Semi-covalent Preparation Of Bisphenol A Surface Imprinted Polymer And Study On Its Adsorption Properties

Bisphenol A(BPA)is a typical endocrine disrupting chemical,there is low concentration in complex environment that needs rapid separation and enrichment.To this end,molecularly imprinted polymers(MIPs)are valuable to research selective recognition of BPA for separation and enrichment through MIT.So far,most of the MIPs are prepared or used in organic agent,but in fact,most of BPA is in aqueous system.According to this situation,two kinds of MIPs were synthesised for adsorbing different system of BPA.BPA-MIPs were synthesized by 2,2’-bis-(4-aminophenyl)-propane was creatively chose as the template due to the covalent reaction between BAA and MAA.Characterization of the physical and chemical properties of BPA-MIPs was done by using scanning electron microscopic,Fourier transform infrared spectrometer and EDS analysis,thermogravimetric analyzer which revealing that molecularly imprinted polymers grafted onto the silica surface successfully.The binding properties of BPA-MIPs for BPA are evaluated by the adsorption kinetic,adsorption isotherms,selective adsorption and regeneration.The balanced adsorption capacity of BPA-MIPs were 7.8mg/g until 18min.Hydrophilic-MIPs were synthesized by surface molecular imprinting technology though semi-covalent method.Disodium 4-[2-(4-oxidophenyl)propan-2-yl]phenolate was creatively chose as the pseudo template and Methacryloyl chloride was functional monomer,the functions of β-CD were providing hydrophilic group and recognition sites.Characterization and adsorption of the Hydrophilic-MIPs were indicate that The balanced adsorption capacity of BPA-MIPs were 8.2mg/g until 15min,and the contact angles was 7.5°.