title: Viscosity and flow properties of concentrated solutions of chitosan with different degrees of deacetylation.
abstract: The effects of the degree of deacetylation (DD) on the viscosity and flow behaviour of concentrated solutions of chitosan were investigated using 0.2 M CH3COOH and 0.2 M CH3COOH/0.1 M CH3COONa aqueous solutions as solvents. The results indicated that the viscosity and flow properties of the solutions differed with the DD of chitosan. The solution viscosities and the non-Newtonian flow properties as well as the flow activation energies E gamma increased with the increasing DD of chitosan. However, the additional salt decreased the viscosities and the non-Newtonian flow properties of the solutions of chitosan, but did not change the flow activation energies E gamma of the solutions.
authors.affiliation: Polymer Physics Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences.
authors.forename: W
authors.initials: W
authors.lastname: Wang
authors.forename: D
authors.initials: D
authors.lastname: Xu
mesh_terms: D000107:Acetylation; D002686:Chitin / Q000031:analogs & derivatives* / Q000737:chemistry; D048271:Chitosan; D009994:Osmolar Concentration; D012212:Rheology; D012996:Solutions; D014783:Viscosity
chemical_list: D012996:Solutions; D002686:Chitin; D048271:Chitosan