Condensed state structure and biocompatibility of the konjac glucomannan/chitosan blend films

Ye, X.; Kennedy, John F.; Li, B.; Xie, Bijun

doi:10.1016/j.carbpol.2005.11.005

Cited by 96 publications

(39 citation statements)

References 25 publications

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“…Meanwhile, when glucomannan was the main film fraction, the TS was significantly improved. The effect of the biopolymer ratio on the mechanical properties of blended films was also observed by Xiao et al (2001a), Ye et al (2006) and Li et al (2006) for films with binary blends of sodium carboximethylcellulose/glucomannan and chitosan/glucomannan, in which a high glucomannan ratio in the formulation resulted in films with high TS and elongation values.…”

Section: Polysaccharide and Gelatin Filmsmentioning

confidence: 67%

“…The lowest WVP value was observed in glucomannan-based films. Li et al (2006) did not observe improvements in WVP either, due to the blend of different glucomannan and chitosan ratios; and other authors (XIAO et al, 2001a;YE et al, 2006;LI et al, 2006) have reported the results only as to the film mechanical properties.…”

Section: Water Vapor Permeabilitymentioning

confidence: 85%

“…For every formulation, the polysaccharides included methylcellulose, glucomannan and pectin at ratio 1:4:1, respectively (F9 in Table 1). This ratio resulted in films with (27 MPa and 7%) (PÉROVAL et al, 2002), glucomannan (80 MPa and 33%) and chitosan (66 MPa and 32%) (YE et al, 2006) obtained without plasticizers. The differences would be due to physical and chemical characteristics of the used polysaccharides, film production conditions and different thickness obtained.…”

Section: Polysaccharide and Gelatin Filmsmentioning

confidence: 99%

“…The differences would be due to physical and chemical characteristics of the used polysaccharides, film production conditions and different thickness obtained. For instance, Ye et al (2006) worked with purified glucomannan, whereas the current study used glucomannan that still had some fat and protein traces, according to the product specifications. Turhan and Şahbaz (2004) worked with different methylcellulose concentrations and observed that the higher the concentration, the higher the TS values and the film elongation, referred to concentrations that led to good polysaccharide solubilization and good film-forming solution spreading on the plate.…”

Section: Polysaccharide and Gelatin Filmsmentioning

confidence: 99%

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Mechanical and water vapor permeability properties of biodegradables films based on methylcellulose, glucomannan, pectin and gelatin

Chambi¹,

Grosso²

2011

Ciênc. Tecnol. Aliment.

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Mechanical and water vapor permeability properties of biodegradables films based on methylcellulose, glucomannan, pectin and gelatin Propriedades mecânicas e de permeabilidade ao vapor de água de filmes biodegradáveis à base de metilcelulose, glucomanana, pectina e gelatinaHulda Noemi Mamani CHAMBI 1 *, Carlos Raimundo Ferreira GROSSO 1 IntroductionInterest in edible films is connected with the development of easily degradable packaging, non-aggressive to the environment (CHEN, 1995;KOELSCH, 1994). Natural polymers such as proteins and polysaccharides, offer great opportunities, since their biodegradability and environmental compatibility are assured (KROCHTA; DE MULDER-JOHNSON, 1997). However, films produced with these materials have low water vapor barrier property and low mechanical resistance in comparison with films produced from synthetic polymers.Several studies have been carried out to improve film performance such as the cross-linking of the polymeric chains (CARVALHO; GROSSO, 2004;HERNÁNDEZ-MUÑOZ;VILLALOBOS;CHIRALT, 2004;CHAMBI;GROSSO, 2006), the addition of hydrophobic compounds (TANADA-PALMU; GROSSO, 2002;BERTAN et al., 2005) and blended polysaccharides and/or proteins (XIAO et al., 2001a,b;CIEŚLA;SALMIERI;LACROIX, 2006;WANG et al., 2007).Another alternative to obtain films with good performance would be through mimic biological structures such as the cell wall composed of a three-dimensional network of cellulose, pectin, hemicelluloses (xylan, mannans, xyloglucans) and structural proteins (CHANLIAUD et al., 2002;KERSTIENS, 1996). This network should be able to bear high-strain strength allowing reversible deformation, in reply to the osmotic pressure caused by the cell turgescence (CHANLIAUD et al., 2002).Cellulose, the most abundant organic polymer in the world, is a linear homopolymer constituted by glucose molecules linked by highly polar and hydrophilic glycosidic bonds β (1-4); however, it is insoluble in water (JUNQUEIRA, 1997). In order to provide solubility, cellulose is esterified ResumoMimetizar estruturas biológicas como a parede celular dos tecidos vegetais pode ser uma alternativa para obter filmes biodegradáveis com propriedades mecânicas e de barreira ao vapor de água melhoradas. O objetivo do presente trabalho foi avaliar as propriedades mecânicas e de permeabilidade ao vapor de água (PVA) de filmes produzidos pelo método de evaporação do solvente (casting) a partir de misturas de metilcelulose, glucomanana, pectina e gelatina. Inicialmente, foram produzidos filmes a partir dos polissacarídeos em pH 4. O filme com melhor desempenho mecânico (tensão na ruptura = 72,64 MPa; elongação = 9,85%) foi obtido a partir de metilcelulose-glucomanana-pectina na proporção 1:4:1, respectivamente. Posteriormente, adicionou-se gelatina a esta mistura de polissacarídeos, e o pH foi ajustado para 4, 5 e 6. Os resultados mostraram melhoras significativas na PVA quando os filmes foram produzidos em pH 5 e com as proporções polissacarídeos/gelatina de 90/10 e 10/90, atingindo-se valores de 0,094 e 0,118 ...

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Section: Polysaccharide and Gelatin Filmsmentioning

confidence: 67%

Section: Water Vapor Permeabilitymentioning

confidence: 85%

Section: Polysaccharide and Gelatin Filmsmentioning

confidence: 99%

Section: Polysaccharide and Gelatin Filmsmentioning

confidence: 99%

See 2 more Smart Citations

Mechanical and water vapor permeability properties of biodegradables films based on methylcellulose, glucomannan, pectin and gelatin

Chambi¹,

Grosso²

2011

Ciênc. Tecnol. Aliment.

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“…The strong intermolecular hydrogen bonds existing between the amino groups of chitosan and the hydroxyl groups of konjac glucomannan in the blend films resulting in the enhancement of mechanical properties especially to the blend film KC2 (weight ratio of konjac glucomannan to chitosan = 8:2). And the MTT assay (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide methods) and cell morphology evaluation (such as smear method) proved that the KC2 blend films had good biocompatibility, making it possible to apply the KC2 blend film to biomaterial (Li, Kennedy, Peng, Yie, & Xie, 2006;Ye, Kennedy, Li, & Xie, 2006). Because the gamma irradiation is a general sterilization method for biomaterial.…”

Section: Introductionmentioning

confidence: 99%