Polyelectrolyte complexes between (crosslinked) N-carboxyethylchitosan and (quaternized) poly[2-dimethylamino)ethyl methacrylate: preparation, characterization and antibacterial properties
[en] Novel polyelectrolyte complexes (PECs) between N-carboxyethylchitosan (CECh) and well-defined (quaternized) poly[2-(dimethylamino)ethyl methacrylate] (PDMAEMA) have been obtained. The modification of chitosan into CECh allows the preparation of PECs in a pH range in which chitosan cannot form complexes. The CECh/PDMAEMA complex is formed in a narrow pH range around 7. The quaternization of the tertiary amino groups of PDMAEMA enables complex formation with CECh both in neutral and in alkaline medium. Cross-linked CECh is also capable of forming complexes with (quaternized) PDMAEMA. The antibacterial activity of (cross-linked) CECh, (quaternized) PDMAEMA, and their complexes against Escherichia coli has been evaluated. In contrast to (quaternized) PDMAEMA, (cross-linked) CECh exhibits no antibacterial activity. The complex formation between cross-linked CECh and (quaternized) PDMAEMA results in a loss of the inherent antibacterial activity of the latter in neutral medium. In acidic medium, the complexes exhibit strong antibacterial activity due to complex disintegration and release of (quaternized) PDMAEMA.
Dubois, Philippe ; Université de Mons > Faculté des Sciences > Matériaux Polymères et Composites
Manolova, Nevena
Rashkov, Iliya
Language :
English
Title :
Polyelectrolyte complexes between (crosslinked) N-carboxyethylchitosan and (quaternized) poly[2-dimethylamino)ethyl methacrylate: preparation, characterization and antibacterial properties
Publication date :
12 March 2007
Journal title :
Biomacromolecules
ISSN :
1525-7797
eISSN :
1526-4602
Publisher :
American Chemical Society, United States - District of Columbia
Volume :
8
Issue :
3
Pages :
976-984
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S816 - Matériaux Polymères et Composites
Research institute :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
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