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Citation: WU Yunxia, HUANG Jing, YIN Zhengzhi, ZENG Yanbo, ZHANG Zulei, LI Lei. Properties of Rhodamine B' Magnetic Molecularly Imprinted Polymers Prepared from the Suspension Polymerization Method[J]. Chinese Journal of Applied Chemistry, ;2013, 30(12): 1481-1488. doi: 10.3724/SP.J.1095.2013.20594 shu

Properties of Rhodamine B' Magnetic Molecularly Imprinted Polymers Prepared from the Suspension Polymerization Method

WU Yunxia ^a,b, ,
HUANG Jing ^a,b ,
YIN Zhengzhi ^b ,
ZENG Yanbo ^b ,
ZHANG Zulei ^b ,
LI Lei ^b

a. College of Chemistry Engineering, Changzhou University, Changzhou 213016, China;
b. College of Biology and Chemical Engineering, Jiaxing University, Jiaxing 314001, China

Received Date: 10 December 2012
Revised Date: 3 May 2013

We used a suspension polymerization method to prepare magnetic molecularly imprinted polymers by using Rhodamine B as the template molecule. The obtained materials were characterized,and their properties were compared with those obtained from bulk polymerization. The results reveal that,Fe₃O₄ magnetic nanoparticles of the two kinds of polymers show good crystal morhpologies. The shape of M-MIPs prepared by suspension polymerization are regular with the microspheres size about 50 μm. Saturation magnetization of the M-MIPs (suspension polymerization) is 5.406 emu/g, which is larger than that obtained from bulk polymerization (1.772 emu/g). In addition,the former is in favour of the fast magnetic separation than the latter. Compared with bulk polymerization,the adsorption of M-MIPs (suspension polymerization) is 1.8 times higher. In terms of adsorption's capacity,selectivity and reusability,the results of M-MIPs (suspension polymerization) are superior to those of bulk polymerization. Two kinds of adsorbents follow the Langmuir adsorption model. The processes of suspension polymerization and bulk polymerization can be fitted to the second-order and first-order kinetics adsorption,respectively. Through comparative studies,the M-MIPs of suspension polymerization possess high selective adsorption properties to Rhodamine B molecules,which can be used in enrichment and analysis application.
- magnetic molecularly imprinted polymers,
- magnetic separation,
- suspension polymerization,
- bulk polymerization,
- Rhodamine B
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