Publication detail

How Humic Acids Affect the Rheological and Transport Properties of Hydrogels

KLUČÁKOVÁ, M. SMILEK, J. SEDLÁČEK, P.

Original Title

How Humic Acids Affect the Rheological and Transport Properties of Hydrogels

Type

journal article in Web of Science

Language

English

Original Abstract

Humic 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.

Keywords

humic acid; hydrogel; secondary structure; rheology; diffusion

Authors

KLUČÁKOVÁ, M.; SMILEK, J.; SEDLÁČEK, P.

Released

19. 4. 2019

Publisher

MDPI

Location

Basel

ISBN

1420-3049

Periodical

MOLECULES

Year of study

24

Number

8

State

Swiss Confederation

Pages from

1545

Pages to

1557

Pages count

13

URL

https://www.mdpi.com/1420-3049/24/8/1545

Full text in the Digital Library

http://hdl.handle.net/11012/179266

BibTex

@article{BUT156651,
  author="Martina {Klučáková} and Jiří {Smilek} and Petr {Sedláček}",
  title="How Humic Acids Affect the Rheological and Transport Properties of Hydrogels",
  journal="MOLECULES",
  year="2019",
  volume="24",
  number="8",
  pages="1545--1557",
  doi="10.3390/molecules24081545",
  issn="1420-3049",
  url="https://www.mdpi.com/1420-3049/24/8/1545"
}