ie5028099_si_001.pdf (635.1 kB)
Preparation and Evaluation of Water-Compatible Surface Molecularly Imprinted Polymers for Selective Adsorption of Bisphenol A from Aqueous Solution
journal contribution
posted on 2014-09-17, 00:00 authored by Feifei Duan, Chaoqiu Chen, Lin Chen, Yongjiao Sun, Yunwei Wang, Yongzhen Yang, Xuguang Liu, Yong QinWater-compatible
molecularly imprinted polymers (MIPs) for adsorbing
bisphenol A (BPA) in aqueous solutions are synthesized using water-soluble
monomer as surface hydrophilicity-increasing agent via surface addition–fragmentation
chain transfer polymerization. The formation and structure of these
hybrid materials are verified by Fourier transform infrared spectroscopy,
contact angle studies, thermogravimetric analysis, and scanning electron
microscopy. The characterization and adsorption results indicate that
the molecularly imprinted polymers prepared with 2-acrylamido-2-methylpropanesulfonic
acid (AMPS/MIPs) are water-compatible (the contact angle is 14°).
The excellent dispersion of AMPS/MIPs in water provides more opportunity
for BPA molecules to access the imprinted cavities and improves their
recognition characteristics. The kinetics and isotherm data of AMPS/MIPs
can be well described by the pseudo-second-order kinetic model and
the Langmuir isotherm, respectively. The thermodynamic studies indicate
that the adsorption process is a spontaneous exothermic process.