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Crosslinking of chitosan membranes using glutaraldehyde: Effect on ion permeability and water absorption

✍ Scribed by M.M. Beppu; R.S. Vieira; C.G. Aimoli; C.C. Santana

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
409 KB
Volume
301
Category
Article
ISSN
0376-7388

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✦ Synopsis

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.

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