Publication detail

Dynamic mechanical analysis of agarose hydrogels and its relationship to shear oscillation

KADLEC, M. SMILEK, J. PEKAŘ, M.

Original Title

Dynamic mechanical analysis of agarose hydrogels and its relationship to shear oscillation

Type

conference paper

Language

English

Original Abstract

Hydrogels are materials, which offers a number of usage due to its unique properties such a biocompatibility or high water content. They might be utilized in wound dressing, tissue engineering or extracellular matrix modelling. For each application, materials with different characteristics are desired. Therefore, rheology characterization is essential in case of hydrogel studies. Besides more common shear rheology, dynamic mechanical analysis can provide a useful information about the material viscoelastic behaviour. In this case, an ability to resist to deformation is in form of tension/compression contrary to shear deformation in shear rheology. In this study, strain sweep testing both in shear as well as in DMA mode is studied on the agarose hydrogel. Besides comparison between these two approaches including Poisson’s ratio, some other variables, which can influence results, are discussed. Particularly, axial force during measurement and/or different measuring geometries were studied. Regarding to results, even small changes in axial force can have a significant impact on the viscoelastic modulus values. Therefore, control axial force measurement are preferred over the gap control measurement. Moreover, using the same geometry systems during measurement is essential in order to obtain valid and comparable results.

Keywords

Agarose, hydrogels, dynamic mechanical analysis, shear oscillation

Authors

KADLEC, M.; SMILEK, J.; PEKAŘ, M.

Released

26. 7. 2023

Publisher

AIP Publishing Conference Proceedings

Location

Melville, New York, 2023

ISBN

978-0-7354-4547-5

Book

Novel Trends in Rheology IX

ISBN

0094-243X

Periodical

AIP conference proceedings

Year of study

2997

Number

1

State

United States of America

Pages from

040005-1

Pages to

040005-7

Pages count

7

URL