Synthesis and characterization of grafting β-cyclodextrin with chitosan

Two new adsorbents [β-cyclodextrin–chitosan (β-CD–CTS) and β-cyclodextrin-6–chitosan (β-CD-6-CTS)] were synthesized by the reaction of β-cyclodextrin (β-CD) with epoxy-activated chitosan (CTS) and the sulfonation of the C-6 hydroxyl group of β-cyclodextrin with CTS, respectively. Their structures were confirmed by IR spectral analysis and X-ray diffraction analysis, and their apparent amount of grafting was determined by ultraviolet spectroscopy. The adsorption properties of β-CD-CTS and β-CD-6-CTS for p-dihydroxybenzene were studied. The experimental results showed that the two new adsorbents exerted adsorption on the carefully chosen target. The highest saturated capacity of p-dihydroxybenzene of β-CD-CTS and β-CD-6-CTS were 51.68 and 46.41 mg/g, respectively. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 860–864, 2004