论文部分内容阅读
采用静电纺丝技术制备双酚A分子印迹聚醚砜纳米纤维膜.利用聚醚砜功能基与模板分子的相互作用形成结合位,其结构在纺丝过程中被固定下来,模板分子去除后聚醚砜纳米纤维膜上就留下能选择性结合目标分子的结合位.研究了模板分子加入量、静电纺丝电压和溶剂等纺丝条件对纳米纤维膜印迹效果的影响.识别实验表明,10%双酚A的聚醚砜印迹纳米纤维膜比非印迹纤维膜具有更高的结合量.选择性实验表明,10%双酚A的聚醚砜印迹纳米纤维膜在模板分子与对苯二酚、邻苯二酚或苯酚共存时,对双酚A有很高的选择性,而在模板分子与双酚F或对叔丁基苯酚共存时,对双酚的选择性稍差.Scatchard分析和双位点结合模型显示印迹纤维膜存在两类结合位点,且对双酚A具有很高的特异性结合常数和表观最大结合量.研究了印迹纤维膜的结合动力学.
Electrospinning technology was used to prepare bisphenol A molecularly imprinted polyethersulfone nanofibrous membrane. The binding sites were formed by the interaction of polyethersulfone functional groups and template molecules. The structure was fixed in the spinning process. The template molecules were removed after poly Ethersulfone nanofibrous membrane to leave a binding site that can selectively bind to the target molecule.The effects of the amount of template molecule, spinning voltage and solvents on the imprinting effect of nanofibrous membrane were studied.The recognition experiments showed that 10 % Of bisphenol A polyethersulfone imprinted nanofibrous membrane than non-imprinted fiber membrane has a higher binding capacity.Selective experiments showed that 10% bisphenol A polyethersulfone imprinted nanofibrous membrane in the template molecules and hydroquinone , Catechol or phenol coexist, the bisphenol A has a high selectivity, and in the presence of template molecules and bisphenol F or p-tert-butyl phenol, the selectivity of the bisphenol slightly worse.Scatchard analysis and The two-site binding model shows that there are two types of binding sites on the imprinted fiber membrane, and has a high specific binding constant and an apparent maximum binding capacity for bisphenol A. The binding kinetics of the imprinted fiber membrane was investigated.