Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/57411
Type: Artigo de periódico
Title: Crosslinking of chitosan membranes using glutaraldehyde: Effect on ion permeability and water absorption
Author: Beppu, MM
Vieira, RS
Aimoli, CG
Santana, CC
Abstract: Many mass-transfer applications have used chitosan membranes in separation processes (e.g. filtration and adsorption). Chitosan can be crosslinked easily by dialdehydes, such as glutaraldehyde, and this process is able to change drastically some macro and micro properties: water absorption, ion permeability, chemical and mechanical properties. Dense membranes were produced by casting and drying of chitosan solution. Potentiometric titration, infrared spectroscopy (FTIR-ATR) and thermal gravimetric analyses (TGA) were used for chemical characterization, and to identify differences between pristine and crosslinked chitosan membranes. Diffusion experiments confirm some subtle changes in permeability of ions. All results indicate that chemical modification with glutaraldehyde turns chitosan more hydrophobic. (c) 2007 Elsevier B.V. All rights reserved.
Subject: chitosan
membranes
permeability
chitin
glutaraldehyde
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.memsci.2007.06.015
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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