Preparation of molecularly imprinted polymer foam and selective adsorption and separation of cyhalothrin
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摘要: 利用疏水性二氧化硅粒子和少量的非离子表面活性剂Hypermer 2296构建稳定的油包水型Pickering HIPEs,以三氟氯氰菊酯(LC)为模板分子,丙烯酰胺(AM)和聚乙二醇二甲基丙烯酸酯(PEGDMA)为聚合前驱体,制备了具有规则开孔结构的分子印迹聚合物泡沫材料(MIPFs)。利用静态吸附研究了MIPFs选择性吸附分离LC的行为和机理,并考察MIPFs结构对于吸附作用的影响。结果表明,MIPFs对LC的吸附属于单分子层吸附,符合准二级动力学模型,MIPFs对LC具有较好的选择性识别能力,可以有效分离食品中残留的LC成分,提高聚酯类农残检测的精密度。Abstract: In this paper, the stable water-in-oil type Pickering HIPEs was prepared with hydrophobic silica particles and nonionic surfactants Hypermer 2296, and then MIPFs with regular open pore structure were prepared with LC as the template molecule, AM and PEGDMA as the polymeric precursor.The behavior modification and mechanism of selective adsorption and separation of MIPFs for LC were studied using static adsorption experiment, and the influence of MIPFs structure for adsorption had also been researched. The results showed that the adsorption of MIPFs for LC was monolayer adsorption process and belonged to the level 2 dynamic model. The adsorption quantity of MIPFs for LC showed that MIPFs for LC had the good selective recognition ability, so MIPFs can effectively separated the residued LC from food, and improve the precision of the test for polyester residues.
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Keywords:
- molecularly imprinted polymer foam /
- cyhalothrin /
- preparation /
- selective adsorption
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