Current Progress in Rheology of Cellulose Nanofibril Suspensions
Artikel i vetenskaplig tidskrift, 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.

films

water suspensions

barrier

flow properties

cellulose

complex fluids

morphological

properties

microfibrillated cellulose

Polymer Science

native

viscoelastic properties

wall depletion

Biochemistry & Molecular Biology

optical coherence tomography

Chemistry

Författare

Oleksandr Nechyporchuk

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi

M. N. Belgacem

Université Grenoble Alpes

F. Pignon

Université Grenoble Alpes

Biomacromolecules

1525-7797 (ISSN) 1526-4602 (eISSN)

Vol. 17 2311-2320

Ämneskategorier

Polymerkemi

Organisk kemi

DOI

10.1021/acs.biomac.6b00668

PubMed

27310523