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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
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
https://pubs.aip.org/aip/acp/article/2997/1/040005/2895379/Dynamic-mechanical-analysis-of-agarose-hydrogels?searchresult=1