Electrospun Magnetic Nanoparticle-Decorated Nanofiber Filter and Its Applications to High-Efficiency Air Filtration,Environmental Science & Technology

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Electrospun Magnetic Nanoparticle-Decorated Nanofiber Filter and Its Applications to High-Efficiency Air Filtration
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2017-10-04 00:00:00 , DOI: 10.1021/acs.est.7b02884
Juyoung Kim _{1,

2} , Seung Chan Hong ₃ , Gwi Nam Bae ₁ , Jae Hee Jung _{1,

4,

5}

Affiliation

Filtration technology has been widely studied due to concerns about exposure to airborne dust, including metal oxide nanoparticles, which cause serious health problems. The aim of these studies has been to develop mechanisms for the continuous and efficient removal of metal oxide dusts. In this study, we introduce a novel air filtration system based on the magnetic attraction force. The filtration system is composed of a magnetic nanoparticle (MNP)-decorated nanofiber (MNP-NF) filter. Using a simple electrospinning system, we fabricated continuous and smooth electrospun nanofibers with evenly distributed Fe₃O₄ MNPs. Our electrospun MNP-NF filter exhibited high particle collection efficiency (∼97% at 300 nm particle size) compared to the control filter (w/o MNPs, ∼ 68%), with a ∼ 64% lower pressure drop (∼17 Pa) than the control filter (∼27 Pa). Finally, the filter quality factors of the MNP-NF filter were 4.7 and 11.9 times larger than those of the control filter and the conventional high-efficiency particulate air filters (>99% and ∼269 Pa), respectively. Furthermore, we successfully performed a field test of our MNP-NF filter using dust from a subway station tunnel. This work suggests that our novel MNP-NF filter can be used to facilitate effective protection against hazardous metal oxide dust in real environments.

中文翻译：

静电纺丝修饰纳米纤维的纳米纤维过滤器及其在高效空气过滤中的应用

由于担心暴露于空气中的灰尘（包括金属氧化物纳米颗粒）会引起严重的健康问题，因此对过滤技术进行了广泛的研究。这些研究的目的是开发连续有效去除金属氧化物粉尘的机理。在这项研究中，我们介绍了一种基于磁性吸引力的新型空气过滤系统。过滤系统由装饰有磁性纳米颗粒（MNP）的纳米纤维（MNP-NF）过滤器组成。使用简单的静电纺丝系统，我们制备了具有均匀分布的Fe ₃ O _4的连续且光滑的电纺纳米纤维MNP。我们的电纺MNP-NF过滤器与对照过滤器相比（无MNP，约68％）表现出较高的颗粒收集效率（在300 nm粒径下约为97％），压降降低了约64％（约17 Pa）比控制过滤器（约27 Pa）大。最后，MNP-NF过滤器的过滤器品质因数分别是对照过滤器和常规高效颗粒空气过滤器（> 99％和〜269 Pa）的4.7和11.9倍。此外，我们使用地铁站隧道中的灰尘成功地对MNP-NF过滤器进行了现场测试。这项工作表明，我们的新型MNP-NF过滤器可用于在实际环境中促进有效防护有害金属氧化物粉尘的方法。

更新日期：2017-10-04

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