Use of polyhydroxybutyrate and ethyl cellulose for coating of urea granules.
J Agric Food Chem
; 61(42): 9984-91, 2013 Oct 23.
Article
em En
| MEDLINE
| ID: mdl-24059839
Fertilizers contain essential nutrients for agricultural growth and development. However, most nitrogen fertilizers are substances with high solubility of ions and are very susceptible to leaching and volatilization. To minimize these losses, an alternative is the creation of a physical barrier around granules. One way is to coat granules with polymers. In the present work urea granules were coated with polyhydroxybutyrate and ethyl cellulose in various conditions in the presence of emulsifiers. The original granules and the final products were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy and thermogravimetry, to evaluate the surface morphology, the interaction between the granules and the coating, and the rates of mass change. The rates of urea release in distilled water were measured with a commercial enzyme kit. It is shown that those polymers are effective for coating of granules, leading to reduction of rates of urea dissolution in water.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Polímeros
/
Ureia
/
Celulose
/
Composição de Medicamentos
/
Fertilizantes
/
Hidroxibutiratos
Tipo de estudo:
Evaluation_studies
Idioma:
En
Revista:
J Agric Food Chem
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Estados Unidos