Abstract
Rheology was used to study the microstructure of cellulose nanocrystal suspensions and hydrogels before, during, and after disturbance. Rheological testing is classified into two types: linear and nonlinear tests. These tests can be carried out with either oscillatory or rotational shear deformations. This manuscript includes recent research on cellulose nanocrystals using rheology to familiarize readers with the generality of these nanoparticles and their flow behavior in aqueous media, as well as to provide a comprehensive overview of current efforts in the literature addressing these materials.