Abstract In this article, a magnetic-responsive microfiltration membrane based on three-dimensional (3 D) inverse colloidal crystal (ICC) was prepared with relatively simple approach. We designed the ICC membrane using self-assembly of Fe3O4@SiO2 colloidal crystal into a colloidal crystal template. The resulting close-packed colloidal crystal was infiltrated with a reactive monomer solution. After polymerization, the silica spheres were etched away, resulting in an ICC membrane with Fe3O4 nanoparticles inside. The typical ICC membrane was characterized by SEM and XRD. Meanwhile, We used the KCl diffusion to test the permeability of the membrane. The results illustrated that the highly ordered permeable polymer membrane was successfully prepared by using Fe3O4@SiO2 colloidal crystals as the templates. Furthermore, the functional ICC membrane exhibited excellent magnetic-responsive gating property to separation. The smart environment-responsive gating membranes have potential applications in filtration, sensors and other applications.

中文翻译：

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一种基于三维逆胶体晶体的智能磁响应微滤膜

摘要 本文采用相对简单的方法制备了一种基于三维（3D）反胶体晶体（ICC）的磁响应微滤膜。我们使用 Fe3O4@SiO2 胶体晶体自组装成胶体晶体模板设计了 ICC 膜。用反应性单体溶液渗透所得密堆积的胶体晶体。聚合后，二氧化硅球体被蚀刻掉，形成内部含有 Fe3O4 纳米颗粒的 ICC 膜。典型的ICC膜通过SEM和XRD表征。同时，我们使用KCl扩散来测试膜的渗透性。结果表明，以Fe3O4@SiO2胶体晶体为模板，成功制备了高度有序的聚合物渗透膜。此外，功能性ICC膜对分离表现出优异的磁响应门控特性。智能环境响应门控膜在过滤、传感器和其他应用中具有潜在应用。