BORON SELECTIVE ADSORBENT BY RADIATION INDUCED GRAFT COPOLYMERIZATION OF VINYLBENZYL CHLORIDE ONTO NYLON FIBERS FOLLOWED AMINATION

摘要

A new boron selective adsorbent containing glucamine group was prepared by radiation induced graft copolymerization of vinylbenzyl chloride (VBC) onto nylon-6 fibers using electron beam irradiation followed by treatment with N-methyl-D-glucamine (NMDG). The degree of grafting (G%) in grafted fibers was tuned in the range of 10 – 130% by variation of grafting parameters such as monomer concentration, reaction time and reaction temperature. The density of functional group attached to the poly(VBC) grafted fibers was varied from 1.0 to 1.7 mmol/g-adsorbent. The introduction of poly(VBC) grafts and subsequent chemical treatment was confirmed by scanning electron microscopy (SEM). The adsorption capacity of the adsorbent of 130 G% and 1.7 mmol/g-adsorbent was 13.5 mg-B/gadsorbent. This value was found to be higher than that commercial Diaion CRB 03 resin which stands at an adsorption capacity of 12 mg-B/g-adsorbent. The obtained adsorbent seems to be a promising candidate for boron removal or recovery from solutions.