Publication: Magnetic field-induced polymerization of molecularly imprinted polymers
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Publication Date
2018-05-10
Authors
Cortés Llanos, Belén
Aroca, Claudio
Presa Muñoz del Toro, Patricia de la
Moreno Bondi, Maria C.
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Amer Chemical Soc
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Abstract
In this work, we developed a novel approach for the preparation of molecularly imprinted polymer (MIP) coatings directly onto magnetic multicore nanoparticles (MMCs) using alternating magnetic fields to trigger the polymerization reaction. MIPs were synthesized with rhodamine 123 (R123) as model template molecule, methacrylic acid as functional monomer, and trimethylolpropane trimethacrylate as cross-linker. The amount of iron oxide nano particles and the composition of the polymerization mixture were optimized to enable the thermal polymerization of a thin MIP shell on each MMC using electromagnetic heating without altering the properties of the recognition layer. The thickness of the polymerized MIP layer grafted onto the MMCs was fine-tuned by adjusting the dose of electromagnetic field (101.4 kHz, total power dissipation = 105 W). The resulting magnetic multicore MIP nanoparticles (MMC-MIPs) were characterized by FT-R and X-ray diffraction spectroscopy, transmission electron microscopy, and dynamic light scattering.
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© Amer Chemical Soc.
This research work was funded by the Spanish Ministry of Economy and Competitiveness (MINECO) under projects CTQ2015-69278-C2-1R and MAT2015- 67557-C2-1-P). J.L. Urraca thanks CEI-Moncloa for a post-doctoral contract. B. Cortés-Llanos acknowledges funding from MINECO (FPI program). The authors thank the staff at Micronanofabs Facilities and J.L. Prieto for valuable discussions.