MACROPOROUS POLYAMINES CONTAINING CYCLODEXTRIN - SYNTHESIS, CHARACTERIZATION, AND SORPTION PROPERTIES

Macroporous beads containing N-vinyl-tertio-butyl carbamate (NVTBC) ha ve been prepared by suspension copolymerization using divinylbenzene a s crosslinking agent. After solvolysis, parent copolymers containing v inylamine (VA) were functionalized by beta-clodextrin (beta-CD) using the mono-tosyl derivative of beta-CD as the intermediate (beta-CDOTs). Several copolymers with various degrees of substitution were synthesi zed. Several factors (reaction time, amounts of the reactants, composi tion of solvent, and temperature) were studied. Characterization was a chieved by crosspolarization magic angle spinning nuclear magnetic res onance spectroscopy( CPMAS NMR). The textural features (specific area and porous volume) of the beads were also determined. These insoluble macroporous copolymers containing beta-CD were then used for the recov ery of various organic pollutants from aqueous solutions. Some prelimi nary studies (time, concentration, kinetics, and beta-CD content) are presented here. The results of sorption experiments show that they exh ibit high sorption capacities toward substituted benzene derivatives. The mechanism of sorption is an acid-base interaction due to the amino groups of the polymer network and/or the formation of an inclusion co mplex due to the beta-CD molecules. (C) 1998 John Wiley & Sons, Inc.