Wang Han, Bao Yiliang, Yang Xiuding, Lan Xingzi, Guo Jian, Pan Yiliang, Huang Weimin, Tang Linjun, Luo Zhifeng, Zhou Bei, Yao Jingsong, Chen Xun
State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China.
Foshan Nanofiberlabs Co., Ltd., Foshan 528225, China.
Polymers (Basel). 2022 Aug 12;14(16):3294. doi: 10.3390/polym14163294.
At present, the situation of air pollution is still serious, and research on air filtration is still crucial. For the nanofiber air filtration membrane, the diameter, porosity, tensile strength, and hydrophilicity of the nanofiber will affect the filtration performance and stability. In this paper, based on the far-field electrospinning process and the performance effect mechanism of the stacked structure fiber membrane, nanofiber membrane was prepared by selecting the environmental protection, degradable and pollution-free natural polysaccharide biopolymer pullulan, and polyvinylidene fluoride polymer with strong hydrophobicity and high impact strength. By combining two kinds of fiber membranes with different fiber diameter and porosity, a three-layer composite nanofiber membrane with better hydrophobicity, higher tensile strength, smaller fiber diameter, and better filtration performance was prepared. Performance characterization showed that this three-layer composite nanofiber membrane had excellent air permeability and filtration efficiency, and the filtration efficiency of particles above PM 2.5 reached 99.9%. This study also provides important reference values for the preparation of high-efficiency composite nanofiber filtration membrane.
目前，空气污染形势依然严峻，空气过滤研究仍至关重要。对于纳米纤维空气过滤膜，纳米纤维的直径、孔隙率、拉伸强度和亲水性会影响过滤性能及稳定性。本文基于远场静电纺丝工艺及叠层结构纤维膜的性能作用机制，选用环保、可降解且无污染的天然多糖生物聚合物普鲁兰多糖以及疏水性强、冲击强度高的聚偏氟乙烯聚合物制备纳米纤维膜。通过将两种纤维直径和孔隙率不同的纤维膜相结合，制备出了疏水性更好、拉伸强度更高、纤维直径更小且过滤性能更佳的三层复合纳米纤维膜。性能表征表明，这种三层复合纳米纤维膜具有优异的透气率和过滤效率，对PM 2.5以上颗粒物的过滤效率达到了99.9%。该研究也为高效复合纳米纤维过滤膜的制备提供了重要参考价值。
