Physicochemical and dielectric study of the hydration mechanism in polysaccharides

Author

Vartzeli-Nikaki, P. ; Daoukaki, D. ; Konsta, A.A. ; Pissis, P.

Author_Institution

Dept. of Phys., Nat. Tech. Univ. of Athens, Greece

fYear

1999

fDate

1999

Firstpage

769

Lastpage

772

Abstract

In this work, the hydration mechanism of soluble starch has been investigated by means of equilibrium water sorption and desorption isotherms, and of thermally stimulated depolarization currents (TSDC) techniques in the temperature range 77-300 K. The water content, h, of the samples was varied between 0 and 0.39 g of water/g of dry sample. The results of equilibrium water sorption measurements were analyzed by means of the Guggenheim-Anderson-De Boer (GAB) equation in terms of bound and clustered water. Two TSDC peaks were observed and the dependence of their characteristics on water content was studied

Keywords

desorption; polymers; solvation; thermally stimulated currents; 77 to 300 K; Guggenheim-Anderson-De Boer equation; desorption; equilibrium water sorption; hydration mechanism; polysaccharides; soluble starch; thermally stimulated depolarization currents; water content; Absorption; Chemical analysis; Data analysis; Dielectric loss measurement; Dielectric losses; Dielectric measurements; Equations; Nonhomogeneous media; Temperature distribution; Water;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1999. ISE 10. Proceedings. 10th International Symposium on

Conference_Location

Athens

Print_ISBN

0-7803-5025-1

Type

conf

DOI

10.1109/ISE.1999.832157

Filename

832157