摘要
以萘和蒽为双模板分子,以甲基丙烯酸为功能单体、二甲基丙烯酸乙二醇酯为交联剂、聚乙烯醇(PVA)为分散剂,通过悬浮聚合制备了双模板分子印迹微球.采用紫外光谱法分析了双模板分子印迹效应产生的机制,用静态吸附实验考察了印迹微球对海水中2—3环多环芳烃的吸附选择性,并以分子印迹-分散固相微萃取法分析了海水中2—3环的多环芳烃.结果表明,双模板-功能单体分子间的多位点协同作用,优化了分子印迹材料的印迹孔穴,提高了双模板分子印迹微球的分子识别能力;所制备的双模板分子印迹材料使用3次后其选择识别性能未显著降低,显示出其富集与分离海水样品中2—3环多环芳烃的良好前景.
Double molecularly imprinted polymeric microspheres（DMIPM） were prepared via heat-initiating polymerization with naphthalene and anthracene as the template molecules,acrylamide as the functional monomer,ethylene glycol dimethacrylate as the cross linker and polyvinyl alcohol as dispersant by using suspension polymerization.Static adsorption was employed to evaluate the recognition properties of the MIPMs.The binding mechanism of the double template molecular polymer was explored by the ultraviolet-visible spectrophotometry.The experiments revealed that the prepared DMIMP exhibited high selectivity and good recognition ability to naphthalene and anthracene than the MIPMs using single template molecule.The possible reasons were that the synergistic action of the two template molecules optimized the cavities of molecularly imprinted polymer（MIP） and increased the selective adsorptive capacity of MIP.A dispersive solid-phase microextraction（DSPME） method for the determination of trace 2—3 ring PAHs in seawater was proposed.Results showed that the recognition ability of the DMIPM didn′t descend even when the DMIPM was used repeatedly for 3 times.The DMIPM provides a new material for selective enrichment and determination of trace 2—3 ring PAHs in complex seawater.
出处
《环境化学》
CAS
CSCD
北大核心
2012年第1期9-15,共7页
Environmental Chemistry
基金
国家863项目(2006AA09Z176)
山东省自然科学基金项目(Y2007B38)资助
关键词
双模板分子印迹微球(DMIPM)
悬浮聚合
分散固相微萃取
多环芳烃
double molecularly imprinted polymeric microspheres（DMIPM）
suspension polymerization
dispersive solid-phase microextraction（DSPME）
PAHs.
