Abstract This work develops an embossed nanofiber membranes (ENMs) using 3D patterns for use in air mask filtration and compares this structure with a planar nanofibrous materials (PNMs). The embossed nanofiber membrane (ENM) was prepared using a combination of 3D printing and electrospinning technologies to increase the surface area of the ENM compared to that of planar structures. The surface area of the ENM was three times higher (66 m3 g−1) than that of the PNM (23 m3 g−1). The embossing structure depended on hole size and height of the grid in the 3D pattern. The pore size of the nanofiber membranes (NMs) was controlled to 0.2 μm to enable robust filtration of ultrafine airborne particle and smog pollutants. The polyamide 6 ENM achieved excellent filtration efficiency via corona surface ionic modification with ( CH2CHCONH2+) or anion ( NHCH2COO−). Ion-modification generated an electrostatic attraction or van der Waals force/repulsive force between pollutant particles and the NM surface. The dynamic particle barrier efficiency of ionic ENMs was evaluated by dynamic particle removal efficiency (%), penetration (%), resistance (mmH2O), and air permeability (m3/m2/min) tests. Well-developed pore structures and large surface area of the NM were enhanced by the embossed structure compared to that of PNM.

中文翻译：

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用于去除 PM0.2 的强大过滤性能的压花纳米纤维材料的制备和改性

摘要 这项工作开发了一种使用 3D 图案的压花纳米纤维膜 (ENM)，用于空气面罩过滤，并将这种结构与平面纳米纤维材料 (PNM) 进行比较。与平面结构相比，使用 3D 打印和静电纺丝技术的组合来制备压花纳米纤维膜 (ENM)，以增加 ENM 的表面积。ENM 的表面积 (66 m3 g-1) 是 PNM (23 m3 g-1) 的三倍。压花结构取决于 3D 图案中的孔尺寸和网格高度。纳米纤维膜 (NMs) 的孔径控制在 0.2 μm，以实现对超细空气中颗粒和烟雾污染物的强大过滤。聚酰胺 6 ENM 通过使用 (CH2CHCONH2+) 或阴离子 (NHCH2COO−) 进行电晕表面离子改性实现了出色的过滤效率。离子改性在污染物颗粒和纳米表面之间产生静电吸引力或范德华力/排斥力。通过动态颗粒去除效率 (%)、渗透率 (%)、阻力 (mmH2O) 和透气性 (m3/m2/min) 测试评估离子 ENM 的动态颗粒阻隔效率。与 PNM 相比，压纹结构增强了 NM 发达的孔结构和大表面积。渗透率 (%)、阻力 (mmH2O) 和透气性 (m3/m2/min) 测试。与 PNM 相比，压纹结构增强了 NM 发达的孔结构和大表面积。渗透率 (%)、阻力 (mmH2O) 和透气性 (m3/m2/min) 测试。与 PNM 相比，压纹结构增强了 NM 发达的孔结构和大表面积。