HYPERCROSSLINKED SORBENTS AND THEIR ADSORPTION PROPERTIES

Abstract

Hypercrosslinked sorbents which have excellent adsorption capacities for organic compounds were prepared by cross-linking the polypropylene grafted styrene-divinylbenzene fiber according to the Friedel-Crafts reaction. As crosslinking agents, we have used monochloromethylether and bis-chloromethylated derivatives of benzene or biphenyl. We have performed detailed investigations of the preparation and the optimal synthesis conditions of hypercrosslinked sorbents were obtained. Compared with the initial fiber, hypercrosslinked fibers were remarkable materials exhibiting high specific surface area and exceptional adsorption properties for organic compounds. The adsorption capacities on the hypercrosslinked sorbents were related with the size of cross-linking agents, which increased by about 8 to 10 fold.
KEY WORDS: Hypercrosslinked sorbents, Fibers, Surfaces; Adsorption; Organic compounds

Bull. Chem. Soc. Ethiop. 2007, 21(3), 397-403.