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Large-scale blow spinning of heat-resistant nanofibrous air filters
Nano Research ( IF 9.9 ) Pub Date : 2020-03-09 , DOI: 10.1007/s12274-020-2708-x
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

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.



中文翻译:

耐热纳米纤维空气过滤器的大规模吹纺

摘要

颗粒物(PM)污染已成为世界范围内的严重问题,并且已经开发了旨在解决该问题的各种纳米纤维过滤器。迫切需要从工业排放物,煤炉和汽车尾气等高温污染源中去除PM。然而,由于大多数现有的空气过滤器不耐高温,因此在污染源处进行过滤仍然具有挑战性。在此,通过简单且可扩展的溶液吹纺方法来制造耐热性聚酰亚胺(PI)纳米纤维空气过滤器。这些空气过滤器在高达420°C的高温下显示出出色的热稳定性。它们在环境温度下的过滤效率高达99.73%,在300°C下的过滤效率超过97%。此外,现场测试表明,过滤器从汽车尾气中去除了97%以上的PM。

更新日期:2020-03-10
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