A novel β-cyclodextrin polymer modified by sulfonate groups

Based on the special properties and advantages of β-cyclodextrin (β-CD), β-CD polymers have been widely studied and used in recent years. A lot of researches have focused on the adsorption and separation properties of β-CD polymers. In this paper, β-CD polymer modified by sulfonate groups, which was named S-β-CDP, was prepared using epichlorohydrin as crosslinker and tiron (1,2-dihydroxybenzene-3,5-disulfonic acid disodium salt) as modifier. β-CD polymer without modification, which was named β-CDP, was also prepared for comparison. Infrared spectra, elemental analysis and adsorption tests of S-β-CDP were carried out and compared with β-CDP. The content of sulfonate groups in S-β-CDP was obtained from elemental analysis. The dramatically increased adsorption capability toward methylene blue and basic magenta confirmed the existence and chemical activity of sulfonate groups in S-β-CDP. Due to the convenient preparation process and modified adsorption properties, S-β-CDP will find its applications in various fields such as water purification, drug loading, separation and analysis.