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

作　　者：Fashan Zhou Yongfa Diao Ruge Wang Bingwen Yang Teng Zhang 

机构地区：[1]School of Environmental Science and Engineering,Donghua University,Shanghai 201620,PR China

出　　处：《Energy and Built Environment》2020年第4期404-409,共6页能源与人工环境（英文）

基　　金：supported by the National Key Research and Develop-ment Program of China(2018YFC0705300);the Special Funds and Key Projects of Fundamental Scientific Research Business Fees in Central Universities(2232017A-09,CUSF-DH-d-2017097).

摘　　要：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 filtra-tion 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 of𝜌-лconjuga-tion 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 2μm.The filtration efficiency of magnetic polyimide filter materials increased by nearly 20%com-pared 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.

关 键 词：Magnetic polyimide Cobalt ferrite PM2.5 Filtration performance 

分 类 号：O63[理学—高分子化学]