Title :

Cellulose nanocrystals-starch nanocomposites produced by extrusion: Structure and behavior in physiological conditions

Author(s) :

Nessi, Veronica [Auteur]
Falourd, Xavier [Auteur]
Maigret, Jean-Eudes [Auteur]
Cahier, Karine [Auteur]
D’Orlando, Angelina [Auteur]
Descamps, Nicolas [Auteur]
Gaucher, Valerie [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Chevigny, Chloé [Auteur]
Lourdin, Denis [Auteur]

Journal title :

Carbohydrate polymers

Abbreviated title :

Carbohydrate Polymers

Pages :

115123

Publisher :

Elsevier BV

Publication date :

2019-12

ISSN :

0144-8617

HAL domain(s) :

Chimie/Matériaux
Chimie/Polymères

English abstract : [en]

Different amounts of cellulose nanocrystals (CNCs) were added to glycerol-plasticized thermoplastic starch (TPS) to obtain bio-based nanocomposites. First, nanocomposites are prepared by extrusion and their structure is ...
Show more >Different amounts of cellulose nanocrystals (CNCs) were added to glycerol-plasticized thermoplastic starch (TPS) to obtain bio-based nanocomposites. First, nanocomposites are prepared by extrusion and their structure is studied at different scales using WAXS (Wide Angle X-ray Scattering) and solid-state NMR (Nuclear Magnetic Resonance) for local/crystalline organization, AF4 (Asymmetrical Flow Field-Flow Fractionation) for molecular weight and chain length, and SEM (Scanning Electron Microscopy) for the morphology at a larger scale. Then, relevant mechanical properties and behavior in physiological conditions (swelling, enzymatic degradation) are characterized. The results show that the incorporation of cellulose nanocrystals up to 2.5 wt% causes a mechanical reinforcement as determined by DMTA (Dynamic Mechanical Thermal Analysis) and reduces the swelling and the enzymatic degradation of the materials compared to reference TPS. This could be linked to the formation of starch-cellulose hydrogen and hydroxyl bonds. Conversely, above 5 wt% CNC content nanocrystals seem to aggregate which in turn worsens the behavior in physiological conditions.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Non spécifiée

Administrative institution(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Ingénierie des Systèmes Polymères

Submission date :

2020-01-07T15:31:30Z
2020-01-13T09:56:03Z