Large-scale blow spinning of heat-resistant nanofibrous air filters  

作　　者：Ziwei Li Jianan Song Yuanzheng Long Chao Jia Zhenglian Liu Lei Li Cheng Yang Junchen Liu Sen Lin Haiyang Wang Yibo Liu Minghao Fang Hui Wu 

机构地区：[1]State Key Laboratory of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing,100084,China [2]School of Materials Science and Technology,China University of Geosciences,Beijing,100083,China [3]State Key Laboratory of Information Photonics and Optical Communications and School of Science,Beijing University of Posts and Telecommunications,Beijing,100876,China

出　　处：《Nano Research》2020年第3期861-867,共7页纳米研究（英文版）

基　　金：This study was supported by the National Natural Science Foundation of China(Nos.51788104 and 51661135025);the National Basic Research Program of China(No.2015CB932500);China Postdoctoral Science Foundation(Nos.2018M640124 and 2019T120083).

摘　　要：Particulate matter(PM)pollution has become a serious problem worldwide and various kinds of nanofibrous filters aiming to solve the problem have been developed.It is urgent to remove PM from high-temperature pollution sources,such as industrial emissions,coal furnaces,and automobile exhaust gases.However,filtration at pollution sources remains challenging because most existing air filters are not resistant to high temperature.Herein,heat-resistant polyimide(PI)nanofibrous air filters are fabricated via a simple and scalable solution blow-spinning method.These air filters show excellent thermal stability at high temperature up to 420℃.They exhibit a filtration efficiency as high as 99.73%at ambient temperature and over 97%at 300℃.In addition,a field test shows that the filters remove>97%of PM from the car exhaust fumes.Hence,the blow-spun PI nanofibrous membranes combined with the facile preparation strategy have great potential in high temperature air filtration fields and other similar applications such as water purification and protein separation.

关 键 词：air filters HEAT-RESISTANT blow spinning NANOFIBERS 

分 类 号：TB383[一般工业技术—材料科学与工程]