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Citation: XU Rui, YANG Qing, LI Yanbin, GAO Baojiao. Preparation of Thiocyanate Anion-Imprinted Microspheres via Inverse Suspension Polymerization and Their Ion Recognition Characteristics[J]. Chinese Journal of Applied Chemistry, ;2015, 32(8): 931-939. doi: 10.11944/j.issn.1000-0518.2015.08.140387 shu

Preparation of Thiocyanate Anion-Imprinted Microspheres via Inverse Suspension Polymerization and Their Ion Recognition Characteristics

1.
Department of Chemical Engineering, North University of China, Taiyuan 030051, China

Corresponding author: GAO Baojiao,
Received Date: 11 November 2014
Available Online: 9 February 2015
Fund Project: 国家自然科学基金青年科学基金资助项目(21404093) (21404093)

Micron-sized thiocyanate anion-imprinted microspheres (IIPMs) were prepared successfully with inverse suspension polymerization method.In the inverse suspension polymerization system,cyclohexane was used as dispersion medium and Span-60 was used as dispersant in the oil phase,cationic monomer of acryloxyethyltrimethyl ammonium chloride (DAC),the crosslinker N,N'-methylene bisacrylamide (MBA) and the template SCN^- anion were dissolved in aqueous phase.The crosslinking copolymerization of DAC in waterin-oil droplets was carried out and SCN^- IIPMs with diameter of about 200 μm were obtained.The ion recognition selectivity and binding property were investigated with monovalent anions,NO₃^-and I^-,as the references.In water-in-oil droplets,since cationic monomer DAC associates with SCN^- anion by strong electrostatic interaction,SCN^- anions are imprinted while DAC produces crosslinking polymer.The prepared IIPMs possess strong binding ability (3.3 mmol/g (192 mg/g)) and selectivity.The IIPMs can selectively recognize and bind SCN^- anion from a mixture with NO₃^-and I^- ions.The coefficients of the selectivity of IIPMs are 3.24 and 6.78,respectively.The IIPMs also exhibit excellent reusability.
- reversed phase suspension,
- imprinted microspheres,
- electrostatic interaction,
- ion imprinting,
- ion recognition
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