Abstract
Thermosensitive copolymer beads containing pyridyl groups were prepared by suspension polymerization of 4-vinylpyridine (4VP), N-isopropylacrylamide (NIPAAm), and tetraethyleneglycol dimethacrylate (4G) dissolved in chloroform, in saturated Na2SO4 aqueous solution in the presence of surfactant and MgCO3 as dispersant. Quaternized 4VP-NIPAAm-4G copolymer beads were obtained by the reaction of 4VP-NIPAAm-4G copolymer beads with alkyliodide. The 4VP-NIPAAm-4G copolymer beads had thrmosensitivity in water. The adsorption ability of the 4VP-NIPAAm-4G copolymer and the quaternized 4VP-NIPAAm-4G copolymers for surfactants, organic acids, food dyes, or Bisphenol-A was investigated under various conditions. It was found that 4VP-NIPAAm-4G and the quaternized copolymer beads had high adsorption ability for sodium dodecylbenzene sulfonate (SDBS) and Bisphenol-A (BPA).The adsorption of these compounds is mainly due to hydrophobic interaction between the copolymers and solutes.
