Summary
The effect of ionic strength (0.1 M ≤ [Cl] ≤0.4M), pH (3.0 ≤ pH≤ 5.0) and shear rate (up to 1000 sec−1) on the rheological response of concentrated chitosan solutions have been studied. It has been observed that viscosity increases with increasing chitosan concentration and that a shear thinning behavior is present for polymer concentrations above 0.50 g/dl. Also, it has been shown that the zero shear viscosity is independent of the ionic strength of the media, but increases as pH is increased. This behavior has been related to the role of the surface charge density on the chitosan backbone upon the intermolecular entanglement which control the rheological behavior of concentrated chitosan solutions.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
R.A.A. Muzzarelli, Enzyme Microb. Technol. 2, 177 (1980).
D. Knorr, Food Technol. 1, 85 (1984).
C.A. Kienzle-Sterzer, D. Rodriguez-Sanchez and C.K. Rha, J. Appl. Polym. Sci. 27, 4467 (1982).
L.A. Berkovich, G.I. Timofeyeva, M.P. Tsyurupa, and V.A. Davankov, Vysokomol. Soedin., Ser. A 22, 1834 (1980).
S.A. Rice and M. Nagasawa, in “Polyelectrolyte Solutions,” Academic Press, New York (1961).
D. Rodriguez-Sanchez, C.A. Kienzle-Sterzer and C.K. Rha, in “Proc. 2nd. Int. Conf. on Chitin and Chitosan” ed. by S. Hirano and S. Tokura, The Japanese Society of Chitin and Chitosan, Tottori, 30 (1982).
C.A. Kienzle-Sterzer, Ph.D. Thesis, Massachusetts Institute of Technology, Cambridge (1984).
D. Rodriguez-Sanchez, S.M. Thesis, Massachusetts Institute of Technology, Cambridge (1983).
J.G. Southwick, A.M. Jamieson and J. Blackwell, Carbohydr. Res. 99, 117 (1983).
J.G. Southwick, A.M. Jamieson and J. Blackwell, J. Appl. Polym. Sci., Appl. Polym. Symp. 37, 385 (1983).
P.J. Whitcomb and C.W. Maccoko, J. Rheol. 22, 493 (1978).
R. Seale, E.R. Morris, and Rees, D.A., Carbohydr. Res. 110, 101 (1982).
C.A. Kienzle-Sterzer, D. Rodriguez-Sanchez and C.K. Rha, Polym. Bull. (Berlin) 11, 185 (1984).
R. Simha, J. Appl. Phys. 23, 1020 (1952).
L.A. Utracki and R. Simha, J. Polym. Sci., Part A. 1, 1089 (1963).
V.E. Dreval, A. Ya. Malkin and G.O. Botvinnik, J. Polym. Sci., Polym. Phys. Ed. 11, 1055 (1973).
V.E. Dreval, A. Ya. Malkin and G.O. Botvinnik, Eur. Polym. J. 9, 85 (1973).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kienzle-Sterzer, C.A., Rodriguez-Sanchez, D. & Rha, C.K. Flow behavior of a cationic biopolymer: Chitosan. Polymer Bulletin 13, 1–6 (1985). https://doi.org/10.1007/BF00264233
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00264233