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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

One-pot synthesis of a chitosan-based hydrogel as a potential device for magnetic biomaterial

Texto completo
Autor(es):
Paulino, Alexandre T. [1] ; Guilherme, Marcos R. [1] ; de Almeida, Elisangela A. M. S. [2] ; Pereira, Antonio G. B. [2] ; Muniz, Edvani C. [2] ; Tambourgi, Elias B. [1]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, Fac Engn Quim, Dept Engn Sistemas Quim, Campinas, SP - Brazil
[2] Univ Estadual Maringa, GMPC, Dept Quim, Maringa, Parana - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Journal of Magnetism and Magnetic Materials; v. 321, n. 17, p. 2636-2642, SEP 2009.
Citações Web of Science: 31
Resumo

This describes the cross-linking/co-polymerization reaction of chitosan ( CS), acrylic acid (AAc), and N, N'-methylenebisacrylamide (MBA) in the presence of citrate-covered-gamma-Fe(2)O(3) nanoparticules. A gelling process was verified by means of spectroscopic methods; Fourier transform infrared (FT-IR) and solid-state (13)C-CP/MAS nuclear magnetic resonance (NMR). The corresponding signals of the gelling process, in the (13)C NMR spectra, for the magnetic hydrogel were shifted to lower values due to embedding of the citrate-covered-gamma-Fe(2)O(3) nanoparticules. The X-ray diffraction (XRD) confirmed that the crystallinity of the magnetic hydrogel exhibited a different crystalline structure to that without magnetic properties. The Mossbauer and magnetization analysis revealed that the magnetic hydrogel displays a high lattice strain, due to bonded iron atom covalence and superparamagnetism. From scanning electronic microscope (SEM) micrographs, no separation phase coexists between the magnetic nanoparticules and cross-linked hydrogel, indicating an excellent dispersion throughout the hydrogel. The swelling rate was dependent on the cross-linking degree of the hydrogel and ionic strength of the aqueous solution. (c) 2009 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 08/00285-7 - Síntese de hidrogéis magnéticos constituídos de polissacarídeos para a aplicação na remediação de águas e efluentes industriais
Beneficiário:Alexandre Tadeu Paulino
Linha de fomento: Bolsas no Brasil - Pós-Doutorado