碳基双酚A温敏分子印迹聚合物的制备及吸附性能研究

Preparation and Adsorption Property of BPA Thermo Sensitive and Moleculary Imprinted Material Based on Carbon Spheres

通过乙烯基功能化来修饰水热碳球,同时以N-异丙基丙烯酰胺(N-Isopropylacrylamide)为温敏单体、过硫酸钾(Potassium persulfate)作为引发剂、使用N,N-亚甲基双丙烯酰胺(N,N′-Methylenebis(2-propenamide))接枝温敏单体;然后以乙二醇二甲基丙烯酸酯(Ethylene glycol dimethacrylate)为交联剂,在引发剂偶氮二异丁腈(Aazodiisobutyronitrile)的作用下与模板分子双酚A(bisphenol A)反应,制备碳基BPA温敏性分子印迹聚合物.利用热重(TG)、紫外可见分光光度计(UV)、差示扫描量热仪(DSC)、扫描电镜(SEM)、红外分析(FT-IR)等表征手段分析印记聚合物的形貌、结构和吸附性能.结果表明:引发剂用量为0.07g,交联剂用量为10mmol,印迹微球规整,对双酚A具有高度的选择识别性、再生性和温度响应性;平衡吸附量为5.129mg/g,为单分子层吸附且符合一级动力学模型.

Temperature-responsive molecularly imprinted polymer of Bisphenol-A（BPA） based on carbon nanospheres （CSs） were prepared, in which N-Isopropyl acrylamide （NIPAM） as temperature-responsive monomer, Potassium persulfate（KPS） as initiator, N,N-methylene double acrylamide （MBA） successfully grafted temperature sensitive polymer on surface of CSs, which were modified by inyl-functionalizing. Molecularly imprinted polymer of Bisphenol-A（BPA） on the surface thermosensitive molecularly carbon nanospheres （CSs） was synthesized by using the Bisphenol-A （BPA） as template agent, Aazodi- isobutyronitrile （AIBN） as initiator, and Ethylene glycol dimethacrylate （EGDMA） as crosslinking agent. SEM, FT-IR, UV absorption spectra analyzer and TG were applied to analysis the morphology, structure and adsorption property of BPA-C@T-MIP. The experiment results show that the prepared BPA-C@T-MIP possesses a regular surface morphology （cross-linking agent about 10 mmg, initiator a- bout 0.07 g） ;BPA-C@T-MIP exhibits good recognition towards BPA （up to 5. 129 mg/g） and tempera- ture-sensitive. Meanwhile, adsorption mechanism is monolayer adsorption obeyed by a first order kinetics equation.