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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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