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本文采用乳液聚合法合成碳基磁性碳球(壳聚糖/γ-Fe2O3)@C,并在其表面上引入乙烯基,以2,4,5-三氯酚(2,4,5-TCP)为模板分子、甲基丙烯酸(MAA)为功能单体、乙二醇二甲基丙烯酸酯(EGDMA)为交联剂制备磁性碳球表面印迹聚合物。并利用扫描电子显微镜、紫外分光光度计、振动样品磁强计和热重分析仪等表征手段对其形貌、结构等物理化学性能进行表征,研究其热稳定性和磁稳定性,考察其作为吸附剂对2,4,5-三氯酚的吸附性能及选择性能。研究结果表明,磁性碳球和磁性碳球表面印迹聚合物(MMIPs)的饱和磁强度分别为4.3 emu/g和1.7 emu/g。吸附平衡数据表明其符合Freundlich吸附等温模型,平衡吸附量大约为200mg/g,吸附符合准二级动力学方程,平衡吸附时间大约为10 min,印迹吸附剂对模板分子吸附量最佳,且存在明显特异性吸附。
In this paper, the carbon-based magnetic carbon balls (chitosan / γ-Fe2O3) @C were synthesized by emulsion polymerization and vinyl groups were introduced on the surface of the carbon balls. 2,4,5-TCP ) As a template molecule, methacrylic acid (MAA) as a functional monomer and ethylene glycol dimethacrylate (EGDMA) as a cross-linking agent. The physical and chemical properties such as morphology and structure were characterized by means of scanning electron microscopy, ultraviolet spectrophotometer, vibrating sample magnetometer and thermogravimetric analyzer. The thermal and magnetic stability were investigated. Adsorption properties and selectivity of 2,4,5 - trichlorophenol adsorbents. The results show that the saturation magnetic intensities of MMIPs are 4.3 emu / g and 1.7 emu / g, respectively. Adsorption equilibrium data show that it is in accordance with the Freundlich adsorption isothermal model, the equilibrium adsorption capacity is about 200mg / g, the adsorption is in accordance with the quasi-second order kinetic equation, the equilibrium adsorption time is about 10 min, Clearly specific adsorption.