title: TEMPO-oxidized nanocellulose participating as crosslinking aid for alginate-based sponges.
abstract: Crosslinked polysaccharide sponges have been prepared by freeze-drying of amorphous alginate-oxidized nanocellulose in the presence of a Ca(2+) ionic crosslinking agent. The new carboxyl groups on the surface of nanocellulose induced by the chemical oxidization provided the possibility of participating in the construction of an alginate-based sponge's structure and played a fundamental role in the structural and mechanical stability of ensuing sponges. Furthermore, enhanced mechanical strength induced by oxidized cellulose nanocrystals and the formation of a semi-interpenetrating polymer network from oxidized microfibrillated cellulose were reported. Together with the facile and ionic crosslinking process, the ultrahigh porosity, promising water absorption and retention, as well as the improved compression strength of the crosslinked sponges should significantly extend the use of this soft material in diverse practical applications.
authors.affiliation: Grenoble Institute of Technology (Grenoble INP), The International School of Paper, Print Media, and Biomaterials (Pagora), BP65, 38402 Saint Martin d'Hères Cedex, France.
authors.forename: Ning
authors.initials: N
authors.lastname: Lin
authors.forename: Cécile
authors.initials: C
authors.lastname: Bruzzese
authors.forename: Alain
authors.initials: A
authors.lastname: Dufresne
mesh_terms: D000042:Absorption; D000464:Alginates / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D003497:Cyclic N-Oxides / Q000737:chemistry*; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction; D016062:Porosity; D014867:Water / Q000737:chemistry
chemical_list: D000464:Alginates; D003497:Cyclic N-Oxides; D006603:Hexuronic Acids; D014867:Water; D020723:Glucuronic Acid; D002482:Cellulose; C003959:TEMPO