Chitin and Chitosan for Versatile Applications

Dutta, Pradip Kumar; Ravikumar, M; Dutta, Joydeep

doi:10.1081/mc-120006451

Cited by 254 publications

(172 citation statements)

References 153 publications

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“…This polysaccharide is produced by de-N-acetylation of chitin. Due to its unique functional and biomedical properties, industrial application of chitosan is wide and is ranging from pharmaceutical and cosmetic products, textile and paper industry to water engineering and plant protection (Dutta et al 2004). Biodegradation and compatibility with other substances forming edible coatings make chitosan a very valuable polymer for application in food packaging.…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Activity and Physical Properties of Edible Chitosan Films Exposed to Low-pressure Plasma

Ulbin-Figlewicz

Zimoch-Korzycka

Jarmoluk

2014

Food Bioprocess Technol

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The challenge for food industry is developing gentle processes concept, which will prevent food spoilage and leave a food natural, minimally processed, fresh-like and safe. A new technique of food preservation could be usage of combined methods of green process, such as cold gas plasma with bioactive substances, and protective coatings. The aim of this study was to determine the antibacterial activity of chitosan films incorporated with lysozyme exposed to helium plasma treatment as well as evaluate their physical properties. The edible films have been prepared basing on low molecular weight chitosan by casting from lactic acid solution with water solution of lysozyme in three various concentrations (0, 0.5 and 1 %). Dried films were then modified by exposition on cold helium plasma treatment for 0, 5 and 10 min. Obtained films were tested against growth of Listeria monocytogenes, Yersinia enterocolitica and Pseudomonas fluorescens. In order to characterize chitosan-based films, their mechanical properties, theromogravimetric analysis (TGA), dynamic mechanical thermal analysis (DMTA), contact angle measurement, water vapour permeability (WVP) and scanning electron microscopy (SEM) were evaluated. The films with 1 % lysozyme incorporation enhanced the inhibition efficiency of chitosanbased films against gram-positive (L. monocytogenes) and gram-negative (P. fluorescens) bacteria, where reduction zones were 42.5 and 69.8 mm, respectively. Besides that, hydrolytic changes of chitosan chain caused by lysozyme activity were confirmed by TGA and DMTA. Contact angles and WVP of tested films were not significantly affected by helium plasma exposition, nor lysozyme dosage. Hydrophilic natures of chitosan-based films were confirmed by both tests.Microscopy image of cross-section structure was smooth and continuous due to lysozyme addition in film composition. Application of chitosan films incorporated with lysozyme and low-pressure plasma treatment could be used as innovative preservation method in a wide range of food products.

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Section: Introductionmentioning

confidence: 99%

Antibacterial Activity and Physical Properties of Edible Chitosan Films Exposed to Low-pressure Plasma

Ulbin-Figlewicz

Zimoch-Korzycka

Jarmoluk

2014

Food Bioprocess Technol

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“…Chitosan (CH) has gained increasing interest as a safe excipient and functional material in many fields including pharmaceutical, food, cosmetics, biomedical, agricultural, paper, textile, and water treatment industries (1)(2)(3). Chitosan is a basic polymer of helix structure with reactive amine groups, which gives a lot of possibilities for modification and ionic interactions (4).…”

Section: Introductionmentioning

confidence: 99%

Effects of Spray Drying on Physicochemical Properties of Chitosan Acid Salts

et al. 2011

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Abstract. The effects of spray-drying process and acidic solvent system on physicochemical properties of chitosan salts were investigated. Chitosan used in spray dryings was obtained by deacetylation of chitin from lobster (Panulirus argus) origin. The chitosan acid salts were prepared in a laboratory-scale spray drier, and organic acetic acid, lactic acid, and citric acid were used as solvents in the process. The physicochemical properties of chitosan salts were investigated by means of solid-state CP-MAS 13 C nuclear magnetic resonance (NMR), X-ray powder diffraction (XRPD), differential scanning calorimetry, and Fourier transform infrared spectrometry (FTIR) and near-infrared spectroscopy. The morphology of spray-dried chitosan acid salts showed tendency toward higher sphericity when higher temperatures in a spray-drying process were applied. Analysis by XRPD indicated that all chitosan acid salts studied were amorphous solids. Solid-state 13 C NMR spectra revealed the evidence of the partial conversion of chitosan acetate to chitin and also conversion to acetyl amide form which appears to be dependent on the spray-drying process. The FTIR spectra suggested that the organic acids applied in spray drying may interact with chitosan at the position of amino groups to form chitosan salts. With all three chitosan acid salts, the FTIR bands at 1,597 and 1,615 cm −1 were diminished suggesting that -NH groups are protonated. The FTIR spectra of all chitosan acid salts exhibited ammonium and carboxylate bands at 1,630 and 1,556 cm −1 , respectively. In conclusion, spray drying is a potential method of preparing acid salts from chitosan obtained by deacetylation of chitin from lobster (P. argus) origin.

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“…One of the main problems encountered with the blending of two polymers is its compatibility, which is dependent upon the formation of interand intramolecular interaction between the macromolecules. Compared to cellulose, the reactivity of chitosan is more versatile due to the presence of NH 2 groups [17]. The blending of these two polymers could be a prospective way to their modification and improving the properties of the final products.…”

Section: Introductionmentioning

confidence: 99%

Blending of Cellulose and Chitosan in Alkyl Imidazolium Ionic Liquids

Kuzmina

Heinze

Wawro

2012

ISRN Polymer Science

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The production of cellulose/chitosan blends in alkyl imidazolium ionic liquids (ILs) was studied in this work. Selected organic solvents, such as dimethyl sulfoxide, ethyl acetate, and diethyl ether, were used as cosolvents. The addition of cosolvents decreased the viscosity of cellulose/chitosan solutions in ILs and facilitated the dissolution of polysaccharides, thereby decreasing the E act and polymer aggregates sizes in the solutions. The cellulose/chitosan films were produced from the studied solutions. The presence of one of cosolvent and ILs in the blended films was confirmed by FTIR spectroscopy. The blended film is stronger than pure cellulose film, and the addition of cosolvents has an influence on its mechanical properties.

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Chitin and Chitosan for Versatile Applications

Cited by 254 publications

References 153 publications

Antibacterial Activity and Physical Properties of Edible Chitosan Films Exposed to Low-pressure Plasma

Antibacterial Activity and Physical Properties of Edible Chitosan Films Exposed to Low-pressure Plasma

Effects of Spray Drying on Physicochemical Properties of Chitosan Acid Salts

Blending of Cellulose and Chitosan in Alkyl Imidazolium Ionic Liquids

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