Electrospun Polyacrylonitrile/beta-Cyclodextrin Composite Membranes for Simultaneous Air Filtration and Adsorption of Volatile Organic Compounds

Simultaneous capture of different air pollutants including aerosols and volatile organic compound (VOC) is demonstrated using composite polyacrylonitrile (PAN)/beta-cyclodextrin (beta-CD) nanofiber membrane. Aerosol filtration along with VOCs adsorption in one step remains a challenge due to differences in the physical and chemical properties of these air pollutants. PAN/beta-CD composite electrospun nanofiber membranes (ENMs) were produced with different concentrations of beta-CD. The surface modification of the composite ENM was confirmed by X-ray photoelectron spectroscopy (XPS), field emission-scanning electron microscopy (FE-SEM) and water contact angles. PAN/beta-CD composite ENMs showed excellent air filtration performance (>95% filtration efficiency with a relatively low pressure drop of 112 Pa). Formaldehyde (HCHO) adsorption was determined using a simple jar method and xylene adsorption by UV spectroscopy. HCHO and xylene adsorption found better by 66% and 73%, respectively, compared to pristine PAN ENM despite a reduction in fiber surface area. The composite ENMs were found to be nontoxic to human lung cell line, suggesting that it is a good candidate for respiratory filter media for simultaneous air filtration and VOC adsorption.

使用复合聚丙烯腈（PAN）/β-环糊精（β-CD）纳米纤维膜可同时捕获不同的空气污染物，包括气溶胶和挥发性有机化合物（VOC）。由于这些空气污染物的物理和化学特性存在差异，因此气溶胶过滤和VOC吸附一步一步仍是一项挑战。使用不同浓度的β-CD生产PAN /β-CD复合电纺纳米纤维膜（ENM）。通过X射线光电子能谱（XPS），场发射扫描电子显微镜（FE-SEM）和水接触角证实了复合材料ENM的表面改性。 PAN /β-CD复合ENMs表现出出色的空气过滤性能（> 95％的过滤效率，相对较低的112 Pa压降）。甲醛（HCHO）的吸附使用简单的广口瓶法测定，二甲苯的吸附通过UV光谱法测定。尽管纤维表面积有所减少，但与原始的PAN ENM相比，HCHO和二甲苯的吸附率分别提高了66％和73％。发现复合ENM对人肺细胞系无毒，这表明它是呼吸过滤介质同时进行空气过滤和VOC吸附的良好候选者。

Published: 2018

Journal ：ACS APPLIED NANO MATERIALS

Impact Factor：There is no data at this time

Paper link: https://pubs.acs.org/doi/abs/10.1021/acsanm.8b01056