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以聚偏氟乙烯微孔滤膜为支撑膜,烟酸为模板分子,用紫外光引发表面修饰聚合制备了微孔滤膜支撑-烟酸分子印迹复合膜.电镜扫描对该印迹复合膜进行了表面形态表征.Scatchard分析表明,在所研究的浓度范围内分子印迹复合膜中存在等价的结合位点,结合位点的平衡离解常数Kd为5.55×10-2mmol·L-1.底物的结合和渗透选择性实验表明,分子印迹复合膜对烟酸有较好的结合性能,结合量是6.10μmol·g-1.与其结构类似的化合物烟酰胺相比,分子印迹复合膜对模板分子展示了更好的选择性及高度的识别能力.
The microporous membrane support-niacin molecularly imprinted composite membrane was prepared by using polyvinylidene fluoride (PVDF) microporous membrane as supporting membrane and nicotinic acid as template, UV-initiated surface modification polymerization was carried out. Electron microscopy Surface morphological characterization.Scatchard analysis showed that there was an equivalent binding site in the molecularly imprinted composite membrane at the concentration range studied, and the equilibrium dissociation constant Kd at the binding site was 5.55 × 10-2mmol·L-1. The binding and permeation selectivity experiments showed that the molecularly imprinted composite membrane had good binding ability to nicotinic acid, the binding capacity was 6.10μmol · g-1. Compared with the nicotinamide with similar structure, A better choice and a high degree of recognition.