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Synthesis and Adsorption Properties for Metal Ions of Crosslinked Chitosan Acetate Crown Ethers by Shuying Tan; Yuting Wang; Changhong Peng; Yurong Tang is a Materials Science article available to read on EtoBox.

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Two novel chitosan derivatives-crosslinked chitosan dibenzo-16-c-5 acetate crown ether (CCTS-1) and crosslinked chitosan 3,5-di-tert-butyl dibenzo-14-c-4 diacetate crown ether (CCTS-2)-were synthesized by the reaction of crosslinked chitosan with dibenzo-16-c-5 chloracetate crown ether and 3,5-di-tert-butyl dibenzo-14-c-4 dichloracetate crown ether with the intent of forming polymers that could be used in hazardous waste remediation as toxic metal-binding agents in aqueous environments. Their structures were confirmed with elemental analysis, infrared spectral analysis, and X-ray diffraction analysis. In the infrared spectra of CCTS-1 and CCTS-2, the characteristic peaks of aromatic backbone vibration appeared at 1595 cm Ϫ1 and 1500 cm Ϫ1 ; the intensity of the NOH and OOH stretching vibration in the region of 3150 -3200 cm Ϫ1 decreased greatly. The X-ray diffraction analysis showed that the peak at 2 ϭ 20°decreased greatly in CCTS-1 and CCTS-2. The adsorption and selectivity properties of CCTS-1 and CCTS-2 for Pb 2ϩ , Cu 2ϩ , Cr 3ϩ , and Ni 2ϩ were studied. Experimental results showed that the two crosslinked chitosan derivatives had not only good adsorption capacities for Pb 2ϩ ,

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Author

Shuying Tan; Yuting Wang; Changhong Peng; Yurong Tang

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0021-8995)

Published

1999

Language

EN

Field

Materials Science (Physical Sciences)