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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F23%3APU148683" target="_blank" >RIV/00216305:26310/23:PU148683 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.aip.org/aip/acp/article/2997/1/040005/2895379/Dynamic-mechanical-analysis-of-agarose-hydrogels?searchresult=1" target="_blank" >https://pubs.aip.org/aip/acp/article/2997/1/040005/2895379/Dynamic-mechanical-analysis-of-agarose-hydrogels?searchresult=1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0159663" target="_blank" >10.1063/5.0159663</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Novel Trends in Rheology IX

ISBN

978-0-7354-4547-5

ISSN

0094-243X

e-ISSN

—

Počet stran výsledku

7

Strana od-do

„040005-1“-„040005-7“

Název nakladatele

AIP Publishing Conference Proceedings

Místo vydání

Melville, New York, 2023

Místo konání akce

Zlín

Datum konání akce

26. 7. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

001007482800012