Effect of Dose on Amount of Protein Adsorbed on Anion-Exchange Fibers Prepared by Radiation-Induced Emulsion Graft Polymerization

Abstract

The anion-exchange fiber was prepared by radiation-induced emulsion graft polymerization of glycidyl methacrylate (GMA) on a polyethylene (PE) fiber and subsequent chemical modifications. The PE fiber was irradiated with electron beam at various doses ranging from 20 to 200 kGy before GMA was graft-polymerized. Subsequently, the epoxy group of the poly-GMA graft chain was converted into a diethylamino (DEA) group with a molar conversion of 89 to 93％. At the degrees of GMA grafting of 85±8％, the anion-exchange fibers prepared at various doses up to 200 kGy exhibited a molar ratio of amount of Cl adsorbed to DEA group density of unity irrespective of dose. In contrast, the anion-exchange fiber prepared at 20 kGy exhibited 3.4-fold higher amount of bovine serum albumin adsorbed than that prepared at 200 kGy.