The synthesis of magnetic molecularly imprinted polymer against di-(2-ethylhexyl)phthalate

Abstract

Magnetic molecularly imprinted polymer (MMIP) was prepared against di-(2-ethylhexyl)phthalate, using methacrylic acid as a functional monomer, ethylene glycol dimethacrylate as a crosslinker and benzoyl peroxide as an initiator. MMIP was characterized using Scanning Electron Microscope and infrared spectrophotometer. IR spectrum shows successful preparation of MMIP. The peak at 586 cm−1 is a typical vibration of Fe-O. The strong peaks at 1728 cm−1, 1261 cm−1, and 1153 cm−1 are stretching vibration of C=O and C-O of methacrylic acid and DEHP. The peak at 1462 cm−1 due to C-C aromatic vibration of DEHP. A broad absorption band at 3468 cm−1 due to the stretching vibration of hydroxyl bonds between target molecule and functional monomer. The MMIP has a spherical morphology and pores that important for adsorption process. Experimental results show the potential of magnetic molecularly imprinted polymer for recognition of di-(2-ethylhexyl) phthalate.

Synthesis of Molecularly Imprinted Polymers with Magnetite Cores for Ibuprofen Adsorption

“…Nanoparticles Fe3O4 were synthesized by the coprecipitation method [16]. A 0.5580 g of FeSO4.7H2O and 1.1160 g of FeCl3.6H2O were dissolved in 100 mL of deionized water and stirred until homogenous at 80°C.…”

“…The MMIPs were prepared using the bulk polymerization method [15,16]. One mmol of IBP and 4 mmol of MAA were dissolved in 10 mL of acetonitrile and stirred to create a pre-polymerization solution.…”

“…The use of Fe3O4 nanoparticles in the synthesis of MMIPs, modified in this way, results in nanosized MMIPs, enlarging the surface area of the adsorbent and yielding a high adsorption capacity. In contrast, the MMIPs synthesized using the precipitation polymerization method result in an irregular shape and require grinding [16].…”

“…Therefore, MIPs are modified with magnetic particles (MMIPs) to facilitate separation using an external magnet without requiring centrifugation or filtration, allowing quick binding and separation [14]. Additionally, by incorporating magnetite particles, the resulting polymer can be nano-sized, as magnetite serves as the core, leading to uniform shapes without grinding [15,16].…”