Structural parameters of polyacrylamide hydrogels obtained by the Equilibrium Swelling Theory

Autor(es)

Lira, Luiz M. ^[1] ; Martins, Karina A. ^[1] ; Cordoba de Torresi, Susana I. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim, BR-05513970 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: EUROPEAN POLYMER JOURNAL; v. 45, n. 4, p. 1232-1238, APR 2009.
• Citações Web of Science: 29

Resumo

In this paper, the synthesis and structural characterization of a series of polyacrylamide hydrogels with different degrees of reticulation are reported. Although the Equilibrium Swelling Theory was recognized as a simple and reliable tool for the determination of structural hydrogels network parameters like equilibrium degree of swelling, cross-link ratio and mesh size, this is the first application of this methodology for polyacrylamide hydrogels. By changing the total monomer content in the synthesis solution (%T) from 5 to 30%, at a fixed value of cross-linker content in the total monomer amount (%C) of 5%, the final parameter obtained, the mesh size, can be tuned from 2 to 0.3 nm. It was also possible to change the mesh size (0.19-0.35) by varying %C from 5 to 12% (at %T = 20%). Scanning Electron Microscopy images for the most different formulations are shown and corroborate data obtained from the theory. (c) 2008 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 03/00809-2 - Polímeros condutores e compósitos de polímeros condutores e hidrogéis como matrizes modelo para a liberação controlada de drogas
• Beneficiário: Luiz Marcos de Lira Faria
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 03/10015-3 - Arranjos organizados de macromoléculas e nanoestruturas para o desenvolvimento de sensores e microbaterias
• Beneficiário: Roberto Manuel Torresi
• Modalidade de apoio: Auxílio à Pesquisa - Programa PRONEX - Temático