Preparation and characterization of pullulan–chitosan and pullulan–carboxymethyl chitosan blended films

Jia, Wang; Zhong, Fang; Li, Yue; Shoemaker, Charles F.; Xia, Wenshui

doi:10.1016/j.foodhyd.2012.04.002

Cited by 281 publications

(108 citation statements)

References 28 publications

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“…The reflection around 10° indicates the presence of the crystal form I. The strongest reflection at 2θ=20° corresponds to the crystal form II, as per the recent reports by Wu et al 41 and Pastor et al 42 In emulsion-impregnated films, the peak at 20° became wider, which indicated that the crystallization of chitosan was reduced during the film formation.…”

Section: °supporting

confidence: 77%

Eucalyptus oil nanoemulsion-impregnated chitosan film: antibacterial effects against a clinical pathogen, Staphylococcus aureus, in vitro

Sugumar¹,

Mukherjee²,

Chandrasekaran³

2015

IJN

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Eucalyptus oil ( Eucalyptus globulus ) nanoemulsion was formulated using low-and high-energy emulsification methods. Development of nanoemulsion was optimized for system parameters such as emulsifier type, emulsifier concentration, and emulsification methods to obtain a lower droplet size with greater stability. The minimized droplet diameter was achieved using the high-energy method of ultrasonication. Tween 80 was more effective in reducing droplet size and emulsion appearance when compared to Tween 20. Stable nanoemulsion was formulated with Tween 80 as a surfactant, and the particle size was found to be 9.4 nm (1:2 v/v). The eucalyptus oil nanoemulsion was impregnated into chitosan (1%) as a biopolymer in varying concentrations. Further, the film was characterized by moisture content, microscopic study, X-ray diffraction, and Fourier transform infrared spectroscopy. Also, the film with and without nanoemulsion was evaluated against Staphylococcus aureus . The nanoemulsion-impregnated chitosan film showed higher antibacterial activity than chitosan film. These results support the inclusion of nanoemulsion-impregnated chitosan film in wound management studies.

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Section: °supporting

confidence: 77%

Eucalyptus oil nanoemulsion-impregnated chitosan film: antibacterial effects against a clinical pathogen, Staphylococcus aureus, in vitro

Sugumar¹,

Mukherjee²,

Chandrasekaran³

2015

IJN

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“…The portion of water-insoluble SPI film maintained the initial structural integrity (29). In general, CMC contains both hydroxyl groups and carboxyl groups, and these groups can form hydrogen bonds with water, allowing the dissolution of CMC in water easier than that of other polymers (30). Therefore, CMC in this study underwent more pronounced swelling in water than did SPI.…”

Section: Resultsmentioning

confidence: 74%

Characterization of physical, mechanical, and antioxidant properties of soy protein-based bioplastic films containing carboxymethylcellulose and catechin

Han

Shin

Park

et al. 2015

Food Sci Biotechnol

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The aim of this study was to develop functional bioplastic materials for food packaging by incorporating a natural antioxidant agent into soy protein-based films. The film formulations were composed of soy protein isolate (SPI) in combination with carboxymethylcellulose (CMC) and/or catechin (CT). The original SPI film exhibited a good optical transparency, whereas it turned opaque after being blended with CMC or CT. The SPI film spiked with CMC showed enhanced water solubility and tensile strength, and decreased water vapor permeability and percentage elongation, as compared with pure SPI film. However, the oxygen permeability of the film was barely influenced by the addition of CMC. Furthermore, the CT-incorporated SPI or SPI/CMC films demonstrated a synergistic freeradical scavenging effect. The results suggested that the soy protein-based bioplastic film developed in this study could be used as a potent antioxidant packaging material in the food industry.

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“…La solubilidad en agua de los filmes expresada en términos de masa soluble (%ms) fue realizada por triplicado y se determinó según el método propuesto por Gontard [8] con algunas modificaciones. Estos resultados de solubilidad en agua de las películas podrían ser utilizados para estimar la velocidad a la que podrían disolver si se expone a una ambiente húmedo durante una aplicación específica [9] para esto se utilizaron muestras de 1cm 2 de área, que fueron pesadas inicialmente y se sumergieron en recipientes con 10 ml de agua destilada durante un periodo de 24 horas a temperatura ambiente. Seguidamente, las muestras se secaron a 60°C para determinar el peso seco final de la muestra.…”

Section: Caracterización De Los Filmes De Quitosano/ Lactosuerounclassified

Síntesis y propiedades de filmes basados en quitosano/lactosuero

et al. 2015

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ResumenEl quitosano es un polímero natural derivado de la desacetilación de la quitina con propiedades tales como biocompatibilidad, biodegradabilidad y formación de filmes, de gran aplicación en el campo de la industria, alimentación y medicina. Los filmes a base de quitosano y lactosuero fueron preparados teniendo en cuenta la concentración de la solución de quitosano (1; 1.5 y 2% v/v), la relación en volumen de lactosuero (4:20, 6:20 y 8:20 v/v) y el tiempo de secado de 4.5, 5.0 y 5.5 horas. Estas condiciones de preparación se optimizaron empleando la metodología de la superficie de respuesta. La quitina extraída previamente de los exoesqueletos de camarón fue tratada con una solución acuosa de NaOH al 50% en masa, hasta obtener quitosano con un grado de desacetilación de 80.72%. El quitosano obtenido fue disuelto en ácido acético para obtener las distintas soluciones que posteriormente fueron combinadas con lactosuero. Los filmes sintetizados fueron caracterizados por espectroscopia en la región del infrarrojo y se evaluaron los parámetros de espesor, densidad, solubilidad, transparencia, hinchamiento y degradación. La degradación de los filmes quitosano/lactosuero disminuye con el aumento de la concentración de quitosano. El porcentaje de hinchamiento de los filmes se ve afectado por las proporciones de lactosuero. La concentración de lactosuero incide en el aumento del espesor y la densidad de los filmes. Palabras-clave: quitosano, lactosuero, filme, solubilidad, degradación. AbstractChitosan is a natural polymer derived from deacetylation of chitin, which exhibits properties such as biocompatibility, biodegradability and may form films, being applied in the food industry and medicine. Degradable chitosan films were prepared from chitosan extracted from shrimp shells and whey, using different concentrations of chitosan solution (1, 1.5, and 2% v/v), with (4:20, 6:20 and 8:20 v/v) whey proportions, for 4.5, 5.0 and 5.5 h at 60°C. Chitin extracted previously from shrimp shells was treated with a solution of 50% of NaOH to obtain chitosan with 80.72% deacetylation degree. This chitosan was dissolved in 1% (v/v) acetic acid, leading to the solutions that were then combined with whey. The films were characterized with infrared spectroscopy, and had thickness, density, solubility, transparency, swelling and degradability evaluated. The solubility and degradability of chitosan/whey films decreased with increasing chitosan concentration. The proportion of lactic serum affects the film swelling, and the thickness and density increased with whey relative concentration.

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Preparation and characterization of pullulan–chitosan and pullulan–carboxymethyl chitosan blended films

Cited by 281 publications

References 28 publications

Eucalyptus oil nanoemulsion-impregnated chitosan film: antibacterial effects against a clinical pathogen, Staphylococcus aureus, in vitro

Eucalyptus oil nanoemulsion-impregnated chitosan film: antibacterial effects against a clinical pathogen, Staphylococcus aureus, in vitro

Characterization of physical, mechanical, and antioxidant properties of soy protein-based bioplastic films containing carboxymethylcellulose and catechin

Síntesis y propiedades de filmes basados en quitosano/lactosuero

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