Title :
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
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;
Conference_Titel :
Electrets, 1999. ISE 10. Proceedings. 10th International Symposium on
Conference_Location :
Athens
Print_ISBN :
0-7803-5025-1
DOI :
10.1109/ISE.1999.832157
