碳基双酚A温敏分子印迹聚合物的制备及吸附性能研究

摘要

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0.07 g, 交联剂用量为10 mmol, 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5.129 mg/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, Aazodiisobutyronitrile (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 about 0.07 g);BPA-C@T-MIP exhibits good recognition towards BPA (up to 5.129 mg/g) and temperature-sensitive.Meanwhile, adsorption mechanism is monolayer adsorption obeyed by a first order kinetics equation.