Unraveling the Effect of the Hydration Level on the Molecular Mobility of Nanolayered Polymeric Systems | Zendy

Borges João | Zendy; Caridade Sofia G. | Zendy; Silva Joana M. | Zendy; Mano João F. | Zendy

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Unraveling the Effect of the Hydration Level on the Molecular Mobility of Nanolayered Polymeric Systems

Author(s) -

Borges João,

Caridade Sofia G.,

Silva Joana M.,

Mano João F.

Publication year - 2015

Publication title -

macromolecular rapid communications

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 154

eISSN - 1521-3927

pISSN - 1022-1336

DOI - 10.1002/marc.201400568

Subject(s) - materials science , relaxation (psychology) , molecular dynamics , chemical physics , glass transition , nanotechnology , chitosan , smart material , polymer , chemical engineering , chemistry , computational chemistry , composite material , engineering , psychology , social psychology

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.

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