Influencing the selectivity of grafted anion exchangers utilizing the solubility of the radical initiator during the graft process.

ABSTRACT: A previously published radical graft-functionalization method for the synthesis of high performance anion exchangers was further investigated to control the capacity and selectivity of the exchangers. Using a hydrophobic radical initiator instead of a hydrophilic one diminished the influence of rivaling homopolymerization of monomer during the functionalization step. Instead of only generating monomer radicals in free solution the radicals are ideally generated on top of the PS/DVB surface. However, in both cases the selectivity factors of polarizable anions bromide and nitrate in relation to chloride increased strongly with increasing capacity of the exchanger. Higher exchanger capacities could lead to coelution of bromide and/or nitrate with other analytes such as sulfate or phosphate wh

SUBMITTER: Kaltz A 

PROVIDER: S-EPMC7587026 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature