Synthesis,characterization, and metal ions adsorption properties of chitosan–calixarenes (I) |
| |
Authors: | Hai‐Bing Li Yuan‐Yin Chen Shi‐Lan Liu |
| |
Abstract: | Calixarene‐modified chitosans (CTS–CA‐I and CTS–CA‐II) were first synthesized by the reaction of chitosan (CTS‐NH2) with 1,3‐bis‐chloroethoxyethoxy‐2,4‐dihydroxy‐p‐tert‐butylcalix4]arene (CA‐I) or its benzoyl derivative (CA‐II). Their structures were characterized by infrared and X‐ray diffraction spectroscopy and scanning electron microscopy (SEM). The adsorption of Ni2+, Cd2+, Cu2+, Pd2+, Ag+, and Hg2+ by CTS–CA‐I and CTS–CA‐II was studied and the thermodynamic parameter of two calixarene‐modified chitosans toward Hg2+ was deduced. The adsorption properties of CTS–CA‐I and CTS–CA‐II were greatly varied compared with that CTS‐NH2, especially with the adsorption capacity toward Ag+ and Hg2+, because of the presence of the calixarene moiety. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 1139–1144, 2003 |
| |
Keywords: | modification adsorption resins |
|
|