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Article
Preparation of thermosensitive, calix[4]arene incorporated P(NIPAM-co-HBCalix) hydrogel as a reusable adsorbent of nickel(II) ions
Article first published online: 15 MAR 2013
DOI: 10.1002/pola.26625
Copyright © 2013 Wiley Periodicals, Inc.
Issue
Journal of Polymer Science Part A: Polymer Chemistry
Volume 51, Issue 11, pages 2401–2408, June 2013
Additional Information
How to Cite
Yan, F., Wang, M., Cao, D., Guo, S. and Chen, L. (2013), Preparation of thermosensitive, calix[4]arene incorporated P(NIPAM-co-HBCalix) hydrogel as a reusable adsorbent of nickel(II) ions. J. Polym. Sci. A Polym. Chem., 51: 2401–2408. doi: 10.1002/pola.26625
Publication History
- Issue published online: 26 APR 2013
- Article first published online: 15 MAR 2013
- Manuscript Accepted: 29 JAN 2013
- Manuscript Received: 15 NOV 2012
Funded by
- National Natural Science Foundation of China. Grant Number: 50973084
- Science and Technical Development Foundation of Colleges and Universities, Tianjin, China. Grant Number: 20071214
- Abstract
- Article
- References
- Cited By
Keywords:
- adsorption;
- Calix[4]arene; hydrogel;
- nickel(II) ions removal;
- N-isopropylacrylamide;
- supramolecular structures
ABSTRACT
A calix-conjugated thermo-responsive hydrogel containing 15% tetra(5-hexenyloxy)-p-tert-butylcalix[4]arene (HBCalix), P(NIPAM-co-HBCalix), was used to remove nickel(II) ions from water. Both thermo-sensitive properties and the Ni2+-adsorption capabilities of the prepared P(NIPAM-co-HBCalix) hydrogels are investigated. Introduction of the monomer HBCalix considerably enhanced the adsorption of Ni2+ onto the hydrogel by chelation between hexenyloxy groups and metal ion. When HBCalix units capture Ni2+ and forms HBCalix/Ni2+ host–guest complexes, the lower critical solution temperature of the hydrogel shifts to a higher temperature due to both the repulsion between charged HBCali/Ni2+ groups and the osmotic pressure within the hydrogel. Adsorption studies were carried out by varying contact time, counter ion and initial concentration of Ni2+. The evaluation of adsorption properties showed that the hydrogel exhibited better correlation with Langmuir isotherm model. P(NIPAM-co-HBCalix) could be used repeatedly with little loss in adsorption capacity by simply changing the environmental temperature. This kind of ion-recognition hydrogel is promising as a novel adsorption material for adsorption and separation of Ni2+ ions. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 2401–2408