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Highly selective and efficient imprinted polymers based on carboxyl‐functionalized magnetic nanoparticles for the extraction of gallic acid from pomegranate rind
Author(s) -
Zhang Junjie,
Li Benqiang,
Yue Huijuan,
Wang Jing,
Zheng Yuansuo
Publication year - 2018
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201700822
Subject(s) - gallic acid , nanomaterials , molecularly imprinted polymer , adsorption , polymer , magnetic nanoparticles , nanoparticle , chemistry , polymerization , crystallinity , molecular imprinting , surface modification , hydroxybenzoic acid , selectivity , chemical engineering , chromatography , materials science , organic chemistry , nanotechnology , catalysis , engineering , crystallography , antioxidant
With the combined surface imprinting technique and immobilized template strategy, molecularly imprinted magnetic nanoparticles were successfully prepared and coupled with high‐performance liquid chromatography to selectively separate and determine gallic acid from the pomegranate rind. On the surface of carboxyl‐functionalized magnetic nanospheres, thin imprinting shells were formed using dopamine as monomer and crosslinker. The characteristics, polymerization conditions, and adsorption performances of the resultant nanomaterials were investigated in detail. In addition of good crystallinity, satisfactory magnetism, and uniform morphology of the obtained polymers, they had rapid binding kinetics, high adsorption capacity, and favorable reusability. In the mixed solution of four hydroxybenzoic acids, the prepared nanomaterials have an excellent selectivity to gallic acid with an imprinting factor of as high as 17.5. Therefore, the polymers have great potentials in specific extraction and enrichment of gallic acid from the complex natural resources.