孔雀石绿印迹聚合物的合成及在结构类似物去除中的应用

Applying of Molecularly Imprinted Polymers in the Removing of Malachite Green and its Analogues

以孔雀石绿为模板分子,丙烯酸和丙烯酰胺为复合功能单体,N,N-亚甲基双丙烯酰胺为交联剂,采用辉光放电电解等离子体引发技术,通过沉淀聚合法制备了孔雀石绿分子印迹聚合物。利用扫描电镜和红外光谱对印迹聚合物进行表征,并对其吸附性能进行了测试。实验结果表明,制备的分子印迹聚合物对孔雀石绿的吸附在60 min时基本达到饱和,吸附过程符合Freunlich模型。分子印迹聚合物对孔雀石绿吸附能力大于空白聚合物。竞争吸附实验表明,孔雀石绿分子印迹聚合物对孔雀石绿及其结构类似物具有很好的吸附能力和选择性,去除率均在70%以上,结晶紫和孔雀石绿的去除率超过了95%。

Molecularly imprinted polymers for malachite green(MG)were synthesized by precipitation polymerization method using malachite green as the template,acrylamide and acrylic acid as composite functional monomer,N,N-methylenebisacrylamide as crosslinker,initiated by glow discharge electrolysis plasma.The molecularly imprinted polymers were characterized by scanning electron microscopy(SEM)and infrared(IR)analysis,and their adsorption properties were tested.Experimental results showed that the adsorption of MG by the prepared molecular imprinting polymer was saturated at 60 min and the adsorption process conforms to the Freunlich model.The adsorption of MG by molecular imprinting polymer is greater than that by non-imprinted polymers.The competitive adsorption results indicated that molecularly imprinting polymer has good adsorption capacity and selectivity for MG and its analogues.The removal was above 70%,furthermore,the removal of crystal violet and MG was more than 95%.