串珠纤维对静电纺纤维复合滤纸结构和性能的影响

Effect of Beaded Fiber on the Structure and Properties of Electrospun Fiber Composite Filter Media

关键词:  空气过滤  复合滤纸  静电纺  串珠纤维  过滤性能

Key Words:air filtration  composite filter media  elestrospinning  beaded fiber  filtration performance

摘要:本研究制备了静电纺串珠纤维复合滤纸和静电纺纳米纤维复合滤纸，对其微观形貌和孔径等结构特性以及过滤阻力、过滤效率和容尘量等过滤性能进行了分析。结果表明，静电纺串珠纤维复合滤纸和静电纺纳米纤维复合滤纸的纺丝层纤维平均直径接近，分别为225、250 nm。通过控制纺丝时间使二者的初始过滤阻力相近时，静电纺串珠纤维复合滤纸过滤效率为73.1%，静电纺纳米纤维复合滤纸过滤效率为38.2%。相同测试条件下，静电纺串珠纤维复合滤纸阻力上升速度比静电纺纳米纤维复合滤纸慢，达到相同终止阻力时，静电纺串珠纤维复合滤纸的作用时间更长、容尘量更大，二者的容尘量分别为119.29、96.23 g/m²；并采用仿真模拟软件GeoDict建立模型，探究了两者阻力变化情况和容尘量的差异。

Abstract:In this study， the electrospun beaded fiber composite filter media and the electrospun nanofiber composite filter media were prepared， and the structure characteristics such as microscopic morphology and pore size， as well as filtration performance such as filtration resistance， filtration efficiency and dust holding capacity were analyzed.The results showed that the average fiber diameters of them was close， which was 225 nm and 250 nm， respectively. When the initial pressure drop of them was similar by controlling the spinning time， the filtration efficiency of the electrospun beaded fiber composite filter media was 73.1% and that of the electrospun nanofiber composite filter media was 38.2%. The resistance of the electrospun beaded fiber composite filter media rose slower than that of the electrospun nanofiber composite filter media. When reaching same terminal pressure drop， the electrospun beaded fiber composite filter media gained a longer lifetime as well as a greater dust holding capacity. The dust holding capacity of the electrospun beaded fiber composite filter media and electrospun nanofiber composite filter media was 119.29 g/m² and 96.23 g/m²， respectively. The difference of resistance and dust loading capacity between the electrospun beaded fiber composite filter media and electrospun nanofiber composite filter media was analyzed by using simulation software GeoDict to build a model.