Dynamic and equilibrium swelling of biodegradable starch-based superabsorbent polymers

• Type: Article in International Scientific Journal
• Date: 2008

Authors

Maria do Pilar Gonçalves (Author) FEUP; J.M.P.Q. Delgado (Author) FEUP; R. O. Nasser (Author) FEUP; M. Vázquez da Silva (Author) FEUP; Cristina Andrade (Author) Other

Journal

Title: Defect and Diffusion Forum

Vol. 273-276

Pages: 126-131

ISSN: 1012-0386

Publisher: Trans Tech Publications Ltd

Indexing

ISI Proceedings

ISI Web of Science

Scopus

COMPENDEX

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

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

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6