Over the past decade, research on the development of new chitosan-based bio-source materials has continued to increase. Interest in this renewable amino-polysaccharide comes from its biocompatible, biodegradable or antibacterial properties. Chitosan (CTS) is a deacetylated (&gt; 50%) chitin, the second most abundant biopolymer on earth; primarily from crustacean shells, but also fungal biomass and insect cuticles). Unmodified CTS has been reported to exhibit some beneficial properties for water and wastewater treatment, medical, cosmetic or agriculture applications. As such, recent research has focused on the modification of CTS to improve and tune its properties; improved solubility in organic solvents, miscibility with other matrices or affinity for molecules of interest, producing innovative materials with specific properties. Controlled radical polymerization (CRP) is a powerful tool for designing new CTS-based materials grafted with well-defined and functional (co)polymers. Phosphorous-containing polymers are a class of synthetic polymers that have been the focused of interest for the materials community due to their unique and interesting properties. They are found in a wide range of applications, including biomedical, metal complexation, fire retardant additives, fuel cell membranes, etc. In this work, we described the synthesis of hybrid material (bio-/synthetic polymers) obtained by graft modification of CTS, from the primary hydroxyl group, with poly(dimethyl(methacryloyloxy)methyl phosphonate) (PMAPC1) via grafting tousing nitroxide-mediated polymerization (NMP). First, well defined PMAPC1 was prepared via NMP with the blocbuilderTMalkoxyamine. Separately, CTS was functionalized with glycidyl methacrylate (GMA). Finally, PMAPC1 was grafted onto CTS-GMA via intermolecular radical 1,2-addition in aqueous media. The reversible complexation of CTS-GMA with sodium dodecylbenzenesulfonate (SDBS) allowed the grafting toreaction to be performed also in organic solvent.

Graft-modification of chitosan biopolymer with phosphonated polymer via nitroxide-mediated polymerization

2019 Fall National Meeting

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