Magnetic molecularly imprinted microcapsules derived from Pickering emulsion polymerization and their novel adsorption characteristics for λ-cyhalothrin
Magnetic molecularly imprinted microcapsules derived from Pickering emulsion polymerization and their novel adsorption characteristics for λ-cyhalothrin
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DOI：
10.1039/c3ra43178a
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发表时间：
2014
期刊：
影响因子：
3.9
通讯作者：
Jianming Pan;Wenjing Zhu;Xiaohui Dai;Xue Yan;Mengyin Gan;Linzi Li;Hui Hang;Yongsheng Yan
中科院分区：
文献类型：
--
作者：
Jianming Pan;Wenjing Zhu;Xiaohui Dai;Xue Yan;Mengyin Gan;Linzi Li;Hui Hang;Yongsheng Yan
采用Pickering乳液聚合法合成了磁性分子印迹微胶囊。在这项工作中，水包油的皮克林乳液稳定埃洛石纳米管（HNTs）的存在下，一些亲水性的Fe 3 O 4纳米粒子作为磁分离载体的第一次建立。印迹体系是通过自由基聚合和随后的组合与功能和聚合物单体在油相中。对Pickering乳液和MMIMs的形成机理进行了详细的讨论，并成功地评价了MMIMs作为高效氯氟氰菊酯吸附剂的性能。结果表明，MMIMs具有磁敏感性（Ms = 8.45 emu g-1），中空结构，半透性外表面和优异的鲁棒性。批式实验表明，印迹效应同步改善了MMIMs的吸附动力学和平衡。选择性识别实验也表明MMIMs对λ-氯氟氰菊酯的亲和力和选择性高于氰戊菊酯和邻苯二甲酸二乙酯。
Magnetic molecularly imprinted microcapsules (MMIMs) were synthesized by Pickering emulsion polymerization. In this work, an oil-in-water Pickering emulsion stabilized by halloysite nanotubes (HNTs) was first established in the presence of a few hydrophilic Fe3O4 nanoparticles as magnetic separation carriers. The imprinting system was fabricated by radical polymerization and subsequent combination with functional and polymeric monomers in the oil phase. The formation mechanism of the Pickering emulsion and MMIMs is discussed in detail, and the as-prepared MMIMs are successfully evaluated as sorbents for the recognition of λ-cyhalothrin. The results demonstrated that the MMIMs exhibited magnetic sensitivity (Ms = 8.45 emu g−1), a hollow structure, a semipermeable external surface and excellent robustness. The batch mode experiments proved that the imprinting effect synchronously improved the adsorption kinetics and equilibrium for the MMIMs. The selective recognition experiments also suggested high affinity and selectivity of MMIMs towards λ-cyhalothrin over fenvalerate and diethyl phthalate.