Skip to main content


Weitere Artikel dieser Ausgabe durch Wischen aufrufen

20.02.2019 | Original Research | Ausgabe 5/2019 Open Access

Cellulose 5/2019

Influence of water on the dielectric properties, electrical conductivity and microwave absorption properties of amorphous yellow dextrin

Cellulose > Ausgabe 5/2019
Adrian Radoń, Patryk Włodarczyk
Wichtige Hinweise

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.


Electrical conductivity as well as dielectric and microwave absorption properties of yellow dextrin were described. The studied material was in the form of milled and pressed tablets. It was found that the minor addition of water (5.4 wt% of water content) significantly changes the properties of tested absorber. The shift of γ-relaxation was observed for water-saturated amorphous yellow dextrin. It was also confirmed, that the activation energy of this process has been significantly increased by a slight addition of water (0.45–0.62 eV). Mobility of water in the yellow dextrin–water system is also related to the increased conductivity of the sample. The yellow dextrin was found to be a great microwave absorber. Addition of water causes also the increase of microwave absorption properties (decrease of reflection loss from − 2.37 to − 17.29 dB and shielding efficiency from − 9.09 to − 36.84 dB for 1 cm sample thickness). Moreover, the highest absorption frequency region is being shifted by water towards lower frequencies (from 4.78 to 2.83 GHz).

Graphical abstract

Über diesen Artikel

Weitere Artikel der Ausgabe 5/2019

Cellulose 5/2019 Zur Ausgabe