Functional Hydrogels for Agricultural Application
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 containi...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Gels |
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| Online Access: | https://www.mdpi.com/2310-2861/9/7/590 |
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| author | Romana Kratochvílová Milan Kráčalík Marcela Smilková Petr Sedláček Miloslav Pekař Elke Bradt Jiří Smilek Petra Závodská Martina Klučáková |
| author_facet | Romana Kratochvílová Milan Kráčalík Marcela Smilková Petr Sedláček Miloslav Pekař Elke Bradt Jiří Smilek Petra Závodská Martina Klučáková |
| author_sort | Romana Kratochvílová |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-11T01:02:29Z |
| format | Article |
| id | doaj.art-322b4ad23f0041768997e8c694fafb69 |
| institution | Directory Open Access Journal |
| issn | 2310-2861 |
| language | English |
| last_indexed | 2024-03-11T01:02:29Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Gels |
| spelling | doaj.art-322b4ad23f0041768997e8c694fafb692023-11-18T19:28:24ZengMDPI AGGels2310-28612023-07-019759010.3390/gels9070590Functional Hydrogels for Agricultural ApplicationRomana Kratochvílová0Milan Kráčalík1Marcela Smilková2Petr Sedláček3Miloslav Pekař4Elke Bradt5Jiří Smilek6Petra Závodská7Martina Klučáková8Faculty of Chemistry, Brno University of Technology, Purkyňova 464/118, CZ-61200 Brno, Czech RepublicInstitute of Polymer Science, Johannes Kepler University, Altenberger Strasse 69, 4040 Linz, AustriaFaculty of Chemistry, Brno University of Technology, Purkyňova 464/118, CZ-61200 Brno, Czech RepublicFaculty of Chemistry, Brno University of Technology, Purkyňova 464/118, CZ-61200 Brno, Czech RepublicFaculty of Chemistry, Brno University of Technology, Purkyňova 464/118, CZ-61200 Brno, Czech RepublicInstitute of Polymer Science, Johannes Kepler University, Altenberger Strasse 69, 4040 Linz, AustriaFaculty of Chemistry, Brno University of Technology, Purkyňova 464/118, CZ-61200 Brno, Czech RepublicFaculty of Chemistry, Brno University of Technology, Purkyňova 464/118, CZ-61200 Brno, Czech RepublicFaculty of Chemistry, Brno University of Technology, Purkyňova 464/118, CZ-61200 Brno, Czech RepublicTen 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.https://www.mdpi.com/2310-2861/9/7/590superabsorbentswellingfertilizerlignohumaterheologystability |
| spellingShingle | Romana Kratochvílová Milan Kráčalík Marcela Smilková Petr Sedláček Miloslav Pekař Elke Bradt Jiří Smilek Petra Závodská Martina Klučáková Functional Hydrogels for Agricultural Application Gels superabsorbent swelling fertilizer lignohumate rheology stability |
| title | Functional Hydrogels for Agricultural Application |
| title_full | Functional Hydrogels for Agricultural Application |
| title_fullStr | Functional Hydrogels for Agricultural Application |
| title_full_unstemmed | Functional Hydrogels for Agricultural Application |
| title_short | Functional Hydrogels for Agricultural Application |
| title_sort | functional hydrogels for agricultural application |
| topic | superabsorbent swelling fertilizer lignohumate rheology stability |
| url | https://www.mdpi.com/2310-2861/9/7/590 |
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