In this paper, the ferric hydroxide colloid was prepared firstly, which was found suitable for the stabilizer of Pickering emulsion because of proper hydrophilicity. Then, molecularly imprinted polymers (MIPs) microspheres were synthesized by means of facile Pickering emulsion polymerization using ferric hydroxide colloid as emulsifier. In the synthesis process, hydrophilic methacrylic acid was used for the functional monomer, and ethylene glycol dimethacrylate served as the crosslinking agent. Bisphenol A (BPA), a typical endocrine-disrupting chemical, was used for the template molecules. The whole synthesis was based on the hydrogen bonds interaction between the functional monomer and template molecule. The ferric hydroxide colloid could be removed from the surface of microspheres by gentle washing. The morphology of obtained MIPs microspheres were assessed through the optical microscope and field emission scanning electron microscope, respectively. The results suggested that the MIPs appeared the regular spherical form with relatively wide size distribution, whose diameter varied from 10 to 60 μm. The adsorptive property was studied detailedly through a series of rebinding experiments. The research showed that MIPs have fast binding kinetics, whose rebinding equilibrium in tested concentration could be achieved within 60 min, and the rebinding capacity in 0.3 mmol L⁻¹ of BPA initial solution is 8.19 μmol g⁻¹. Additionally, the binding capacities of MIPs were larger than that of non-imprinted polymers in the batch equilibrium binding experiments. The binding selectivity was investigated with 4, 4′-biphenol and hydroquinone, which played the role of the structurally similar compounds of template molecules. The result showed that the MIPs were highly selective for BPA, and the imprinting factor was calculated to be 1.63. Reusability experiment indicates that our prepared MIPs have good mechanical stability and could be reused at least 5 times. The MIPs microspheres would be valuable in the field of environmental protection.

本文首先制备了氢氧化铁胶体，该胶体具有适当的亲水性，适合作为Pickering乳液的稳定剂。然后，使用氢氧化铁胶体作为乳化剂，通过简便的 Pickering 乳液聚合合成分子印迹聚合物（MIPs）微球。合成过程中以亲水性甲基丙烯酸为功能单体，乙二醇二甲基丙烯酸酯为交联剂。双酚 A (BPA) 是一种典型的内分泌干扰化学品，用于模板分子。整个合成基于功能单体和模板分子之间的氢键相互作用。氢氧化铁胶体可以通过温和洗涤从微球表面去除。分别通过光学显微镜和场发射扫描电子显微镜评估获得的 MIPs 微球的形态。结果表明，MIPs呈规则的球形，粒径分布较宽，直径从10到60μm不等。通过一系列再结合实验详细研究了吸附性能。研究表明，MIPs具有快速的结合动力学，其在测试浓度下的再结合平衡可在60分钟内达到，再结合能力在0.3 mmol·L 通过一系列再结合实验详细研究了吸附性能。研究表明，MIPs具有快速的结合动力学，其在测试浓度下的再结合平衡可在60分钟内达到，在0.3 mmol·L时的再结合能力 通过一系列再结合实验详细研究了吸附性能。研究表明，MIPs具有快速的结合动力学，其在测试浓度下的再结合平衡可在60分钟内达到，在0.3 mmol·L时的再结合能力^-1的BPA初始溶液是8.19微摩尔克^-1。此外，在批次平衡结合实验中，MIP 的结合能力大于非印迹聚合物的结合能力。用4, 4'-联苯酚和氢醌研究了结合选择性，它们起到了模板分子结构相似化合物的作用。结果表明，MIPs 对 BPA 具有高度选择性，印记因子计算为 1.63。重复使用性实验表明，我们制备的 MIPs 具有良好的机械稳定性，至少可以重复使用 5 次。MIPs微球在环境保护领域具有重要价值。