College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, P. R. China.
Institute of Frontier Materials, Deakin University, Geelong, VIC, 3216, Australia.
Small. 2022 Apr;18(14):e2107250. doi: 10.1002/smll.202107250. Epub 2022 Feb 14.
Particulate matter (PM) pollution has become a serious environmental concern. Nanofibrous filters are widely reported to remove PM from polluted air. Herein, efficient and lightweight PM air filters are presented using airflow synergistic needleless electrospinning composed of auxiliary fields such as an airflow field and a secondary inductive electric field. Compared to needleless electrospinning with other spinnerets, it significantly improves productivity, fiber diameter, and porosity of fibrous air filters. The instant noodle-like nanofiber structure can also be controlled by adjusting the airflow velocity. These air filters exhibit high (2.5 μm particulate matter) PM removal efficiency (99.9%) and high (0.3 μm particulate matter) PM removal efficiency (99.1%), low pressure drop (56 Pa for PM and 78 Pa for PM ), and large dust holding capacitance (the maximum value is 168 g m for PM , while 102 g m for PM ). Meanwhile, the proposed PM filters are also tested suitable and stable to other polluted air filtrations such as cigarette smoke and sawdust. The large-scale synthesis of such an attractive nanofiber structure presents the great potential of high-performance filtration/separation materials.
颗粒物 (PM) 污染已成为严重的环境问题。纳米纤维过滤器被广泛报道可去除污染空气中的 PM。在此，使用气流协同无针静电纺丝（包括气流场和二次感应电场等辅助场）制备了高效、轻质的 PM 空气过滤器。与其他喷丝头的无针静电纺丝相比，它显著提高了纤维过滤器的生产率、纤维直径和孔隙率。通过调节气流速度，还可以控制类似方便面的纳米纤维结构。这些空气过滤器对 2.5 μm 颗粒物 (PM) 的去除效率（99.9%）和 0.3 μm 颗粒物 (PM) 的去除效率（99.1%）均较高，压降较低（PM 为 56 Pa，PM 为 78 Pa），粉尘保持电容较大（最大值为 PM 时为 168 g·m ，PM 时为 102 g·m ）。同时，所提出的 PM 过滤器也经过测试适合并能稳定地用于其他污染空气过滤，如香烟烟雾和木屑。这种有吸引力的纳米纤维结构的大规模合成呈现出高性能过滤/分离材料的巨大潜力。
