How Humic Acids Affect the Rheological and Transport Properties of Hydrogels

dc.contributor.authorKlučáková, Martinacs
dc.contributor.authorSmilek, Jiřícs
dc.contributor.authorSedláček, Petrcs
dc.coverage.issue8cs
dc.coverage.volume24cs
dc.date.issued2019-04-19cs
dc.description.abstractHumic acids are often regarded as substances with a supramolecular structure which plays an important role in Nature. Their addition into hydrogels can affect their behavior and functioning in different applications. This work is focused on the properties of widely-used hydrogel based on agarose after addition of humic acids–the protonated H-form of humic acids and humic acids with methylated carboxylic groups. Hydrogels enriched by humic acids were studied in terms of their viscoelastic and transport properties. Rotational rheometry and methods employing diffusion cells were used in order to describe the influence of humic acids on the properties and behavior of hydrogels. From the point of view of rheology the addition of humic acids mainly affected the loss modulus corresponding to the relaxation of hydrogel connected with its flow. In the case of diffusion experiments, the transport of dyes (methylene blue and rhodamine) and metal ions (copper and nickel) through the hydrogel was affected by interactions between humic acids and the diffusion probes. The time lag in the hydrogel enriched by humic acids was prolonged for copper, methylene blue and rhodamine. In contrast, the presence of humic acids in hydrogel slightly increased the mobility of nickel. The strongest influence of the methylation of humic acids on diffusion was observed for methylene blue.en
dc.description.abstractHuminové kyseliny jsou považovány za látky s tzv. supramolekulární strukturou, jež je základem jejich unikátních vlastností a fungování v přírodě. Naše studie potvrdila, že již malý přídavek těchto látek do agarozových hydrogelů má vliv na jejich vlastnosti a chování. Z reologických testů vylynulo, že přídavek huminových kyselin i jejich methylenovaných vzorků snižuje odolnost hydrogelů vůči mechanickému namáhání. Zároveň ovlivňuje transport difuzních sond skrz hydrogely v závislosti na míře afinity sondy k humiovým látkácm. Pro transportní experimenty byly použity měďnaté a nikelnaté ionty, dále barviva methylenová modř a rhodamin.cs
dc.formattextcs
dc.format.extent1545-1557cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationMOLECULES. 2019, vol. 24, issue 8, p. 1545-1557.en
dc.identifier.doi10.3390/molecules24081545cs
dc.identifier.issn1420-3049cs
dc.identifier.orcid0000-0003-4969-6988cs
dc.identifier.orcid0000-0002-6553-1764cs
dc.identifier.orcid0000-0002-6211-9643cs
dc.identifier.other156651cs
dc.identifier.scopus55844628200cs
dc.identifier.scopus25621752900cs
dc.identifier.urihttp://hdl.handle.net/11012/179266
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofMOLECULEScs
dc.relation.urihttps://www.mdpi.com/1420-3049/24/8/1545cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1420-3049/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjecthumic aciden
dc.subjecthydrogelen
dc.subjectsecondary structureen
dc.subjectrheologyen
dc.subjectdiffusionen
dc.subjecthuminové kyseliny
dc.subjecthydrogel
dc.subjectsekundární struktura
dc.subjectreologie
dc.subjectdifúze
dc.titleHow Humic Acids Affect the Rheological and Transport Properties of Hydrogelsen
dc.title.alternativeJak huminové kyseliny ovlivňují reologické a transportní vlastnosti hydrogelůcs
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-156651en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:37:53en
sync.item.modts2025.01.17 15:28:25en
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. Ústav fyzikální a spotřební chemiecs
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. Centrum materiálového výzkumucs
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