苯酚分子印迹微球的制备及吸附性能研究

作者以苯酚为模板分子,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,在乙腈溶剂中以偶氮二异丁腈（AIBN）为引发剂,采用沉淀聚合方法合成了苯酚分子印迹聚合物微球.通过扫描电镜和红外光谱对聚合物的结构和形貌进行了表征.并考察了溶液的pH,吸附时间及初始浓度对吸附量的影响,发现溶液的pH为7.0时分子印迹聚合物对苯酚的吸附量最大;吸附在20min左右达到平衡;随着溶浓度的增大,吸附量也随之增大,最后达到吸附平衡.实验结果表明苯酚分子印迹聚合物对苯酚具有较好的吸附能力,可将其用于对苯酚的吸附.

Preparation and Adsorption Property of Phenol Molecularly Imprinted Polymers

Phenol molecularly imprinted polymer was synthesized by precipitation polymerization method with metha- crylic acid （MAA）as the functional monomer, ethylene glycol dimethacrylate （EGDMA）as Cross-linking agent and phenol as a template molecule in acetonitrile solvent triggered with azobisisobutyronitrile （ AIBN）. The structure of the polymer was tramed by scanning electron microscopy and infrared spectroscopy. The effect of pH, adsorption time and the initial concentration to adsorption capacity was studied. The results showed that the solution of opti- mum pH for maximum sorption was 7.0, adsorption process reached the balance at 20 rain; with the phenol con- centration increasing, the amount of adsorption increased, then it reached equilibrium. The results showed that phenol molecularly imprinted polymer had a good adsorptivity for phenol.