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Reference type: Journal
Authors: Pan JM, Yin YJ, Zhang YL, Wu RR, Dai XH, Yan YS
Article Title: Thermoresponsive and magnetic molecularly imprinted polymers based on iron oxide encapsulated carbon nanotubes as a matrix for the selective adsorption and controlled release of 2,4,5-trichlorophenol.
Publication date: 2015
Journal: Journal of Applied Polymer Science
Volume: 132
Issue: (27)
Page numbers: ArticleNo42087.
DOI: 10.1002/app.42087

Abstract: Thermoresponsive and magnetic molecularly imprinted polymers (TMMIPs) based on magnetic carbon nanotubes (MCNTs) were prepared and applied to the switched recognition and controlled release of 2,4,5-trichlorophenol (2,4,5-TCP) from aqueous solution. In this study, MCNTs were first synthesized via the encapsulation of Fe3O4 nanoparticles into the tunnel of carbon nanotubes by a wet impregnation technology. Then, the TMMIPs were synthesized with N-isopropyl acrylamide as a thermal functional monomer by free-radical polymerization. The magnetic sensitivity and stability of the prepared materials were tested with a vibrating sample magnetometer (saturation magnetization = 1.4 emu/g) and atomic absorption spectrophotometer (in the pH range 3.0-8.0), respectively. The thermoresponsive properties of the TMMIPs were evaluated by two means, including the results of ultraviolet-visible spectroscopy and the controlled release of 2,4,5-TCP at 30 and 40 C, respectively. The effects of the pH, initial concentration, and contact time on adsorption were examined with batch mode experiments, and several other compounds were selected as model analytes to evaluate the selective recognition performance of the TMMIPs. This demonstrated that the TMMIPs had a higher affinity for 2,4,5-TCP than did the thermoresponsive and magnetic nonimprinted polymers. 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42087
Template and target information: 2,4,5-trichlorophenol, 2,4,5-TCP
Author keywords: adsorption, composites, magnetism and magnetic properties


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