氧化石墨烯杂化分子印迹复合膜制备及性能研究

采用改进的Hummers法，通过冷冻干燥制备了氧化石墨烯(GO)。以辛弗林盐酸盐为模板分子，水溶性的丙烯酰胺为功能单体，离子液体(溴代1-丁基-3-甲基咪唑)为致孔剂，把GO加入聚合液中，制备了GO杂化的分子印迹复合膜(GO-MIM)。利用透射电镜、扫描电镜、X射线衍射和红外光谱等方法对GO及GO-MIM进行了表征。通过将分子印迹膜技术与GO相结合，明显提高了分子印迹膜的力学性能。吸附及渗透实验表明，GO-MIM可在纯水溶剂体系，对辛弗林盐酸盐具有很好的选择性吸附能力和优先透过能力，体现了明显的分子印迹效果。

Preparation and properties of graphene oxide hybrid molecularly imprinted composite membranes

Graphene oxide (GO) was prepared by the improved Hummers method and freeze-drying method. With synephrine hydrochloride as the template molecule, water-soluble acrylamide as the functional monomer, and ionic liquid (1-butyl-3-methylimidazole bromide) as the porogen, GO was added to the polymerization solution to prepare graphene oxide hybrid molecularly imprinted composite membrane (GO-MIM). Transmission electron microscopy, scanning electron microscopy, X-ray diffraction, and infrared spectroscopy were used to characterize GO and GO-MIM. By combining molecularly imprinted membrane technology with GO, the mechanical properties of MIM are significantly improved. Adsorption and permeation experiments show that GO-MIM can be used in pure water solvent system and has a good selective adsorption capacity and preferential permeability for synephrine hydrochloride.