Article Dans Une Revue Carbohydrate Polymers Année : 2024

Multiscale structure of cellulose microfibrils in regenerated cellulose fibers

Résumé

Cellulose in solution can be assembled into textile fibers by wet-spinning (Viscose etc.) or dryjet wet-spinning (Lyocell, Ioncell etc.), which lead to significant differences in the mechanical properties of fibers. We use scanning X-ray microdiffraction (SXM) to reveal in unprecedented detail the arrangement of cellulose fibrils in the "skin-core" morphology of the fibers. The cellulose elementary fibrils have a ribbon-like cross sectional shape of about 6 x 2 nm, which are packed into microfibrils (MFs) ~ 100 nm in diameter. Our SXM studies demonstrate that MFs within Ioncell fibers are composed of elementary fibrils with homogeneous morphologies.

Furthermore, the stacking of cellulose molecular sheets within elementary fibrils of Viscose fibers is preferentially along the 010 direction, while those of Ioncell fibers preferably stack in the 1-10 direction. The better structural regularities of elementary fibrils give Ioncell fibers mechanical properties and a wet strength far superior to those of Viscose fibers.

Fichier principal
Vignette du fichier
RCF_manuscript_CARBPOL_rv.pdf (1) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04876845 , version 1 (09-01-2025)

Identifiants

Citer

Jiliang Liu, Herbert Sixta, Yu Ogawa, Michael Hummel, Michael Sztucki, et al.. Multiscale structure of cellulose microfibrils in regenerated cellulose fibers. Carbohydrate Polymers, 2024, 324, pp.121512. ⟨10.1016/j.carbpol.2023.121512⟩. ⟨hal-04876845⟩
0 Consultations
0 Téléchargements

Altmetric

Partager

More