| Full text | |
| Author(s): |
Total Authors: 3
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| Affiliation: | [1] Univ Fed Sao Carlos, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil
[2] Embrapa Instrumentat, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 2
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| Document type: | Journal article |
| Source: | RSC ADVANCES; v. 5, n. 126, p. 104179-104186, 2015. |
| Web of Science Citations: | 9 |
| Abstract | |
We report in this paper a strategy to prepare nanocomposite fertilizers based on the dispersion of hydroxyapatite (Hap) into urea and thermoplastic starch at nanoscale, where Hap was assumed as a model for poorly soluble phosphate phases, such as phosphate rocks. Our experiments revealed the role of particle agglomeration on the effective phosphate release, showing that Hap dispersion within two water-soluble matrices (urea and thermoplastic starch/urea) is an effective strategy to increase Hap solubility. Aspects such as matrix solubility, morphology and Hap loading were detailed studied. Also, these structures showed an interesting slow-release of urea, i.e., the materials were at the same time a system for faster release of poorly soluble phosphate phases and slow release of very soluble nitrogen source (urea). Our results support the development of a new class of smart fertilizers, with release properties tailored by nanostructure. (AU) | |
| FAPESP's process: | 13/11821-5 - Study of Nanosize Phosphate Solubilization Dispersed in Matrices of Different Solubilities |
| Grantee: | Amanda Soares Giroto |
| Support Opportunities: | Scholarships in Brazil - Doctorate |