Open AccessStudy on the Preparation and Application of Chitosan/Silica Cu(II) Imprinted Microspheres
Author(s) -
Min Zhang,
Chengyu Tan,
Jiaqi Hou,
Cheng Zhang,
Yiheng Xue
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/691/1/012005
Subject(s) - chitosan , glutaraldehyde , adsorption , silane , nuclear chemistry , materials science , chelation , polymer , metal ions in aqueous solution , chemical engineering , molecular imprinting , metal , polymer chemistry , chemistry , catalysis , selectivity , chromatography , organic chemistry , composite material , metallurgy , engineering
Molecularly imprinted polymers are functional polymers for selective recognition of imprinted molecules, which may have a wide range of applications in separation and purification, environmental monitoring, etc. Chitosan has excellent chelation for metal ions, being widely used in food, environmental protection, etc. In this paper, chitosan/silica Cu(II) imprinted microspheres were prepared by using natural product chitosan as functional monomer, silane-doped, Cu(II) as template ion and glutaraldehyde as crosslinking agent. The adsorption properties of the chitosan/silica Cu(II) imprinted microspheres for Cu( II) were studied by flame atomic absorption spectrometry. The experimental results showed that the adsorbability of Cu(II) on the chitosan/silica Cu(II) imprinted microspheres was better than that of chitosan/silica non imprinted microspheres. The results of orthogonal test showed that the order of influence on the adsorption capacity of the chitosan/silica Cu(II) imprinted microspheres was chitosan, glutaraldehyde, Cu(II) and silane. Under the optimum conditions, the adsorption capacity of the chitosan/silica Cu(II) imprinted microspheres for Cu(II) could reach 33.38mg/g. Scanning electron microscopy showed that the diameter of the chitosan/silica Cu(II) imprinted microspheres was lower than 3 urn. Chitosan/silica Cu(II) imprinted microspheres were obviously harder than chitosan Cu(II) imprinted microspheres.