycerol (g of glycerol/100 g of puree) and 0.5% pectin (g pectin/100 g film solution). The addition of 0.5% pectin also resulted in a better film color stability.

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Section: Introductionunclassified

Filmes de polpa de banana produzidos por batelada: Propriedades mecânicas e coloração

Martelli¹,

Barros²,

Assis³

2014

Polímeros

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“…Crystalline structures in films are often associated with lowered permeability properties (McHugh and Krochta 1994). They may also have an effect on mechanical properties.…”

Section: Crystallinitymentioning

confidence: 99%

Long-Term Physical Stability of Plasticized Hemicellulose Films

Heikkinen¹,

Mikkonen²,

Koivisto³

et al. 2013

BioResources

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aOat spelt arabinoxylan (OsAX) and spruce galactoglucomannan (GGM) are hemicelluloses that can be extracted in large quantities from sidestreams of the agriculture and forest industries. They both form selfstanding films, making them potential future packaging materials. This systematic study focuses on the effect of long-term storage on the physical stability of hemicellulose-based films. OsAX and GGM films were plasticized with 40% (w/w of the polysaccharide) of glycerol, sorbitol, or their blends, and their stability was followed for four months. Ageing especially affected the glycerol-containing films, in which the tensile strength and Young's modulus increased and elongation at break decreased. Although the mechanical properties were altered, storage did not affect crystallinity of the films. Oxygen gas permeability (OP) and water vapor permeability (WVP) properties were monitored in OsAX films. Interestingly WVP decreased during storage; more than a 40% decrease was seen when plasticizer blends contained 50% or more glycerol. In contrast, there were no drastic changes in the OP during storage; all the OPs obtained were between 3.7 and 8.9 [cm 3 µm/ (m 2 d kPa)].

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“…The steady transfer rate was reached after ~1 h. The water-vapor transmission rate (WVTR) was defined as the slope (g/d) divided by the transfer area (m 2 ). After the permeation tests, film thickness was measured and WVP was calculated as follows (McHugh and Krochta 1994),…”

Section: Water Vapor Permeabilitymentioning

confidence: 99%

Physical and Mechanical Properties of Hydroxypropyl Methylcellulose–Coated Paper as Affected by Coating Weight and Coating Composition

Khwaldia

2013

BioRes

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Hydroxypropyl methylcellulose (HPMC)-coated papers without plasticizer and plasticized with polyols were prepared, and the effects of coating weight, different plasticizers (glycerol (GLY), sorbitol (SOR), and polyethylene glycol (PEG)), and plasticizer contents (20% to 50%) on the physical and mechanical properties of the resulting biopolymer-coated papers were studied. Coating weight was the most important factor affecting mechanical properties. Conversely, increasing coating weight led to a decrease in gloss and to an increase in tensile strength (TS), elongation at break (%E), and tearing resistance of coated papers. The application of unplasticized HPMC coatings (3 g/m 2 ) on paper reduced water vapor permeability (WVP) and water absorption capacity by 25% as compared with uncoated paper. All plasticizers significantly (p < 0.05) increased WVP and Cobb 60 values of the films. With the exception of PEG, no effect was found with plasticizers on TS and %E of coated papers compared with those without plasticizer. HPMC-coated papers with PEG as a plasticizer showed significantly lower TS and higher %E and tearing resistance than the other plasticized films (p < 0.05). HPMC coating improved tensile properties and tearing resistance of paper and could be regarded as a reinforcement layer.

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Permeability Properties of Fruit Puree Edible Films

Cited by 170 publications

References 13 publications

Filmes de polpa de banana produzidos por batelada: Propriedades mecânicas e coloração

Filmes de polpa de banana produzidos por batelada: Propriedades mecânicas e coloração

Long-Term Physical Stability of Plasticized Hemicellulose Films

Physical and Mechanical Properties of Hydroxypropyl Methylcellulose–Coated Paper as Affected by Coating Weight and Coating Composition

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