Evaluation of the effects of glycerol and sorbitol concentration and water activity on the water barrier properties of cassava starch films through a solubility approach

Müller, Carmen Maria Olivera; Yamashita, Fábio; Laurindo, João Borges

doi:10.1016/j.carbpol.2007.07.026

Cited by 265 publications

(177 citation statements)

References 17 publications

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“…Increase of plasticizer content from 15 to 45 % effectively influence the swelling capacity and water uptake of plasticized SPS films; but this was not the case with S-plasticized films because they were less affected by plasticizer concentration. Müller et al (2008) also reported similar results, when they evaluated the effect of glycerol and sorbitol on cassava starch films.…”

Section: Water Absorption and Swelling Indexmentioning

confidence: 53%

“…Chiumarelli and Hubinger (Chiumarelli and Hubinger 2014) and Müller et al (Müller et al 2008) reported that plasticizer type and concentration has strong impact on film solubility. Figure 6 uncovers the influence of plasticizers on SPS film solubility in water; the results obtained were 35.14-41.52 % for G-plasticized films; 22.14-30.44 % for Splasticized films and 24.09-41.43 % for GS-plasticized films at concentration range of 15-45 %.…”

Section: Film Solubilitymentioning

confidence: 99%

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Effect of plasticizer type and concentration on physical properties of biodegradable films based on sugar palm (arenga pinnata) starch for food packaging

et al. 2015

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In this study, sugar palm starch (SPS) films were developed using glycerol (G), sorbitol (S) or their combination (GS) as plasticizers at the ratio of 15, 30 and 45 (wt)% using casting technique. The addition of plasticizers to SPS film-forming solutions helped to overcome the brittle and fragile nature of unplasticized SPS films. Increased plasticizer concentration resulted to an increase in film thickness, moisture content and solubility. On the contrary, density and water absorption of plasticized films decreased with increasing plasticizer concentration. Raising the plasticizer content from 15 to 45 % showed less effect on the moisture content and water absorption of S-plasticized films. Films containing glycerol and glycerol-sorbitol plasticizer (G, and GS) demonstrated higher moisture content, solubility and water absorption capacity compared to S-plasticized films. The results obtained in this study showed that plasticizer type and concentration significantly improves film properties and enhances their suitability for food packaging applications.

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Section: Water Absorption and Swelling Indexmentioning

confidence: 53%

Section: Film Solubilitymentioning

confidence: 99%

Effect of plasticizer type and concentration on physical properties of biodegradable films based on sugar palm (arenga pinnata) starch for food packaging

et al. 2015

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“…Muller, Yamashita e Laurindo [17] estimaram a partir dos parâmetros dos modelos de GAB e BET, que modelam as isotermas de sorção de água, o coeficiente de solubilidade e de difusão, sendo a higroscopicidade avaliada através da definição destes coeficientes. Verificaram que o aumento da solubilidade da água na matriz do filme é o principal fator para o aumento da PVA e que este coeficiente é influenciado tanto pela formulação do filme (concentração e tipo de plastificante) como pela umidade ambiente.…”

Section: Determinação Das Isotermas De Sorçãounclassified

“…Os parâmetros obtidos através da modelagem das isotermas usando o modelo de GAB estão apresentados na Tabela 2. O ajuste do modelo aos dados foi considerado satisfatório e similar aos obtidos por outros pesquisadores da área de biofilmes [17,[19][20][21][22] . O parâmetro C dos filmes obtidos por blendas entre o amido e PBAT não foi significativo, enquanto os parâmetros k e m o foram significativos (p < 0,05).…”

Section: Isotermas De Sorçãounclassified

Hidrofilicidade de filmes de amido/poli(butileno adipato co-tereftalato) (Pbat) adicionados de tween 80 e óleo de soja

2013

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Resumo: A incorporação de amido ao polímero poli (butilenoadipatoco-tereftalato) (PBAT) através de blendas com alto teor de amido pode ser uma alternativa para obter embalagens biodegradáveis, minimizar custos e o uso de recursos não renováveis. No entanto, a adição de amido aumenta a permeabilidade ao vapor de água (PVA). A incorporação em filmes com amido de substâncias como óleos vegetais e surfactantes pode diminuir a hidrofilicidade, favorecendo as aplicações destes como embalagens. A hidrofilicidade dos filmes elaborados por blendas de amido/PBAT adicionados de óleo de soja (OS) e tween 80 (TW) foi avaliada considerando o efeito do OS e TW nas isotermas de sorção dos filmes, na PVA e nos coeficientes de difusão (D w ) e solubilidade (β) do vapor de água. Filmes com OS com ou sem TW apresentaram menor quantidade de água de sorção, sendo os filmes com menores quantidades de OS e sem TW menos hidrofílicos e menos permeáveis aos vapores de água. A adição de OS reduziu os valores de β e D w dos filmes de amido/PBAT. O efeito foi relacionado com o aumento das porções hidrofóbicas e da compatibilidade entre o amido e PBAT na presença de OS. Palavras-chave: Polímeros biodegradáveis, extrusão de sopro, blendas. Hydrophilicity of Starch and Poly(Butylene Adipate-Co-Terephthalate) (Pbat) Films Containing Tween 80 and Soybean OilAbstract: Incorporating starch into the poly(butylene adipate-co-terephthalate) (PBAT) polymer by means of blends with high starch contents is a possible option for producing biodegradable packaging using renewable resources and reducing costs. However, the addition of starch increases the water vapour permeability (WVP). The incorporation of substances as lipids and surfactants can reduce the hydrophilicity of films containing starch, favouring their use as packaging. The hydrophilicity of films produced from blends of starch/PBAT with added soybean oil (SO) and tween 80 (TW) was studied. The effects of these substances on the sorption isotherm, on the WVP and on the water vapour diffusion (D w ) and solubility (β) coefficients of the films were evaluated. The water sorption in films with SO, with or without TW, was low. The films with the lowest amount of SO and without TW were the least hydrophilic and less permeable to water vapour. Adding SO reduced the β and D w values of the starch/PBAT films. This effect was related to the increase in the hydrophobic portions and the compatibility between starch and PBAT in the presence of SO.

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“…This trend is noticed in polymers based on starch as well. The raising of glycerol content increases the hydrophilicity of these films, which might be related with the OH functional groups of the glycerol [30][31][32][33] . Figure 5 presents the images of scanning electron microscopy of the polymers with hydrophobic characteristics on the fracture surface of the TPS samples, according to Table 6.…”

Section: Starch Modified With Silicamentioning

confidence: 98%

Influence of addition of silanized nanosilica and glycerol on hydrophobicity of starch using a factorial design

et al. 2017

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ObstractThe thermoplastic starch (TPS) is regarded as a promising material for manufacturing packaging and products with biodegradable properties. This study aimed at obtaining hydrophobic starch using silanized silica nanoparticles (nSS) with hexamethyldisilazane. A factorial design 2 2 with central point was developed to evaluate the influence of glycerol (plasticizer) and nSS addition on the properties of water absorption, solubility and TPS contact angle. The materials morphology was also evaluated by means of scanning electron microscopy. The amount of glycerol and nSS influenced on starch hydrophobic character, for the increase of the glycerol dosage contributed to the increase of absorption and solubility of TPS in water. On the other hand, nSS has greater influence on the characteristics related to the TPS surface, favoring an increase of up to 27% in the contact angle values. Therefore, the sample with the greatest hydrophobic character was obtained by using lowest amounts of glycerol (30%) and highest amounts of nSS (5%).

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Evaluation of the effects of glycerol and sorbitol concentration and water activity on the water barrier properties of cassava starch films through a solubility approach

Cited by 265 publications

References 17 publications

Effect of plasticizer type and concentration on physical properties of biodegradable films based on sugar palm (arenga pinnata) starch for food packaging

Effect of plasticizer type and concentration on physical properties of biodegradable films based on sugar palm (arenga pinnata) starch for food packaging

Hidrofilicidade de filmes de amido/poli(butileno adipato co-tereftalato) (Pbat) adicionados de tween 80 e óleo de soja

Influence of addition of silanized nanosilica and glycerol on hydrophobicity of starch using a factorial design

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