Unraveling the effect of the hydration level on the molecular mobility of nanolayered polymeric systems.
Fiche publication
Date publication
février 2015
Journal
Macromolecular rapid communications
Auteurs
Membres identifiés du Cancéropôle Est :
Pr MANO João F.
Tous les auteurs :
Borges J, Caridade SG, Silva JM, Mano JF
Lien Pubmed
Résumé
This work investigates the influence of the hydration level on the molecular mobility and glass transition dynamics of freestanding chitosan/alginate (CHT/ALG) nanolayered systems. Nonconventional dynamic mechanical analysis identifies two relaxation processes assigned to the α-relaxation of the two biopolymers, respectively, CHT and ALG, when immersed in water/ethanol mixtures. This phenomenon explains the shape memory properties of the multilayered systems induced by hydration, thus constituting promising smart materials that would be of paramount importance in a plethora of research fields, including in the biomedical and biotechnological fields.
Mots clés
glass transition, layer-by-layer multilayered systems, molecular mobility, nanolayer confinement, shape-memory polymers
Référence
Macromol Rapid Commun. 2015 Feb;36(4):405-12