Data/hora: 15/05/2024 01:17:53

Biblioteca(s): | Embrapa Pecuária Sudeste.
Data corrente: | 26/07/2012
Data da última atualização: | 17/02/2023
Autoria: | PEREIRA, E. I.; MINUSSI, F. B.; CRUZ, C. C. T. da; BERNARDI, A. C. de C.
Afiliação: | ELAINE I. PEREIRA, UFSCAR/SÃO CARLOS, SP; FERNANDO B. MINUSSI, UFSCAR/SÃO CARLOS, SP; CAMILA C. T. DA CRUZ, UFSCAR/SÃO CARLOS, SP; ALBERTO CARLOS DE CAMPOS BERNARDI, CPPSE.
Título: | Urea-montmorillonite-extruded nanocomposites: a novel slow-release material.
Ano de publicação: | 2012
Fonte/Imprenta: | Journal of Agricultural and Food Chemistry, v. 60, p. 5267-5272, 2012.
DOI: | 10.1021/jf3001229
Idioma: | Inglês
Conteúdo: | The present study describes the preparation and characterization of a novel urea slow-release nanocomposite, based on urea intercalation into montmorillonite clay by an extrusion process at room temperature. Nanocomposites with urea contents ranging from 50 to 80 wt % were successfully produced and characterized. Analyses by XRD, DTA, and SEM-EDX con?rmed the e?ectiveness of this simple process to exfoliate the clay lamellae into the urea matrix, forming a product that can be classi?ed as a nanocomposite, due to the exfoliation degree attained. Diametral compression tests showed that the samples were very deformable, and the release rate of active components in water showed that the nanocomposite showed a slow release behavior for urea dissolution, even in low montmorillonite amounts (20% in weight).
Palavras-Chave: | Fertilizer; Intercalation.
Thesaurus Nal: | extrusion; montmorillonite; urea.
Categoria do assunto: | --
Registro original: | Embrapa Pecuária Sudeste (CPPSE)
Exemplares: | CPPSE - (21223-1) - UPC - AP - DD - PROCI-2012.00079 - PER - 2012.00079 - DIS