Fine microstructure of processed chitosan nanofibril networks preserving directional packing and high molecular weight - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Carbohydrate Polymers Année : 2015

Fine microstructure of processed chitosan nanofibril networks preserving directional packing and high molecular weight

Résumé

Crystalline chitosan nanofibril networks were prepared, preserving the native structural packing and the polymer high molecular weight. The fine microstructure of the nanomaterial, obtained by mild hydrolysis of chitosan (CHI), was characterized by using synchrotron small-and wide-angle X-ray scattering (SAXS and WAXS), transmission electron microscopy (TEM) and electron diffraction. Hydrolysis of chitosan yielded a network of crystalline nanofibrils, containing both allomorphs of chitosan: hydrated and anhydrous. The comparison of WAXS data in transmission and reflection mode revealed the preferential orientation of the CHI crystals when subjected to mechanical compression constrains. The results are in agreement with the existence of a network nanostructure containing fiber-like crystals with the principal axis parallel to the polymer chain axis. The evolution of the CHI allomorphic composition with temperature was studied to further elucidate the mechanism of structural transitions occurring during CHI nanofibril network processing.
Fichier non déposé

Dates et versions

hal-01222269 , version 1 (29-10-2015)

Identifiants

Citer

Anayancy Osorio-Madrazo, Laurent David, Carlos Peniche-Covas, Cyrille Rochas, Jean-Luc Putaux, et al.. Fine microstructure of processed chitosan nanofibril networks preserving directional packing and high molecular weight. Carbohydrate Polymers, 2015, 131, pp.1-8. ⟨10.1016/j.carbpol.2015.05.011⟩. ⟨hal-01222269⟩
137 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More