摘要
Molecularly imprinted polymer(MIP)beads imprinted with vitamin E(V_(E))were synthesized via a two-step swelling polymerization method,using methacrylic acid(MAA)and other functional monomers together with polystyrene(PS)microspheres as the substrate.In initial trials,different functional monomers were assessed,along with a variety of solvents and imprinting ratios.The MIP_(MAA) sample exhibited the highest performance and was characterized and also assessed with regard to V_(E) adsorption under various experimental conditions.This material exhibited reasonably good sphericity,porosity and stability,along with an excellent adsorption capacity of 46 mg/g.This was much higher than the value for the corresponding non-imprinted polymer made with the same monomer,and 20%higher than that for an acrylamide-based MIP synthesized using a precipitation polymerization method.The core-shell structured MIP_(MAA) also demonstrated fast adsorption kinetics,a low pressure drop and good reusability in fixed bed experiments.The V_(E) adsorption equilibrium,selectivity,kinetics,thermodynamics and regeneration capacity of this material were also examined and are reported herein.
基金
This work was supported by the Jiang Su Yu Xin Vitamin Co.,Ltd.,China.
