< img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=1255321878683608&ev=PageView&noscript=1" />

Hierarchical electrospun nanofibers treated by solvent vapor annealing as air filtration mat for high-efficiency PM2.5 capture

Views: 574 Author: Site Editor Publish Time: Origin: Site

Recently, air pollution has become more serious and started to have a dramatic effect on the health of humans in many large cities. Generally, outdoor personal protection, such as commercial masks, cannot effectively prevent the inhalation of many pollutants. Particulate matter (PM) pollutants are a particularly serious threat to human health. Here we introduce a new efficient air filtration mat that can be used for outdoor protection. The new efficient air filter's nanocomposite materials were successfully fabricated from poly(epsilon-caprolactone)/polyethylene oxide (PCL/PEO) using an electrospinning technique and solvent vapor annealing (SVA). SVA treatment endows the wrinkled fiber surface and enhances the PM2.5 capture capacity of protective masks. This nanowrinkled air filtration mat can effectively filter PM2.5 with a removal efficiency of 80.01% under seriously polluted conditions (PM2.5 particle concentration above 225 mgm(-3)). Our field test in Qinhuangdao indicated that the air filtration mat had a high PM2.5 removal efficiency under thick haze. Compared to commercial masks, the fabricated SVA-treated PCL/PEO air filter mat demonstrated a simpler and ecofriendly preparation process with excellent degradation characteristics, showing wide potential applications with a high filtration efficiency.

最近,空气污染已经变得更加严重,并开始对许多大城市的人类健康产生巨大影响。通常,户外个人防护用品,例如商业口罩,不能有效地防止许多污染物的吸入。颗粒物(PM)污染物是对人类健康的特别严重的威胁。在这里,我们介绍了一种新型的高效空气过滤垫,可用于户外防护。新型高效空气过滤器的纳米复合材料是使用电纺丝技术和溶剂蒸汽退火(SVA)成功地由聚(ε-己内酯)/聚环氧乙烷(PCL / PEO)制成的。 SVA处理赋予纤维表面起皱的作用,并增强了防护口罩的PM2.5捕获能力。这种纳米皱纹的空气过滤垫可以在严重污染的条件下(PM2.5颗粒浓度高于225 mgm(-3))以80.01%的去除率有效过滤PM2.5。我们在秦皇岛进行的现场测试表明,空气过滤垫在浓雾下具有较高的PM2.5去除效率。与商用口罩相比,制造的经过SVA处理的PCL / PEO空气滤垫具有更简单,更环保的制备工艺,并具有出色的降解特性,具有广阔的潜在应用前景,且过滤效率高。


Hierarchical electrospun nanofibers treated by solvent vapor annealing as air filtration mat for high-efficiency PM2.5 capture

Published: 2019

Journal :SCIENCE CHINA-MATERIALS

Impact Factor:6.098

Paper link: https://link.springer.com/content/pdf/10.1007/s40843-018-9320-4.pdf


×

Contact Us

captcha