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Media type:
E-Article
Title:
Obtaining and Characterizing Alginate/k-Carrageenan Hydrogel Cross-Linked with Adipic Dihydrazide
Contributor:
Paşcalău, Violeta;
Popescu, Violeta;
Popescu, George L.;
Dudescu, Mircea C.;
Borodi, Gheorghe;
Dinescu, Adrian M.;
Moldovan, Marioara
Published:
Hindawi Limited, 2013
Published in:
Advances in Materials Science and Engineering, 2013 (2013), Seite 1-12
Language:
English
DOI:
10.1155/2013/380716
ISSN:
1687-8434;
1687-8442
Origination:
Footnote:
Description:
The aim of this paper is obtaining and characterizing hydrogels based on different ratios of oxidized alginate (oA) and k-carrageenan (C), chemically cross-linked with adipic dihydrazide (adh). The alginate (A) was first oxidized with sodium metaperiodate in order to transform it into the dialdehyde derivative, a more reactive compound than alginate. A known procedure for oxidation of alginate with sodium metaperiodate in ethanol-water in order to improve alginate reactivity by transforming the hydroxyl end-groups into dialdehyde was used, preceded by a partially cleavage of the alginate chains. In the second stage, the mixture of dialdehydic derivative of oxidized alginate, k-carrageenan and glycerol subjected to reaction with adipic dihydrazide leads to a Semi-Interpenetrated Network covalently cross-linked alginate/k-carrageenan hydrogel (oACadh), based on the dihydrazone compound which is responsible for the chemical cross-linking. Pure alginate, k-carrageenan, oxidized alginate, adipic dihydrazide and the cross-linked hydrogel were characterized by: FTIR, XRD, and SEM.