Current Progress in Rheology of Cellulose Nanofibril Suspensions
Review article, 2016
Cellulose nanofibrils (CNFs) are produced and commonly used in the form of aqueous suspensions or gels. A number of studies have focused lately on rheological properties of CNF suspensions, which gives insight into properties of such materials and can reflect their behavior during handling. This Review summarizes the recent progress in rheological studies on CNF aqueous suspensions using rotational rheometry. Here, we discuss linear viscoelastic properties, i.e., frequency-dependent storage and loss moduli; shear flow behavior, i.e., apparent viscosity and shear stress as a function of shear rate; local flow characteristics, etc. In this Review, we point out that the rheological behavior of at least two types of CNF suspensions should be distinguished: (i) ones produced using mechanical fibrillation with or without enzymatic pretreatment (no surface chemical modification), which possess highly flocculated structure, and (ii) ones produced involving chemical modification pretreatments, e.g., carboxylation, carboxymethylation, quaternization, or sulfonation, which possess better colloidal stability and do not evidently flocculate.
water suspensions
morphological
properties
cellulose
flow properties
Polymer Science
complex fluids
viscoelastic properties
native
barrier
optical coherence tomography
Biochemistry & Molecular Biology
Chemistry
microfibrillated cellulose
films
wall depletion
Author
Oleksandr Nechyporchuk
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
M. N. Belgacem
Grenoble Alpes University
F. Pignon
Grenoble Alpes University
Biomacromolecules
1525-7797 (ISSN) 1526-4602 (eISSN)
Vol. 17 7 2311-2320Subject Categories
Polymer Chemistry
Organic Chemistry
DOI
10.1021/acs.biomac.6b00668
PubMed
27310523