Rheological behavior of carboxymethylcellulose and cellulose nanocrystal aqueous dispersions

This study investigated the rheological properties of cellulose nanocrystal (CNC) suspensions in carboxymethylcellulose (CMC) polymer solutions by studying steady shear viscosities, linear viscoelastic behaviors, applicability of the Cox–Merz rule, and time-dependent behavior. The rheological measur...

Full description

Saved in:
Bibliographic Details
Published in:Rheologica acta 2021-09, Vol.60 (9), p.497-509
Main Authors: da Fonsêca, Jéssica Heline Lopes, d’Ávila, Marcos Akira
Format: Article
Language:English
Subjects:
Cellulose
Characterization and Evaluation of Materials
Chemistry and Materials Science
Complex Fluids and Microfluidics
Crystal structure
Crystallinity
Depletion
Domains
Flocculation
Food Science
Liquid crystals
Materials Science
Mechanical Engineering
Nanocrystals
Optical microscopy
Optical properties
Original Contribution
Polymer Sciences
Rheological properties
Rheology
Shear thinning (liquids)
Soft and Granular Matter
Thixotropy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study investigated the rheological properties of cellulose nanocrystal (CNC) suspensions in carboxymethylcellulose (CMC) polymer solutions by studying steady shear viscosities, linear viscoelastic behaviors, applicability of the Cox–Merz rule, and time-dependent behavior. The rheological measurement showed that interactions between CNC and CMC resulted in liquid crystalline domains and a substantial increase in viscosity, shear-thinning, elasticity, and thixotropy. Depletion flocculation formed a percolated structure of liquid crystalline domains, resulting in a gel-like structure, which was evidenced by polarized optical microscopy. The strong effects on rheological properties by mixing small quantities of CMC and CNC suggest that this system may find applications where tunable rheological properties of aqueous polymeric systems are desirable. Graphical abstract
ISSN:0035-4511
1435-1528
DOI:10.1007/s00397-021-01292-2