Citation: HUANG Weiwei, ZHAO Qianyu, YANG Xin, YAO Lei, ZHAO Haitian. Synthesis and applications of epoxy-functionalized bi-functional magnetic molecularly imprinted polymers for polysaccharide adsorption[J]. Chinese Journal of Chromatography, ;2019, 37(7): 673-682. doi: 10.3724/SP.J.1123.2019.01018 shu

Synthesis and applications of epoxy-functionalized bi-functional magnetic molecularly imprinted polymers for polysaccharide adsorption

1.
School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150090, China;
2.
Food Science College, Northeast Agricultural University, Harbin 150030, China

Received Date: 15 January 2019

Fund Project: National Natural Science Foundation of China (No. 31000831)

A polysaccharide-imprinted nanoparticle composite material with bi-functional monomers molecularly imprinted polymers (Bi-MMIPs) was successfully synthesized in aqueous solution by using starch as the template, 3-aminobenzeneboronic acid (APBA) as the functional monomer, 2-acrylamide-2-methylpropanesulfonic acid (AMPS) as the co-functional monomer, and ammonium persulfate (APS) as the initiator. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), and Fourier-transform infrared (FT-IR) spectroscopy were used to characterized Bi-MMIPs. The adsorption and recognition characteristics of Bi-MMIPs for starch were investigated in detail by using the static method, dynamic method, and competitive adsorption experiments. The TEM, SEM and FT-IR results showed that the two functional monomers were loaded on the surface of Bi-MMIPs. Bi-MMIPs possessed very strong adsorption affinity and specific recognition for starch. The saturated adsorption capacity reached 13.88 mg/g, and the selectivity coefficients relative to glucosans M_r 5000 Da and 70000 Da were 2.67 and 3.77, respectively. Despite the imprinting factor of Bi-MMIPs (α=3.04), Bi-MMIPs were regenerated easily and exhibited excellent recognition, selectivity, and reusability for adsorbing starch. To elucidate the mechanism, APBA and AMPS showed synergy effect in synthesizing bi-functional monomers by providing reversible covalent bonds and hydrogen bonds, respectively, which could effectively enhance the spatial arrangement of combining sites for template molecular.
- epoxy-functionalized,
- bi-functional molecularly imprinted polymers,
- polysaccharide,
- adsorption kinetics
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1.
沈阳化工大学材料科学与工程学院沈阳 110142