Eco-friendly and biodegradable dimethylacrylamide/starch hydrogels for controlled release of urea and its water retention
In this study, we focused on the synthesis of polymeric hydrogels that will support the sorption and controlled release of urea, which is a rich nitrogen source, from aqueous solutions and their usability in agricultural applications. N, N-Dimethylacrylamide (DMAAm) and Starch (St) were selected as...
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Kyrgyz Turkish Manas University
2022-12-01
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| Series: | MANAS: Journal of Engineering |
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| Online Access: | https://dergipark.org.tr/en/download/article-file/2731662 |
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| author | Duygu Alpaslan Tuba Erşen Dudu |
| author_facet | Duygu Alpaslan Tuba Erşen Dudu |
| author_sort | Duygu Alpaslan |
| collection | DOAJ |
| description | In this study, we focused on the synthesis of polymeric hydrogels that will support the sorption and controlled release of urea, which is a rich nitrogen source, from aqueous solutions and their usability in agricultural applications. N, N-Dimethylacrylamide (DMAAm) and Starch (St) were selected as monomers, and their superior properties, such as chemical stability, high sorption properties, biocompatibility, and the presence of modifiable groups, were utilized. A redox polymerization technique was used to create a poly(DMAAm-co-St)-based hydrogel that was then modified with acidic and basic agents to improve the properties of starch. The synthesized acid- and base-modified hydrogels were named DSt, DSt1, and DSt2, respectively. Swelling analyses were performed to examine the structural and morphological properties of DSt, DSt1, and DSt2 hydrogels, and Fourier-Transform Infrared Spectroscopy (FT-IR) and Thermogravimetric Analyzers (TGA) were used. Intense cross-linking, porosity, and the presence of hydrophilic groups were successfully detected by instrumental analysis and swelling results. The successful results of urea sorption by DSt, DSt1, and DSt2 hydrogels show that they can both minimize the harmful effects of urea in the environment and contain the nitrogen necessary for plants. At the same time, urea sorption behaviors were evaluated in terms of sorption isotherms and thermodynamic properties, and it was observed that urea sorption conformed to the Langmuir isotherm. The urea release results showed that DSt, DSt1, and DSt2 hydrogels exhibited different release properties in different pH solutions, and these results reached 94% at pH 6–8, 100% at pH 6, and 100% at pH 8–10, respectively. As a result of the gradual decrease in the water resources on the earth, the increase in the use of fertilizers in agricultural production, and the insufficient use of fertilizers, our study draws attention to the development and support of materials that absorb/store water, and forms of controlled release fertilizers and provides potential ease of application |
| format | Article |
| id | doaj-art-9d6ca9f7d1e0425aa6b1d026b1b6be37 |
| institution | Kabale University |
| issn | 1694-7398 |
| language | English |
| publishDate | 2022-12-01 |
| publisher | Kyrgyz Turkish Manas University |
| record_format | Article |
| series | MANAS: Journal of Engineering |
| spelling | doaj-art-9d6ca9f7d1e0425aa6b1d026b1b6be372024-12-05T03:36:01ZengKyrgyz Turkish Manas UniversityMANAS: Journal of Engineering1694-73982022-12-0110211612810.51354/mjen.11947561437Eco-friendly and biodegradable dimethylacrylamide/starch hydrogels for controlled release of urea and its water retentionDuygu Alpaslan0https://orcid.org/0000-0002-6007-3397Tuba Erşen Dudu1https://orcid.org/0000-0001-5564-2834VAN YÜZÜNCÜ YIL ÜNİVERSİTESİVan Yüzüncü Yıl ÜniversitesiIn this study, we focused on the synthesis of polymeric hydrogels that will support the sorption and controlled release of urea, which is a rich nitrogen source, from aqueous solutions and their usability in agricultural applications. N, N-Dimethylacrylamide (DMAAm) and Starch (St) were selected as monomers, and their superior properties, such as chemical stability, high sorption properties, biocompatibility, and the presence of modifiable groups, were utilized. A redox polymerization technique was used to create a poly(DMAAm-co-St)-based hydrogel that was then modified with acidic and basic agents to improve the properties of starch. The synthesized acid- and base-modified hydrogels were named DSt, DSt1, and DSt2, respectively. Swelling analyses were performed to examine the structural and morphological properties of DSt, DSt1, and DSt2 hydrogels, and Fourier-Transform Infrared Spectroscopy (FT-IR) and Thermogravimetric Analyzers (TGA) were used. Intense cross-linking, porosity, and the presence of hydrophilic groups were successfully detected by instrumental analysis and swelling results. The successful results of urea sorption by DSt, DSt1, and DSt2 hydrogels show that they can both minimize the harmful effects of urea in the environment and contain the nitrogen necessary for plants. At the same time, urea sorption behaviors were evaluated in terms of sorption isotherms and thermodynamic properties, and it was observed that urea sorption conformed to the Langmuir isotherm. The urea release results showed that DSt, DSt1, and DSt2 hydrogels exhibited different release properties in different pH solutions, and these results reached 94% at pH 6–8, 100% at pH 6, and 100% at pH 8–10, respectively. As a result of the gradual decrease in the water resources on the earth, the increase in the use of fertilizers in agricultural production, and the insufficient use of fertilizers, our study draws attention to the development and support of materials that absorb/store water, and forms of controlled release fertilizers and provides potential ease of applicationhttps://dergipark.org.tr/en/download/article-file/2731662controlled releasehydrogelnitrogen lossstarchwater retention |
| spellingShingle | Duygu Alpaslan Tuba Erşen Dudu Eco-friendly and biodegradable dimethylacrylamide/starch hydrogels for controlled release of urea and its water retention MANAS: Journal of Engineering controlled release hydrogel nitrogen loss starch water retention |
| title | Eco-friendly and biodegradable dimethylacrylamide/starch hydrogels for controlled release of urea and its water retention |
| title_full | Eco-friendly and biodegradable dimethylacrylamide/starch hydrogels for controlled release of urea and its water retention |
| title_fullStr | Eco-friendly and biodegradable dimethylacrylamide/starch hydrogels for controlled release of urea and its water retention |
| title_full_unstemmed | Eco-friendly and biodegradable dimethylacrylamide/starch hydrogels for controlled release of urea and its water retention |
| title_short | Eco-friendly and biodegradable dimethylacrylamide/starch hydrogels for controlled release of urea and its water retention |
| title_sort | eco friendly and biodegradable dimethylacrylamide starch hydrogels for controlled release of urea and its water retention |
| topic | controlled release hydrogel nitrogen loss starch water retention |
| url | https://dergipark.org.tr/en/download/article-file/2731662 |
| work_keys_str_mv | AT duygualpaslan ecofriendlyandbiodegradabledimethylacrylamidestarchhydrogelsforcontrolledreleaseofureaanditswaterretention AT tubaersendudu ecofriendlyandbiodegradabledimethylacrylamidestarchhydrogelsforcontrolledreleaseofureaanditswaterretention |