NMR study of a novel chitosan-based hydrogel

Authors
Capitani, D De Angelis, AA Crescenzi, V Masci, G Segre, AL
Citation
D. Capitani et al., NMR study of a novel chitosan-based hydrogel, CARBOHY POL, 45(3), 2001, pp. 245-252
Citations number
21
Categorie Soggetti
Agricultural Chemistry","Chemistry & Analysis","Organic Chemistry/Polymer Science
Journal title
CARBOHYDRATE POLYMERS
ISSN journal
01448617 → ACNP
Volume
45
Issue
3
Year of publication
2001
Pages
245 - 252
Database
ISI
SICI code
0144-8617(200107)45:3<245:NSOANC>2.0.ZU;2-H
Abstract
Chemical gels are obtained by reacting chitosan with 1,1,3,3-tetramethoxypr opane (TMP, a "masked" dialdehyde) and then reducing the polymeric Schiff-b ase networks with an excess of cyanoborohydride (NaBH3CN). The gels have be en characterized by means of three different C-13 magic angle spinning NMR techniques: cross-polarization, cross-polarization with a simultaneous phas e inversion and single pulse excitation. In this way we obtained spectra co ntaining sufficiently resolved information for structural analysis. A quant itative evaluation of the cross-linking degree of chitosan-TMP networks is thus attainable. (C) 2001 Elsevier Science Ltd. All rights reserved.