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Titre: Synthesis and rheological properties of magnetic chitosan hydrogel
Auteur(s): Ikhaddalene, Soumia
Zibouche, Fatima
Ponton, Alain
Irekti, Amar
Carn, Florent
Mots-clés: Chitosan
Gelation process
Rheological behavior
Mechanical spectroscopy
Date de publication: 2021
Editeur: Budapest University of Technology and Economics
Collection/Numéro: Periodica Polytechnica Chemical Engineering/ Vol.65, N°3 (2021);pp. 378-388
Résumé: The aim of the present work is first to synthesis a magnetic chitosan hydrogel (chitosan ferrogel) using the blending method and second to study it rheological behavior. Magnetic components ( maghemite particles γ-Fe 2 O  ) were synthesized via a simple chemical co-precipitation route also called Massart's procedure. Before being dispersed in chitosan network, γ-Fe 3 2 O particles were covered with a cationic polyelectrolyte (Polydiallyldimethylammonium chloride; PDADMAC) and the exact quantity required to cover the entire surface of maghemite particles was determined by Electrophoretic mobility. The successful functionalization of maghemite particles was confirmed by zeta potential measurement. The prepared ferrogel was gelified using glyoxal as crosslinking agent. The effect of continuous magnetic field on rheological properties of the elaborated ferrogel was studied, under controlled temperature before and after the gelation process, using a rotating rheometer fitted with a new magneto-rheological cell. Moreover the influence of iron oxide content on the gelation time of magnetic hydrogel was studied by comparing two ferrogels with different maghemite particles content. Flow and viscoelastic measurements showed that applying magnetic field facilitates the formation of a new structure (columnlike arrangements), which was confirmed by in situ optical microscopic observation. Kinetic study was investigated by mechanical spectroscopy and demonstrates that the gelation time depends on both iron oxides content and magnetic field
URI/URL: DOI 10.3311/PPch.17148
http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/7507
ISSN: 03245853
Collection(s) :Publications Internationales

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