期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 29, 页码 34773-34781出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c04253
关键词
ultrafine nanofiber; polyamide; blow spinning; air filtration; personal protective equipment
资金
- Ministry of Science and Technology of the People's Republic of China (National Key Research and Development Project) [2017YFB0406300]
- Shenzhen Fundamental Research Program [JCYJ20190813171603633, JCYJ20170412171554022]
Ultrathin and -light nanofibrous filters with excellent filtration properties have been developed to efficiently prevent 0.3 μm particulate matter, exhibiting filtration efficiency ranging from 98.75% to 99.99% and pressure drops of 125.44 Pa to 0.9 g m(-2) areal density. They have the potential to be widely used in personal protective equipment, industrial waste gas treatment, and purification systems.
Particulate matter of 0.3 pm in diameter (PM0.3) poses a serious threat to the environment and human beings. Ultrathin and -light nanofibrous filters with excellent filtration properties can significantly prevent the detrimental effects of these particles. Here, we develop free-standing polyamide PA-66 ultrafine nanofiber papers for PM0.3 filtration using effective and scalable blow and electro-blow spinning techniques. The smallest average fiber diameter is 61.7 nm, which is 2-3 orders of magnitude smaller than that of conventional textiles. Poly(ethylene terephthalate) nonwovens are selected to fabricate free-standing nanofiber papers of various polymers, including polyamide, poly(methyl methacrylate), poly(vinylpyrrolidone), and poly(ethylene oxide) owing to the smooth surfaces of the nonwovens. This underlying principle can be used to create similar free-standing nanofiber papers from other commodity polymers in the future. Mechanisms of capturing particulate matter with different nanofiber morphologies are discussed. Salt and oil particulates are used to characterize the filtration properties. PA-66 papers are promising reusable filters owing to their mechanical particle-capture mechanism. The blow-spun PA-66 papers show filtration performance of 98.75% efficiency and a pressure drop of 125.44 Pa owing to the slip effect caused by the ultrasmall diameter. In the electro-blow spinning process, a supplementary voltage supply is conducive to separating nanofiber bundles into random-oriented nanofibers. Electro-blown spun papers possess an ultrahigh efficiency of 99.99% with a reduced areal density of 0.9 g m(-2). These PA-66 papers can be used in a variety of applications, such as reusable personal protective equipment, industrial waste gas treatment, and central ventilation purification systems.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据