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Preparation and Ion Recognition Characteristics of a Trichloroacetic Acid Surface‐Imprinted Material
In this work, a trichloroacetic acid (TCAA) surface‐imprinted material with high performance was prepared. In an aqueous solution, the molecules of the cationic monomer acryloyloxyethyl‐trimethyl ammonium chloride (DAC) arranged around the template TCAA anion via electrostatic interaction. By initiating of the surface‐initiating system of –NH2/S2O82−, the graft/cross‐linking polymerization of DAC and the crosslinker N,N′‐Methylenebisacrylamide and the TCAA surface‐imprinting were simultaneously carried out on SiO2 particles, forming TCAA anion surface‐imprinted material IIP‐PDAC/SiO2. With monochloroacetic acid (MCAA) and phenylacetic acid (PAA) as two contrast acids, the recognition character of the imprinted material IIP‐PDAC/SiO2 was investigated. This imprinted material possesses special recognition selectivity and excellent binding affinity for TCAA anion. The binding amount of IIP‐PDAC/SiO2 particles for TCAA reaches 0.93mmol/g, whereas their binding amounts for MCAA and PAA are only 0.48 mmol/g and 0.15 mmol/g, respectively. The selectivity coefficients of IIP‐PDAC/SiO2 for TCAA relative to MCAA and PAA anions are 3.61and 9.12, respectively.
Preparation and Ion Recognition Characteristics of a Trichloroacetic Acid Surface‐Imprinted Material
In this work, a trichloroacetic acid (TCAA) surface‐imprinted material with high performance was prepared. In an aqueous solution, the molecules of the cationic monomer acryloyloxyethyl‐trimethyl ammonium chloride (DAC) arranged around the template TCAA anion via electrostatic interaction. By initiating of the surface‐initiating system of –NH2/S2O82−, the graft/cross‐linking polymerization of DAC and the crosslinker N,N′‐Methylenebisacrylamide and the TCAA surface‐imprinting were simultaneously carried out on SiO2 particles, forming TCAA anion surface‐imprinted material IIP‐PDAC/SiO2. With monochloroacetic acid (MCAA) and phenylacetic acid (PAA) as two contrast acids, the recognition character of the imprinted material IIP‐PDAC/SiO2 was investigated. This imprinted material possesses special recognition selectivity and excellent binding affinity for TCAA anion. The binding amount of IIP‐PDAC/SiO2 particles for TCAA reaches 0.93mmol/g, whereas their binding amounts for MCAA and PAA are only 0.48 mmol/g and 0.15 mmol/g, respectively. The selectivity coefficients of IIP‐PDAC/SiO2 for TCAA relative to MCAA and PAA anions are 3.61and 9.12, respectively.
Preparation and Ion Recognition Characteristics of a Trichloroacetic Acid Surface‐Imprinted Material
Gao, Baojiao (author) / Zhang, Tintin (author) / Chen, Tao (author)
Water Environment Research ; 87 ; 404-413
2015-05-01
10 pages
Article (Journal)
Electronic Resource
English
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