Highly permeable pocket-shaped microfiltration membranes with binary porous structures, which are composed of brominated poly(2,6-dimethyl-1,4-phenylene oxide) (BPPO), were prepared on needles by breath figure (BF) and colloidal crystal template (CCT) methods. In colloidal crystal templates, the membrane pore size in the bottom layer was adjusted by SiO₂ microsphere diameter in the colloidal crystal template, while that in the top layer was adjusted by changing the BPPO concentration. The permeability of the binary porous membrane prepared by BF and CCT methods was higher than that of membranes only prepared by the BF method. Due to high permeability and antifouling properties, the pocket shaped binary porous membrane was connected to a syringe and used as a filter film in microfiltration and sample preparation fields.

中文翻译：

---

具有二元多孔结构的袋状微滤膜的制备

通过呼吸图（BF）和胶体晶体模板在针上制备了具有二元多孔结构的高渗透性袋状微滤膜，该膜由溴化聚（2,6-二甲基-1,4-苯撑氧）（BPPO）组成（CCT）方法。在胶体晶体模板中，通过SiO ₂调节底层的膜孔径胶体晶体模板中的微球直径，而顶层中的微球直径是通过改变BPPO浓度来调节的。BF法和CCT法制备的二元多孔膜的渗透率高于BF法制备的二元多孔膜的渗透率。由于具有高渗透性和防污性能，将袋状二元多孔膜连接到注射器上并在微滤和样品制备领域用作滤膜。