Chitosan coating surface properties as affected by plasticizer, surfactant and polymer concentrations in relation to the surface properties of tomato and carrot

Casariego, Alicia; Souza, B. W. S.; Vicente, António A.; Teixeira, J. A.; Cruz, Luís; Díaz, Raú l

doi:10.1016/j.foodhyd.2007.09.010

Cited by 107 publications

(86 citation statements)

References 27 publications

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“…[11,12] The addition of nanoclay into chitosan slightly lowered the degradation temperature. No melting peak of chitosan was observed showing the amorphous structure of the chitosan used in this study.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Barrier Properties of Chitosan‐Layered Silicate Nanocomposite Films

Oğuzlu

Tıhmınlıoğlu

2010

Macromolecular Symposia

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Summary: In this study, chitosan nanocomposite films were prepared using a solvent-casting method by incorporation of an organically modified montmorillonite (Cloisite 10A). The effect of filler concentration on the water vapor permeability, oxygen permeability, mechanical and thermal properties of the composite films was evaluated. The structure of nanocomposites and the state of intercalation of the clay were characterized by XRD. The water vapor permeability of pure chitosan films was measured as a function of relative humidity (RH). It was found that the permeability value increased with an increase in RH. The water vapor and gas permeability values of the composite films decreased significantly with increasing filler concentration. Permeation data was fitted to various phenomenological models predicting the permeability of polymer systems filled with nanoclays as a function of clay concentration and aspect ratio of nanoplatelets. According to the XRD results, an increase in basal spacing was obtained with respect to pure clay for chitosan/clay nanocomposites. This demonstrated the formation of intercalated structure of clay in the polymer matrix. Tensile strength and elongation at break of the composites increased significantly with the addition of clay, however the thermal and color properties of the films were not much affected by the intercalation of clay into polymer matrix.

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Section: Resultsmentioning

confidence: 99%

Preparation and Barrier Properties of Chitosan‐Layered Silicate Nanocomposite Films

Oğuzlu

Tıhmınlıoğlu

2010

Macromolecular Symposia

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“…Edible and biodegradable films are always not meant for total replacement of the synthetic packaging films (Krochta and Johnston 1997). The most commonly occurring and applied natural polymers include polysaccharides (starch, cellulose and its derivatives, chitosan, alginate, gellan gum), proteins (collagen, zein, soybean and gluten proteins, milk proteins) and fats (bee wax, candelilla wax, carnauba wax, fatty acids, glycerols) (Donhowe and Fennema 1993;Park et al 1994;Nussinovitch and Hershko 1996;Ayranci and Tunc 1997;Xie et al 2002;Pommet et al 2003;Bravin et al 2006;Casariego et al 2008 andSaucedoPompa et al 2009). Films prepared with these polymers, are generally biodegradable, nontoxic, and some of them are effective barriers to oxygen and carbon dioxide.…”

Section: Introductionmentioning

confidence: 99%

Development of chitosan based edible films: process optimization using response surface methodology

2014

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Three-factors Box-Behnken design of response surface methodology (RSM) was used to optimize chitosan level (1.5, 2.0, 2.5 %w/v), glycerol level (0.5, 0.75, 1.0 %w/v) and drying temperature (35, 40, 45°C) for the development of chitosan based edible films. The optimization was done on the basis of different responses viz. thickness, moisture, solubility, colour profile (L*, a*, b* value), penetrability, density, transmittance and water vapor transmission rate (WVTR). The linear effect of chitosan was significant (p<0.05) on all the responses. However, density was only significantly (p<0.05) affected by glycerol in a negative linear fashion. Drying temperature also significantly (p<0.05) affected thickness, penetrability, transmittance and WVTR in linear terms. The quadratic regression coefficient of chitosan showed a significant effect (p<0.05) on moisture, solubility and WVTR; glycerol level on moisture, L* value and transmittance; and drying temperature on a* value, penetrability, transmittance and WVTR. The effect of interaction of glycerol x temperature as well as chitosan x temperature was also significant (p<0.05) on a* value and WVTR of edible films. The optimized conditions were: 2.0 % w/v chitosan level, 0.75 % w/v glycerol level and drying temperature 40°C at a constant time of 48 h. All the response variables were in favourable range including thickness; 108.59 mμ, penetrability; 16.41 N, transmittance; 75.60 %, WVTR; 0.00174 g/m 2 -t for the optimized edible film. Results concluded that edible films with desirable bio-mechanical properties can be successfully developed and effectively utilized in the food packaging industry.

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“…32 In most studies, a nonionic surfactant was used in essential oil film-forming solution to achieve solubility of oil and to make homogeneous film solution. [33][34][35] Instead, these can be formulated into emulsion based film formation to have more stability and homogeneous solution.…”

Section: Introductionmentioning

confidence: 99%

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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Chitosan coating surface properties as affected by plasticizer, surfactant and polymer concentrations in relation to the surface properties of tomato and carrot

Cited by 107 publications

References 27 publications

Preparation and Barrier Properties of Chitosan‐Layered Silicate Nanocomposite Films

Preparation and Barrier Properties of Chitosan‐Layered Silicate Nanocomposite Films

Development of chitosan based edible films: process optimization using response surface methodology

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

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