Experimental study on PM2.5 removal by magnetic polyimide loaded with cobalt ferrate

• Main Authors: Fashan Zhou, Yongfa Diao, Ruge Wang, Bingwen Yang, Teng Zhang
• Format: Article
• Language: English
• Published: KeAi Communications Co., Ltd. 2020-10-01
• Series: Energy and Built Environment
• Subjects: Magnetic polyimide; Cobalt ferrite; PM2.5; Filtration performance
• Online Access: http://www.sciencedirect.com/science/article/pii/S266612332030043X

A novel functional magnetic polyimide loaded with cobalt ferrite nanoparticles by coprecipitation method was proposed, and XRD, FTIR, SEM technologies were employed to study their physicochemical properties. The filtration performance of non-magnetic and magnetic polyimide were examined by experimental system. The effects of dust resistance, filtration velocity and initial dust concentration on the filtration performance of magnetic polyimide were investigated under different dust loadings. The results revealed that presence of ρ-л conjugation between the cobalt ferrite and polyimide fiber resulted in easily load on the fiber surface for cobalt ferrite nanoparticles. The magnetic polyimide exhibited good filtration efficiency especially in the range of particle size less than 2 µm. The filtration efficiency of magnetic polyimide filter materials increased by nearly 20% compared with the primary polyimide. Due to the loading of cobalt ferrite, the resistance of the magnetic polyimide increased, while the resistance growth rate decreased from 100% to 29% with increased filtration velocity from 0.5 m/min to 2.5 m/min.