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

Autor(es)

Giroto, A. S. ^{[1, 2]} ; Fidelis, S. C. ^{[1, 2]} ; Ribeiro, C. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil

^[2] Embrapa Instrumentat, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: RSC ADVANCES; v. 5, n. 126, p. 104179-104186, 2015.
• Citações Web of Science: 9

Resumo

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)

• Processo FAPESP: 13/11821-5 - Estudo da Solubilização de Fosfatos Nanométricos dispersos em Matrizes de diferentes solubilidades
• Beneficiário: Amanda Soares Giroto
• Modalidade de apoio: Bolsas no Brasil - Doutorado