FTIR spectra study on the film of polyurethane coated urea controlled-release fertilizer
The polyurethane films were prepared to wrap the urea in order to achieve a desirable release rate by mixing isocyanate, polyols and wax. The effect of wax, urea and isocyanate on the structure and properties of the films was investigated by FTIR. The structural changes were monitored as the polyurethane films together with the wrapped urea were immersed into ammonia water for 28 days, which is used to model soil conditions. The FTIR results showed that the width and intensity of the NH-free band increased remarkably with time, and all kinds of carbonly bands shifted to high wavenumber and their intensity increased obviously. The results suggest that the structure of the polyurethane films was destroyed more heavily in soil than in water, and this explains the relatively fast release rate of urea in soil. It was observed that the increase in the chemical crosslinking density in the polyurethane films can effectively decrease the release rate of the urea nitrogen in soil.
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
2011 |
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| Erschienen: |
2011 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:31 |
|---|---|
| Enthalten in: |
Guang pu xue yu guang pu fen xi = Guang pu - 31(2011), 3 vom: 14. März, Seite 630-4 |
| Sprache: |
Chinesisch |
|---|
| Beteiligte Personen: |
Wu, Shu [VerfasserIn] |
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| Themen: |
059QF0KO0R |
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| Anmerkungen: |
Date Completed 23.01.2014 Date Revised 16.11.2017 published: Print Citation Status MEDLINE |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM208454357 |
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| LEADER | 01000naa a22002652 4500 | ||
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| 100 | 1 | |a Wu, Shu |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a FTIR spectra study on the film of polyurethane coated urea controlled-release fertilizer |
| 264 | 1 | |c 2011 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ohne Hilfsmittel zu benutzen |b n |2 rdamedia | ||
| 338 | |a Band |b nc |2 rdacarrier | ||
| 500 | |a Date Completed 23.01.2014 | ||
| 500 | |a Date Revised 16.11.2017 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a The polyurethane films were prepared to wrap the urea in order to achieve a desirable release rate by mixing isocyanate, polyols and wax. The effect of wax, urea and isocyanate on the structure and properties of the films was investigated by FTIR. The structural changes were monitored as the polyurethane films together with the wrapped urea were immersed into ammonia water for 28 days, which is used to model soil conditions. The FTIR results showed that the width and intensity of the NH-free band increased remarkably with time, and all kinds of carbonly bands shifted to high wavenumber and their intensity increased obviously. The results suggest that the structure of the polyurethane films was destroyed more heavily in soil than in water, and this explains the relatively fast release rate of urea in soil. It was observed that the increase in the chemical crosslinking density in the polyurethane films can effectively decrease the release rate of the urea nitrogen in soil | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 7 | |a Fertilizers |2 NLM | |
| 650 | 7 | |a Polyurethanes |2 NLM | |
| 650 | 7 | |a Soil |2 NLM | |
| 650 | 7 | |a Water |2 NLM | |
| 650 | 7 | |a 059QF0KO0R |2 NLM | |
| 650 | 7 | |a Urea |2 NLM | |
| 650 | 7 | |a 8W8T17847W |2 NLM | |
| 700 | 1 | |a Li, Qing-shan |e verfasserin |4 aut | |
| 700 | 1 | |a Ru, Tie-jun |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Li-min |e verfasserin |4 aut | |
| 700 | 1 | |a Xing, Guang-zhong |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Jin-ming |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Guang pu xue yu guang pu fen xi = Guang pu |d 1997 |g 31(2011), 3 vom: 14. März, Seite 630-4 |w (DE-627)NLM09368360X |x 1000-0593 |7 nnns |
| 773 | 1 | 8 | |g volume:31 |g year:2011 |g number:3 |g day:14 |g month:03 |g pages:630-4 |
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