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Structural and thermal study of mesomorphic dodecylammonium carrageenates

Vincekovic, M., Pustak, A., Tusek-Bozic, L., Liu, F., Ungar, G., Bujan, M., Smit, I. and Filipovic-Vincekovic, N. (2010) Structural and thermal study of mesomorphic dodecylammonium carrageenates. Journal of Colloid and Interface Science , 341 (1). pp. 117-123. ISSN 0021-9797

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Structural characteristics and thermal stability of a series of dodecylammonium carrageenates formed by stoichiometric complexation of dodecylammonium chloride and differently charged carrageenans (kappa-, iota- and lambda-carrageenan, respectively) were investigated. IR spectral analysis confirmed the electrostatic and hydrogen bond interactions between the dodecylammonium and carrageenan species. X-ray diffraction experiments show increased ordering in the complexes compared to that in the parent carrageenans. Dodecylammonium carrageenates have a layer structure, in which a polar sublayer contains layers of carrageenan chains and a nonpolar sublayer consists of conformationally disordered dodecylammonium chains electrostatically attached to the carrageenan backbone. The major factor that determines the dodecylammonium carrageenate structure is cationic surfactant, while the carrageenans moiety plays a major role in determining thermal properties. (C) 2009 Elsevier Inc. All rights reserved.

Item Type: Article
Copyright, Publisher and Additional Information: © 2009 Elsevier. This is an author produced version of a paper subsequently published in Journal of Colloid and Interface Science. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: Dodecylammonium chloride; Carrageenans; Surfactant-polymer complexes
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield)
Depositing User: Miss Anthea Tucker
Date Deposited: 15 Dec 2009 09:57
Last Modified: 08 Feb 2013 16:59
Published Version: http://dx.doi.org/10.1016/j.jcis.2009.09.021
Status: Published
Publisher: Elsevier
Refereed: Yes
Identification Number: 10.1016/j.jcis.2009.09.021
URI: http://eprints.whiterose.ac.uk/id/eprint/10252

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