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

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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。


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

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


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