Preparation and characterization of konjac glucomannan and sodium carboxymethylcellulose blend films

Xiao, Changfa; Lu, Yuchao; Liu, Hongjuan; Zhang, Lina

doi:10.1002/1097-4628(20010404)80:1<26::aid-app1070>3.0.co;2-b

Cited by 44 publications

(28 citation statements)

References 11 publications

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“…The band at 1,080 cm -1 represents the -C-O-C-stretching [43]. In case of plain IPNMs, the -OH stretching frequency 3,423 cm -1 shifted toward lower side indicates the development of hydrogen bonding between NaCMC with PVA and the intense peak at 1,080 cm -1 indicating the formation of acetal between NaCMC, PVA by GA [44]. All these changes show a strong evidence of the intermolecular interactions, cross-linking, and good molecular compatibility between NaCMC and PVA.…”

Section: Resultsmentioning

confidence: 92%

Preparation and characterization of pH sensitive poly(vinyl alcohol)/sodium carboxymethyl cellulose IPN microspheres for in vitro release studies of an anti-cancer drug

et al. 2011

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Interpenetrating polymeric network microspheres (IPNMs) consisting of poly(vinyl alcohol) and sodium carboxymethylcellulose were prepared by water-inoil emulsion method and were cross-linked with glutaraldehyde. 5-Fluorouracil (5-FU), an anti-cancer drug, was loaded into IPNMs via in situ method. These IPNMs have been characterized by Fourier transform infrared spectroscopy, which confirms the cross-linking of IPNMs through glutaraldehyde. Differential scanning calorimetry and X-ray diffraction analysis of the drug-loaded IPNMs have confirmed uniform molecular dispersion of 5-FU in the IPNMs. Particle size measured using optical microscopy gave an average size of 80-250 lm. Scanning electron microscopy also confirmed the formation of microspheres with smooth surface and spherical shape. Encapsulation efficiency of 5-FU in these IPNMs was achieved up to 62%. Drug release profiles of the IPNMs at different pH conditions (pH 1.2 and 7.4) confirmed that microspheres formed are pH sensitive, resulting controlled release of drug during in vitro dissolution experiments. It has been analyzed with an empirical equation to understand the diffusion nature of drug through the IPNMs. Both encapsulation efficiency and release patterns are found to depend on the nature of the cross-linking agent as well as amount of drug loading. In vitro release studies indicated the release of 5-FU for more than 10 h.

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Section: Resultsmentioning

confidence: 92%

Preparation and characterization of pH sensitive poly(vinyl alcohol)/sodium carboxymethyl cellulose IPN microspheres for in vitro release studies of an anti-cancer drug

et al. 2011

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“…Most studies focus on the use of two biopolymers in film production as the binary blends of glucomannan/sodium carboxymethylcellulose, cassava starch/arabinoxylan, agar/ arabinoxylan, and agar/cassava starch (XIAO et al, 2001a;PHAN THE et al, 2009). Films from three polysaccharides were obtained by Tong, Xiao and Lim (2008), who blended pullulan with alginate and carboxymethylcellulose.…”

Section: Film Formationmentioning

confidence: 99%

“…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: 99%

“…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: 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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“…[13][14][15][16][17][18] A CMC é um polímero natural, éter de celulose, que possui como estrutura base o polímero β(1→4)-D-glucopiranose da celulose. Por outro lado, AS é um polissacarídeo de origem natural derivado principalmente de algas marinhas marrons, formado por cadeias lineares de β(1→4)-D-ácido manurônico e α(1→4)-L-ácido gulurônico.…”

Section: Introductionunclassified

Preparação, caracterização e propriedades de filmes poliméricos com potencial aplicação no recobrimento de sementes

Oliveira¹,

Soldi²,

Coelho³

et al. 2009

Quím. Nova

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Preparation and characterization of konjac glucomannan and sodium carboxymethylcellulose blend films

Cited by 44 publications

References 11 publications

Preparation and characterization of pH sensitive poly(vinyl alcohol)/sodium carboxymethyl cellulose IPN microspheres for in vitro release studies of an anti-cancer drug

Preparation and characterization of pH sensitive poly(vinyl alcohol)/sodium carboxymethyl cellulose IPN microspheres for in vitro release studies of an anti-cancer drug

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

Preparação, caracterização e propriedades de filmes poliméricos com potencial aplicação no recobrimento de sementes

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