Publication detail

Functional Hydrogels for Agricultural Application

KRATOCHVÍLOVÁ, R. KRÁČALÍK, M. SMILKOVÁ, M. SEDLÁČEK, P. PEKAŘ, M. BRADT, E. SMILEK, J. ZÁVODSKÁ, P. KLUČÁKOVÁ, M.

Original Title

Functional Hydrogels for Agricultural Application

Type

journal article in Web of Science

Language

English

Original Abstract

Ten different hydrogels were prepared and analyzed from the point of view of their use in soil. FT-IR spectra, morphology, swelling ability, and rheological properties were determined for their characterization and appraisal of their stability. The aim was to characterize prepared materials containing different amounts of NPK as mineral fertilizer, lignohumate as a source of organic carbon, and its combination. This study of stability was focused on utility properties in their application in soil—repeated drying/re-swelling cycles and possible freezing in winter. Lignohumate supported the water absorbency, while the addition of NPK caused a negative effect. Pore sizes decreased with NPK addition. Lignohumate incorporated into polymers resulted in a much miscellaneous structure, rich in different pores and voids of with a wide range of sizes. NPK fertilizer supported the elastic character of prepared materials, while the addition of lignohumate shifted their rheological behavior to more liquid. Both dynamic moduli decreased in time. The most stable samples appeared to contain only one fertilizer constituent (NPK or lignohumate). Repeated re-swelling resulted in an increase in elastic character, which was connected with the gradual release of fertilizers. A similar effect was observed with samples that were frozen and defrosted, except samples containing a higher amount of NPK without lignohumate. A positive effect of acrylamide on superabsorbent properties was not confirmed.

Keywords

Deset různých vzorků hydrogelů na bázi polyakrylové kyseliny s přídavkem akrylamidu, NPK a lignohumátu v různých kombinacích bylo připraveno a analyzováno. FT-IR, SEM, botnací experimenty a relogie byly metodami použitými pro charakterizaci připravených vzorků. Viskoelastické vlastnosti byly dále studovány z hlediska stability vzorků v čase, při opakovaném botnání a přemražení.

Authors

KRATOCHVÍLOVÁ, R.; KRÁČALÍK, M.; SMILKOVÁ, M.; SEDLÁČEK, P.; PEKAŘ, M.; BRADT, E.; SMILEK, J.; ZÁVODSKÁ, P.; KLUČÁKOVÁ, M.

Released

22. 7. 2023

Publisher

MDPI

ISBN

2310-2861

Periodical

Gels

Year of study

9

Number

7

State

Swiss Confederation

Pages from

1

Pages to

17

Pages count

17

URL

https://www.mdpi.com/2310-2861/9/7/590

Full text in the Digital Library

http://hdl.handle.net/11012/244993

BibTex

@article{BUT184167,
  author="Romana {Kratochvílová} and Milan {Kráčalík} and Marcela {Smilková} and Petr {Sedláček} and Miloslav {Pekař} and Elke {Bradt} and Jiří {Smilek} and Petra {Závodská} and Martina {Klučáková}",
  title="Functional Hydrogels for Agricultural Application",
  journal="Gels",
  year="2023",
  volume="9",
  number="7",
  pages="17",
  doi="10.3390/gels9070590",
  issn="2310-2861",
  url="https://www.mdpi.com/2310-2861/9/7/590"
}