双酚F分子印迹聚合物的制备及其对水相中双酚F吸附性能的研究

以双酚F(4,4′-BPF)为模板分子,α-甲基丙烯酸(MAA)为功能单体,乙二醇二甲基丙烯酸酯(EGDMA)为交联剂,偶氮二异丁腈(AIBN)为引发剂,采用沉淀聚合法合成4,4′-BPF分子印迹聚合物(MIPs)。运用傅里叶红外(FT-IR)光谱对产物的结构进行表征,并对其吸附等温线、吸附动力学、吸附热力学及选择性识别性能进行研究。结果表明:MIPs对水相中4,4′-BPF具有特异性吸附,最大吸附容量为82.8 mg/g;Freundlich模型拟合吸附等温线的相关系数R2=0.995;热力学参数ΔG、ΔS、ΔH均小于0,表明此吸附过程是自发进行的、熵减的、放热的。

Preparation of Bisphenol F Moleculary Imprinted Polymers and Their Adsorption Capability in Aqueous Phase

Molecularly imprinted polymers (MIPs) for removing bisphenol F in aqueous solutions were synthesized by precipitation polymerization method using bisphenol F as template,α-methacrylicas as functional monomer,ethylene glycoldimethacrylate as cross-linker and azobisisobutyronitrile as initiator.Characterization of the obtained MIPs was achieved by Fourier transform infrared (FT-IR) spectroscopy.Adsorption isotherm,kinetic,thermodynamic and selectivity experiments were investigated in this study.The experiment results show that MIPs exhibit high affinity and selectivity toward bisphenol F in aqueous solution.The adsorption capacity of MIPs on bisphenol F is 82.8 mg/g.Freundlich adsorption model can well describe the adsorption isothermals of bisphenol F.The negative values of thermodynamic parameter indicate that the adsorption process is a spontaneous exothermic process.