title: Influence of Flexibility and Dimensions of Nanocelluloses on the Flow Properties of Their Aqueous Dispersions.
abstract: We report that the intrinsic viscosity [η] of nanocellulose dispersions can be solely expressed as a function of the aspect ratio p of the nanocellulose. Both short rod-like nanocrystalline and long spaghetti-like nanofibrillated celluloses were prepared as dispersions in water. The influence of the flexibility and dimensions of the nanocelluloses on the flow properties of their dispersions was investigated by experimental and theoretical approaches using seven nanocellulose samples with different widths (2.6-14.4 nm) and aspect ratios (23-376). As the aspect ratio of a nanocellulose increases, it becomes more flexible, and its dispersion has higher viscosity. Irrespective of the flexibility and dimensions of these nanocelluloses, the relationship between [η] and p was ρ[η] = 0.15 × p(1.9), where ρ is the density of the nanocellulose.
authors.affiliation: Department of Biomaterials Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan.
authors.forename: Reina
authors.initials: R
authors.lastname: Tanaka
authors.affiliation: Department of Biomaterials Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan.
authors.forename: Tsuguyuki
authors.initials: T
authors.lastname: Saito
authors.affiliation: Department of Biomaterials Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan.
authors.forename: Hiromasa
authors.initials: H
authors.lastname: Hondo
authors.affiliation: Department of Biomaterials Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Isogai
mesh_terms: D000465:Algorithms; D002482:Cellulose / Q000138:chemical synthesis* / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D018583:Pliability; D013499:Surface Properties; D014783:Viscosity
chemical_list: D002482:Cellulose