Dynamic and equilibrium swelling of biodegradable starch-based superabsorbent polymers

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2008

Autores

Nasser, RO (Autor) Outra; M. Vázquez da Silva (Autor) FEUP; J.M.P.Q. Delgado (Autor) FEUP; Maria do Pilar Gonçalves (Autor) FEUP; Andrade, CT (Autor) Outra

Ata de Conferência Internacional

Título: DIFFUSION IN SOLIDS AND LIQUIDS III

Páginas: 126-131

3rd International Conference on Diffusion in Solids and Liquids

Algarve, PORTUGAL, JUL 04-06, 2007

Indexação

ISI Web of Knowledge - 2 Citações

Scopus - 2 Citações

Outras Informações

ID Authenticus: P-005-5YS

DOI: 10.4028/www.scientific.net/ddf.273-276.126

Abstract (EN): A series of biodegradable superabsorbent polymers (SAP's) based on starch grafted with acrylic acid (AA) and crosslinked with N,N'-methylenebisacrylamide (MBIS) were obtained. The parameters that define SAP's properties, such as starch type, amount of initiator, acrylic acid and crosslinker concentrations, and degree of neutralization were varied. The dynamic swelling was interpreted in terms of both a simple power of time equation and a more detailed model based on a coupled diffusion-relaxation mechanism. The diffusivity coefficients calculated from diffusion-relaxation model were compared with the microimages obtained by optical microscopic.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6