title: Rheological properties of deionized Chinese ink.
abstract: Rheological properties for Chinese ink in exhaustively deionized aqueous media were carefully examined. In the steady shear measurement, the shear viscosities of the ink could be well explained by considering the "effective" volume fraction of the particles in the ink including the electrical double layers and by using Einstein's equation for dilute suspension viscosity, when the particle volume fraction was substantially low. In the case that the volume fraction was higher, the shear viscosities showed extremely higher than those from Einstein's prediction, though the ink remained a Newtonian liquid. In the stress-strain measurement, the shear moduli were observed at strain smaller than 0.2. The "weak" aggregation among the particles in the ink under no shear or low shear rates was supported. It should be noted that the glue in the suspension plays an important role for the good liquidity of the ink and for the "weak" bridges among the particles resulting its good dispersion stability.
authors.affiliation: Department of Applied Chemistry and Graduate School of Materials Science, Gifu University, Gifu 501-1193, Japan. hkimura@apchem.gifu-u.ac.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kimura
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Nakayama
authors.forename: Akira
authors.initials: A
authors.lastname: Tsuchida
authors.forename: Tsuneo
authors.initials: T
authors.lastname: Okubo
mesh_terms: D002244:Carbon / Q000737:chemistry*; D003102:Colloids / Q000737:chemistry; D007475:Ion Exchange Resins / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D012212:Rheology; D033081:Shear Strength; D012965:Sodium Chloride / Q000737:chemistry; D013535:Suspensions / Q000737:chemistry; D014783:Viscosity; D014867:Water / Q000737:chemistry
chemical_list: D003102:Colloids; D007475:Ion Exchange Resins; D013535:Suspensions; C028433:chinese ink; D014867:Water; D012965:Sodium Chloride; D002244:Carbon