摘要
分子印迹聚合物(MIP)制备的目标是获得在空间和结合位点上与某一分子(模板分子或印迹分子)完全匹配的聚合物.因其具有构效预定性、特异识别性和广泛实用性三大特点而发展迅速.分子印迹复合膜是在现有膜的基础上,在其表面或膜孔中制备一层分子印迹聚合物,使其既有MIP的特点,又有膜的稳定性.以对氯苯酚为模板分子,偏氟膜为支撑膜,丙烯酰胺或甲基丙烯酸为功能单体,乙二醇二甲基丙烯酸酯(EDMA)为交联剂,采用热引发原位聚合方法制备了对氯苯酚分子印迹聚合物膜.通过FTIR与扫描电子显微镜对膜进行进行了表征,研究了分子印迹膜对对氯苯酚及其结构类似物(2-氯苯酚、苯酚)的静态吸附量.结果表明:印迹复合膜对模板分子对氯苯酚的吸附量约为非印迹膜的3倍;且对模板分子对氯苯酚及异构体2-氯苯酚的吸附量远远大于苯酚,可能是复合膜上印迹聚合物的孔穴要比苯酚尺寸大的原因.
Molecularly imprinted composite membranes were synthesized successfully by in-situ polymerization. Poly ethylene flu- oride（PVDF） film was used as supporting membrane,a layer of molecularly imprinted polymer was polymerized with p -chloro- phenol （4 - CP） as template, acrylamide （AM） as functional monomer, ethylene glycol dimethacrylate （EDMA） as crosslinker and azobisiobutyronitrile （AIBN） as initiator by thermopolymerization. The structure and surface morphology of MIM were charac- terized by FT - IR and SEM. The adsorption capacity of the membrane was performed by static adsorption method. The maximum adsorption was almost three times than the blank membrane. The imprinted membrane showed higher selectrivity for 4 - cp than phenol, but similar with its anologue 2 - chlorophenol. The reason for this result maybe was that the size of the cave made by the template in the imprinted composite membrane was a little bigger than that of phenol molecule.
出处
《上海师范大学学报（自然科学版）》
2011年第6期615-618,共4页
Journal of Shanghai Normal University(Natural Sciences)
关键词
分子印迹
对氯苯酚
偏氟膜
选择性
molecularly imprinted composite membranes
p -chlorophenol
poly ethylene fluoride
selectivity
