title: Rheological properties and gelation of aqueous cellulose-NaOH solutions.
abstract: The shear rheology of a microcrystalline cellulose dissolved in a 9% NaOH aqueous solution was studied in the steady and oscillatory modes. The cellulose-(9% NaOH-H(2)O) mixtures show not to be true solutions. In the dilute regime, with cellulose concentration below 1%, the rheological behavior is typical of the one of suspensions. The formation of cellulose aggregates is favored when temperature is increased. In the semidilute regime, an irreversible aggregate-based gelation occurs, being faster with increasing temperature.
authors.affiliation: Ecole des Mines de Paris, Centre de Mise en Forme des Matériaux, UMR CNRS/Ecole des Mines No 7635, BP 207, 06904 Sophia-Antipolis, France.
authors.forename: Cédric
authors.initials: C
authors.lastname: Roy
authors.forename: Tatiana
authors.initials: T
authors.lastname: Budtova
authors.forename: Patrick
authors.initials: P
authors.lastname: Navard
mesh_terms: D002482:Cellulose / Q000737:chemistry*; D012212:Rheology; D012972:Sodium Hydroxide / Q000737:chemistry*; D012996:Solutions
chemical_list: D012996:Solutions; D012972:Sodium Hydroxide; D002482:Cellulose