现代纺织技术2025，Vol.33Issue(6)：126-132,7.DOI:10.19398/j.att.202409010
驻极体对空气过滤用纳米纤维膜性能的影响
Influence of electrets on the performance of nanofiber membranes for air filtration
摘要
Abstract
The importance of high-performance air filtration materials has become increasingly prominent as air pollution becomes increasingly severe.Consequently,the research and development of high-efficiency and low-resistance filtration materials have become urgent tasks.Electrets primarily play a role in enhancing filtration effectiveness and improving filtration efficiency in air filtration membranes.Electret materials can form an electrostatic field on the surface of the filtration membrane,strengthening the electrostatic adsorption to attract and capture small particles in the air,thereby improving filtration performance.Due to the electrostatic effect,the electret filtration membrane can effectively capture more particles under lower airflow resistance and prolong the service life. The three electret materials,GO(graphene oxide),TiO2(titanium dioxide),and CS(chitosan),possess unique mechanical properties,adsorption capabilities,electrochemical characteristics,and antibacterial properties.These substances can control the diameters of electrostatic nanofibers at different levels,leading to varying pore sizes and consequently distinct filtration efficiencies and resistances.This paper reported the preparation of PAN(polyacrylonitrile)-based nanofiber membranes with improved filtration performance and reduced resistance by combining PAN with the three electrets of GO,TiO2,and CS using electrospinning technology.Firstly,the optimal spinning mass fraction of PAN was determined.Then,comparative experiments were conducted by combining PAN with different electrets.Subsequently,layered spinning was performed using spinning solutions doped with various electrets.In this paper,a series of tests were conducted on the prepared samples in terms of morphology composition,pore size measurement,wettability,tensile breaking strength,electret performance and filtration efficiency.Due to the differences in pore size and distribution,as well as fiber diameter among fiber webs with varying layers,the purpose of graded filtration for particles of different sizes can be achieved.Finally,the composite membrane was then analyzed for filtration efficiency and resistance to determine the best nanofiber membrane. The results indicate that the PGC composite nanofiber membrane exhibits advantages in pore size distribution,electret performance,and filtration performance.The average pore size of the PGC composite nanofiber membrane is 3.50 μm,with a water contact angle of 13.1°,a breaking force of 5.15 MPa,and a percentage of breaking elongation of 21.6％.The initial surface potential is 1.79 kV,and it stabilizes at 0.96 kV after 7 days.The filtration efficiency for PM2.5 particles reaches 99.9％,with a filtration resistance of 92 Pa.关键词
驻极体/静电纺丝/聚丙烯腈/空气过滤/纳米纤维膜Key words
electrets/electrospinning/polyacrylonitrile/air filtration/nanofiber membrane分类
化学化工引用本文复制引用
王玉红,肖焱,崔青云,杨文秀..驻极体对空气过滤用纳米纤维膜性能的影响[J].现代纺织技术,2025,33(6):126-132,7.基金项目
河北省创新能力提升计划项目(23554002K) （23554002K）
中国工艺美术学会2023年度工艺美术科研课题(CNACS2023-Ⅱ-07) （CNACS2023-Ⅱ-07）
