Solid-state characterization of chitosans derived from lobster chitin

Cervera, Mirna Fernández; Heinämäki, Jyrki; Räsänen, Markku; Maunu, Sirkka Liisa; Karjalainen, Milja; Acosta, O.M. Nieto; Colarte, Antonio Iraizoz; Yliruusi, Jouko

doi:10.1016/j.carbpol.2004.08.017

Cited by 135 publications

(60 citation statements)

References 24 publications

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“…CH was obtained by N-deacetylation of chitin from lobster (P. argus) origin in accordance with the procedure described in our earlier paper (26). Molecular weight and degree of deacetylation were 309,000 g/mol and 83%, respectively.…”

Section: Methodsmentioning

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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Section: Methodsmentioning

confidence: 99%

Effects of Spray Drying on Physicochemical Properties of Chitosan Acid Salts

et al. 2011

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“…It is insoluble in water while it readily dissolves in dilute solutions of most organic acids such as acetic, citric, tartaric acids. Chitosan gel does not undergo a substantial swelling process when placed in water; it is instead stable because the polymer itself results as being insoluble in water (Cerver et al, 2004).…”

Section: Chitosanmentioning

confidence: 99%

Development of Biopolymers as Binders for Feed for Farmed Aquatic Organisms

Paolucci¹,

Fabbrocini²,

Volpe³

et al. 2012

Aquaculture

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“…However, increase in the chitosan concentration decreases the specific surface (table1) of obtained gels. In the same way, specific surface decreases when increasing the DA of chitosan [11,[38][39][40] 00034-p.5 Figure 4 shows that chitosan aerogel consist of a porous structure. The aerogel present a form of scaffolds consisted on fibers or leafs disorderly distributed in layers showing its highly porous structure consisting of interconnected pores.…”

Section: Emm-fmmentioning

confidence: 75%

Preparation of chitosan gel

Moussaoui

Mnasri

Elaloui

et al. 2012

EPJ Web of Conferences

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Abstract. Aerogel conditioning of the chitosan makes it possible to prepare porous solids of significant specific surface. The increase in the chitosan concentration or the degree of acetylation decreases the specific surface of the synthesized chitosan gel. Whereas drying with supercritical CO 2 more effectively makes it possible to preserve the volume of the spheres of gel and to have a more significant specific surface in comparison with evaporative drying.

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Solid-state characterization of chitosans derived from lobster chitin

Cited by 135 publications

References 24 publications

Effects of Spray Drying on Physicochemical Properties of Chitosan Acid Salts

Effects of Spray Drying on Physicochemical Properties of Chitosan Acid Salts

Development of Biopolymers as Binders for Feed for Farmed Aquatic Organisms

Preparation of chitosan gel

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