One-step building of molecularly imprinted polymer microcapsules with multicore structure by Pickering emulsion polymerization

摘要

Novel molecularly imprinted polymer (MIP) microcapsules with multicore structure were prepared through one step Pickering emulsion polymerization combined with the polymerization driven phase separation. Bisphenol A (BPA) is found to play the part of heterogeneous nuclei besides template molecule, which offers opportunity for the building of the multicore structure inside of MIP microcapsules. The internal structure of MIP microcapsules could be regulated by choosing different kinds of template molecules. Rebinding experiments showed that the MIP with multicore structure possessed excellent binding properties toward BPA. The imprinting factor of MIP toward BPA is 1.96. The binding could reach equilibrium within 30 min. The fast rebinding kinetics was attributed to the unique multicore structure which reduced largely the mass transfer resistance of BPA in the MIP.