两种酪胺磁性分子印迹聚合物的制备及比较

以酪胺为模板分子,分别以羧基化葡聚糖和硅烷偶联剂修饰的磁性纳米粒子为载体成功合成两种酪胺磁性分子印迹聚合物(dex-MMIPs和MPS-MMIPs)。通过透射电子显微镜(TEM)和傅里叶变换红外光谱(FT-IR)结果表明,两种磁性纳米粒子均成功制备。动态吸附中dex-MMIPs在20 min左右达到吸附平衡,而MPS-MMIPs在60 min左右达到吸附平衡,通过对静态吸附实验结果进行Scatchard分析,得到Q_m分别为7.4、6.4 mg·g^-1。以上结果证明以羧基化葡聚糖修饰的磁性纳米粒子为载体合成的dex-MMIPs在吸附性能,传质效率要优于MPS-MMIPs。

Preparation and Comparison of Two Tyramine Magnetic Molecularly Imprinting Polymers

Two magnetic molecularly imprinted polymers which used tyramine as template molecule were successfully prepared. The magnetic nanoparticles (MNPs) were modified with carboxymethyl dextran and silane coupling agent, respectively. The characterization results of transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FT-IR) indicated that the two magnetic nanoparticles were successfully produced. Adsorption equilibrium test showed that the adsorption capacity of the dex-MMIPs reached the binding equilibrium within 20 min while the MPS-MMIPs need 60 min. The Q_m of two MMIPs were 7.4 and 6.4 mg·g-1, respectively. The above results showed that the synthesized dex-MMIPs had better adsorption and mass transfer efficiency than that of the MPS-MMIPs.