Please use this identifier to cite or link to this item:
Title: A novel amine-shielded surface cross-linking of chitosan hydrogel beads for enhanced metal adsorption performance
Authors: Li, N. 
Bai, R. 
Issue Date: 17-Aug-2005
Citation: Li, N., Bai, R. (2005-08-17). A novel amine-shielded surface cross-linking of chitosan hydrogel beads for enhanced metal adsorption performance. Industrial and Engineering Chemistry Research 44 (17) : 6692-6700. ScholarBank@NUS Repository.
Abstract: A new amine-shielded cross-linking method of the chitosan hydrogel beads (CHBs) was investigated to improve the metal adsorption performance of the cross-linked beads. The CHBs were reacted with formaldehyde before the beads were cross-linked with EGDE, and, finally, the amine groups of cross-linked CHBs were released by HCl treatment. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy clearly showed that most of the amine groups in chitosan were converted to the -N=CH 2 groups after the formaldehyde treatment and they were not involved in the cross-linking reaction with EGDE, and the HCl treatment after the cross-linking reaction effectively released these shielded nitrogen atoms into the form of the primary amine again. Copper ion adsorption experiments confirmed that the CHBs cross-linked with the new method had significantly greater adsorption capacities than the beads cross-linked directly with EGDE. Mechanism study revealed that the increased adsorption performance was attributed to the large number of primary amine groups available on the surfaces of the cross-linked beads from the new cross-linking method. © 2005 American Chemical Society.
Source Title: Industrial and Engineering Chemistry Research
ISSN: 08885885
DOI: 10.1021/ie050145k
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Mar 22, 2023


checked on Mar 22, 2023

Page view(s)

checked on Mar 16, 2023

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.