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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Controlled release from hydroxyapatite nanoparticles incorporated into biodegradable, soluble host matrixes

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Author(s):
Giroto, A. S. [1, 2] ; Fidelis, S. C. [1, 2] ; Ribeiro, C. [2]
Total Authors: 3
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
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