熔体微分静电纺聚丙烯空气驻极体滤膜的制备及其性能

Preparation and properties of polypropylene air filter membrane by melt differential electrospinning

为解决空气滤膜过滤效率和过滤阻力之间的矛盾,采用熔体微分静电纺丝方法结合驻极技术制备了不同工艺条件下的聚丙烯复合驻极体纤维膜,并对其形貌特征、荷电能力、过滤性能进行表征与分析。结果表明:随着电气石可质量分数的增加,纤维膜由白色趋于灰色,颜色逐渐加深;纤维带同种电荷相互排斥,使得纤维呈开放型疏松结构,纤维形貌出现轻微隆起,有效降低过滤阻力;添加电气石可有效提高纤维膜的荷电能力和过滤性能,当电气石质量分数为2.0%时综合效果最佳,电荷储存稳定性好,对粒径大于或等于0.3μm颗粒的过滤效率高达99.23%,过滤阻力为8.6 Pa。

In order to solve the contradiction between the filtration efficiency and the filtration resistance of the air filter membrane,the polypropylene composite electret fiber membranes under different process conditions were prepared by melt differential electrospinning combined with electret technology,and the morphology characteristics,charging capacity and filtration performance thereof were characterized.The results show that with the increase of tourmaline content,the fiber membrane tends to be gray from white,and the color of fiber membrane is gradually deepened.The same kind of electric charges repel each other,enduing the fiber with open and loose structure,appearing slight projection in the fiber morphology to effectively reduce filtration resistance.The added tourmaline effectively improves the charging capacity and filtration performance of the fiber.When the tourmaline content is 2.0%,the comprehensive effect is the best,and the charge storage stability is good.The filtration efficiency of particle size smaller than 0.3μm is 99.23%,and the filtration resistance is 8.6 Pa.