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Research Article

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

Ziwei Li1,§, Jianan Song1,§, Yuanzheng Long1, Chao Jia1, Zhenglian Liu2, Lei Li1, Cheng Yang1, Junchen Liu3, Sen Lin3, Haiyang Wang1, Yibo Liu1, Minghao Fang2, Hui Wu1( )
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
State Key Laboratory of Information Photonics and Optical Communications and School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China

§ Ziwei Li and Jianan Song contributed equally to this work.

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Abstract

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 °C. They exhibit a filtration efficiency as high as 99.73% at ambient temperature and over 97% at 300 °C. 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.

Keywords

air filtersheat-resistantblow spinningnanofibers

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Nano Research
Volume 13 Issue 3,
March 2020
Pages 861-867
DOI: 10.1007/s12274-020-2708-x
Cite this article:
Li Z, Song J, Long Y, et al. Large-scale blow spinning of heat-resistant nanofibrous air filters. Nano Research, 2020, 13(3): 861-867. https://doi.org/10.1007/s12274-020-2708-x
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Received: 22 December 2019
Revised: 07 February 2020
Accepted: 10 February 2020
Published: 09 March 2020
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020
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