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Preparation and Ion Recognition Characteristics of a Trichloroacetic Acid Surface‐Imprinted Material
Author(s) -
Gao Baojiao,
Zhang Tintin,
Chen Tao
Publication year - 2015
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143015x14212658614162
Subject(s) - trichloroacetic acid , chemistry , ion , chromatography , chemical engineering , organic chemistry , engineering
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 –NH 2 /S 2 O 8 2− , the graft/cross‐linking polymerization of DAC and the crosslinker N,N′ ‐Methylenebisacrylamide and the TCAA surface‐imprinting were simultaneously carried out on SiO 2 particles, forming TCAA anion surface‐imprinted material IIP‐PDAC/SiO 2 . With monochloroacetic acid (MCAA) and phenylacetic acid (PAA) as two contrast acids, the recognition character of the imprinted material IIP‐PDAC/SiO 2 was investigated. This imprinted material possesses special recognition selectivity and excellent binding affinity for TCAA anion. The binding amount of IIP‐PDAC/SiO 2 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/SiO 2 for TCAA relative to MCAA and PAA anions are 3.61and 9.12, respectively.