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本文使用“接枝交联聚合与印迹过程同步进行”的分子表面印迹方法,以阳离子单体丙烯酰氧乙基三甲基氯化铵(DAC)为功能单体,以活性艳红X-3B(RBR)为模板分子,制备了酸性染料分子表面印迹材料,并考察了印迹材料的分子识别性能。在水溶液中,凭籍强静电相互作用与阳离子-π相互作用,阳离子单体DAC自动地结合在模板RBR分子周围,在氨基/过硫酸盐表面引发体系作用下,DAC及交联剂N,N’-亚甲基双丙烯酰胺(MBA)在硅胶微粒表面发生接枝交联聚合,制得了酸性染料分子表面印迹材料MIP-PDAC/SiO2。该分子表面印迹材料对RBR分子具有高度的识别选择性,相对于结构与RBR相似的活性黄X-RG和活性嫩黄X-6G两种酸性染料,MIP-PDAC/SiO2对RBR的识别选择性系数分别为8.1和8.9。
In this paper, the molecular surface imprinting method of “cross-linking polymerization and imprinting process synchronously” was used. With cationic monomer acryloyloxyethyltrimethylammonium chloride (DAC) as functional monomer and reactive brilliant red X -3B (RBR) as the template molecule, the acid dye molecular imprinting material was prepared, and the molecular recognition performance of the imprinted material was investigated. In aqueous solution, the cationic monomer DAC is automatically bound around the template RBR molecule by virtue of the strong electrostatic interaction with the cation-π interaction. Under the action of the system initiated by the amino / persulfate surface, the DAC and the crosslinking agent N, N ’- methylene bisacrylamide (MBA) grafting cross - linked polymerization on the surface of the silica particles to prepare the acid dye molecular imprinting material MIP-PDAC / SiO2. The molecularly imprinted material has a high degree of recognition selectivity for RBR molecules. Compared with RBR-like active X-RG and reactive X-6G acid dyes, MIP-PDAC / SiO2 has a high recognition selectivity for RBR Respectively 8.1 and 8.9.