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    Chitosan-N-poly(ethylene glycol) brush copolymers:Synthesis and adsorption on silica surface

    Year: 2005

    Journal: European Polymer Journal 41 (2005) 2653-2662, 20100827

    Authors: Gorochovceva N., Naderi A., Dedinaite A., Makuska R.

    Last authors: R. Makuska

    Organizations: Department of Polymer Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania, Department of Chemistry, Surface Chemistry, Royal Institute of Technology, Drottning Kristinas väg 51, SE-100 44 Stockholm, Sweden

    Country: Sweden

    Chitosan-N-poly(ethylene glycol) brush copolymers with different degree of substitution (DS) were synthesized via reductive amination of chitosan by methoxy poly(ethylene glycol) (MPEG) aldehyde. Chitosan-N-MPEG copolymers were high-molecular-weight products with desirable DS; solubility and solution viscosity of those copolymers depended on the method of the synthesis of MPEG aldehyde and on DS. Synthesis of MPEG aldehyde by the use of TEMPO radical/BAIB was not suitable because of partial oxidation of methoxy groups of MPEG resulting in bifunctional PEG derivatives leading to cross-linking. Adsorption studies of chitosan-N-MPEG graft copolymers on silica surface show that these polymers adsorb in highly hydrated layers.