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Received November 4, 2014
Accepted March 22, 2015
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Highly selective magnetic polymer particles via molecular imprinting
Shandong Institute of Nonmetallic Materials, China North Industries Group Corporation, Jinan, Shandong, P. R. China 1School of Aerospace, Transport and Manufacture, Cranfield University, Bedfordshire, U.K., UK 2Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, Sichuan, P. R. China
tooqiu@163.com
Korean Journal of Chemical Engineering, November 2015, 32(11), 2355-2360(6), 10.1007/s11814-015-0055-5
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Abstract
Magnetic hydrophilic molecularly imprinted polymer (MIP) particles were successfully synthesized via an inverse suspension polymerization in silicone oil, by employing methacryloxypropyltrimethoxysilane(MPS)-modified Fe3O4 nanoparticles as magnetic particles, 2,4-dichlorophenoxyacetic acid (2,4-D) as template, hydroxyethyl methacrylate (HEMA) as hydrophilic monomer, and acetonitrile as high polar porogen. The synthesized magnetic hydrophilic MIP particles could be separated rapidly under an external magnetic field. About 94% transmittance of the particlewater suspension could be reached within 20 min by magnetic separation, whereas about 84% transmittance was achieved after at least 180min by sedimentation. The adsorption capacity of the particles was also studied in pure aqueous environments. These hydrophilic MIP particles had a higher selectivity for templates. Hydrophilic MIP particles took on a higher imprinting factor than hydrophobic MIP particles and 2,4-D were able to rebind hydrophilic MIP particles more easily than 4-Chorophenoxyacetic acid.
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References
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