论文信息 - Viscosity and flow properties of concentrated solutions of chitosan with different degrees of deacetylation.

Viscosity and flow properties of concentrated solutions of chitosan with different degrees of deacetylation.

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.

[1] M. Rinaudo,et al. Preparation and characterization of fully deacetylated chitosan , 1983 .

[2] J. Hermans,et al. Light scattering and viscosities of chitosan in aqueous solutions of sodium chloride , 1959 .

[3] S. Bo,et al. INFLUENCE OF THE DEGREE OF DEACETYLATION OF CHITOSAN ON ITS MARK-HOUWINK EQUATION PARAMETERS , 1991 .

[4] C. Rha,et al. Dilute solution behavior of a cationic polyelectrolyte , 1982 .

[5] G. Roberts,et al. Determination of the viscometric constants for chitosan , 1982 .

[6] S. Aiba. Studies on chitosan: 2. Solution stability and reactivity of partially N-acetylated chitosan derivatives in aqueous media. , 1989, International journal of biological macromolecules.

[7] S. Bo,et al. Determination of the Mark-Houwink equation for chitosans with different degrees of deacetylation. , 1991, International journal of biological macromolecules.