In situ forming of PEG-NH2/dialdehyde starch Schiff-base hydrogels and their application in slow-release urea
Copyright © 2023 Elsevier B.V. All rights reserved..
In this study, a biodegradable Schiff-base hydrogel urea, possessing substantial water retention and certain slow-release ability was designed and synthesized. Firstly, dialdehyde starch (DAS) and amine-terminated polyethylene glycol (PEG-(NH2)2) were synthesized using potato starch and polyethylene glycol. Then, a novel Schiff-base hydrogel (SH) was prepared through the in-situ reaction between the aldehyde group of DAS and the amino group of PEG-(NH2)2. Three SH based slow-release urea, designated as SHU1, SHU2, and SHU3 and distinguished by varying urea content, were obtained using SH as the substrate. Several characterizations and tests were conducted to determine the structure, thermal properties, morphology, swelling properties, sustainable use, water retention, and biodegradation properties of SH. Additionally, the slow-release behavior of SHU was studied. SEM results revealed that SH possessed a porous three-dimensional network structure, with a maximum water absorption capacity of 4440 % ± 6.23 %. Compared to pure urea, SHU exhibited better slow-release performance after 30 days of release in soil, with SHU1 having a residual nitrogen content of specifically 36.01 ± 0.57 % of the initial nitrogen content. A pot experiment with pakchoi substantiated the water retention and plant growth promotion properties of SHU. This study demonstrated a straightforward method for the preparation of starch-based Schiff-base hydrogels as fertilizer carriers.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:256 |
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| Enthalten in: |
International journal of biological macromolecules - 256(2024), Pt 1 vom: 21. Jan., Seite 128355 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Zhang, Wenli [VerfasserIn] |
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| Links: |
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| Themen: |
059QF0KO0R |
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| Anmerkungen: |
Date Completed 18.01.2024 Date Revised 18.01.2024 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.ijbiomac.2023.128355 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM364870494 |
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| 520 | |a Copyright © 2023 Elsevier B.V. All rights reserved. | ||
| 520 | |a In this study, a biodegradable Schiff-base hydrogel urea, possessing substantial water retention and certain slow-release ability was designed and synthesized. Firstly, dialdehyde starch (DAS) and amine-terminated polyethylene glycol (PEG-(NH2)2) were synthesized using potato starch and polyethylene glycol. Then, a novel Schiff-base hydrogel (SH) was prepared through the in-situ reaction between the aldehyde group of DAS and the amino group of PEG-(NH2)2. Three SH based slow-release urea, designated as SHU1, SHU2, and SHU3 and distinguished by varying urea content, were obtained using SH as the substrate. Several characterizations and tests were conducted to determine the structure, thermal properties, morphology, swelling properties, sustainable use, water retention, and biodegradation properties of SH. Additionally, the slow-release behavior of SHU was studied. SEM results revealed that SH possessed a porous three-dimensional network structure, with a maximum water absorption capacity of 4440 % ± 6.23 %. Compared to pure urea, SHU exhibited better slow-release performance after 30 days of release in soil, with SHU1 having a residual nitrogen content of specifically 36.01 ± 0.57 % of the initial nitrogen content. A pot experiment with pakchoi substantiated the water retention and plant growth promotion properties of SHU. This study demonstrated a straightforward method for the preparation of starch-based Schiff-base hydrogels as fertilizer carriers | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Dialdehyde starch | |
| 650 | 4 | |a Schiff-base hydrogel | |
| 650 | 4 | |a Slow-release urea | |
| 650 | 7 | |a Hydrogels |2 NLM | |
| 650 | 7 | |a dialdehyde starch |2 NLM | |
| 650 | 7 | |a 9047-50-1 |2 NLM | |
| 650 | 7 | |a Urea |2 NLM | |
| 650 | 7 | |a 8W8T17847W |2 NLM | |
| 650 | 7 | |a Starch |2 NLM | |
| 650 | 7 | |a 9005-25-8 |2 NLM | |
| 650 | 7 | |a Polyethylene Glycols |2 NLM | |
| 650 | 7 | |a 3WJQ0SDW1A |2 NLM | |
| 650 | 7 | |a Schiff Bases |2 NLM | |
| 650 | 7 | |a Water |2 NLM | |
| 650 | 7 | |a 059QF0KO0R |2 NLM | |
| 650 | 7 | |a Nitrogen |2 NLM | |
| 650 | 7 | |a N762921K75 |2 NLM | |
| 700 | 1 | |a Sun, Xiang Liao |e verfasserin |4 aut | |
| 700 | 1 | |a Yang, Qian |e verfasserin |4 aut | |
| 700 | 1 | |a Guo, Yuanyuan |e verfasserin |4 aut | |
| 700 | 1 | |a Cui, Yanjun |e verfasserin |4 aut | |
| 700 | 1 | |a Xiang, Yongsheng |e verfasserin |4 aut | |
| 700 | 1 | |a Hu, Bing |e verfasserin |4 aut | |
| 700 | 1 | |a Wei, Jia |e verfasserin |4 aut | |
| 700 | 1 | |a Tu, Peng |e verfasserin |4 aut | |
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