Dataset Information

Slip-Effect Functional Air Filter for Efficient Purification of PM_2.5.

ABSTRACT: Fabrication of air filtration materials (AFM) that allow air to easily flow through while retaining particles is a significant and urgent need due to the harmful airborne particulate matter pollution; however, this is still a challenging research area. Herein, we report novel slip-effect functional nanofibrous membranes with decreased air resistance (reduction rate of 40%) due to the slip flow of air molecules on the periphery of nanofibers. This was achieved through careful control over the diameters of electrospun polyacrylonitrile fibers and aperture size of fiber assembly. Fiber assembly with 86% of fiber diameters between 60-100?nm was found to be most effective for slip flow, as these diameters are close to the mean free path of air molecules (65.3?nm). Significantly, an equilibrium factor ??=?d_f/d² has been introduced to elucidate the effect of distance of adjacent fibers on the drag force of airflow. Furthermore, the most effective aperture size (>3.5??m) for slip-effect has been determined. Ultimately, the new material displayed low air resistance of 29.5?Pa, high purification efficiency of 99.09%, good transmittance of 77%, and long service life. The successful fabrication of such materials can facilitate the development of high-performance AFMs for various applications.

SUBMITTER: Zhao X

PROVIDER: S-EPMC5066256 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature

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Slip-Effect Functional Air Filter for Efficient Purification of PM<sub>2.5</sub>.

Zhao Xinglei X Wang Shan S Yin Xia X Yu Jianyong J Ding Bin B

Scientific reports 20161017

Fabrication of air filtration materials (AFM) that allow air to easily flow through while retaining particles is a significant and urgent need due to the harmful airborne particulate matter pollution; however, this is still a challenging research area. Herein, we report novel slip-effect functional nanofibrous membranes with decreased air resistance (reduction rate of 40%) due to the slip flow of air molecules on the periphery of nanofibers. This was achieved through careful control over the dia ...[more]

PMID: 27748419

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Project description:Rapid urbanization and consuming lifestyles have intensified air pollution in urban areas. Air pollution in megacities has imposed severe environmental damages to human health. Proper management of the issue necessitates identification of the share of emission sources. Therefore, numerous research works have studied the apportionment of the total emissions and observed concentrations among different emissions sources. In this research, a comprehensive review is conducted to compare the source apportioning results for ambient air PM2.5 in the megacity of Tehran, the capital of Iran. One hundred seventy-seven pieces of scientific literatures, published between 2005 and 2021, were reviewed. The reviewed research are categorized according to the source apportioning methods: emission inventory (EI), source apportionment (SA), and sensitivity analysis of the concentration to the emission sources (SNA). The possible reasons for inconsistency among the results are discussed according to the scope of the studies and the implemented methods. Although 85% of the reviewed original estimates identify that mobile sources contribute to more thant 60% of Tehran air pollution, the distribution of vehicle types and modes are clearly inconsistent among the EI studies. Our review suggests that consistent results in the SA studies in different locations in central Tehran may indicate the reliability of this method for the identification of the type and share of the emission sources. In contrast, differences among the geographical and sectoral coverage of the EI studies and the disparities among the emission factors and activity data have caused significant deviations among the reviewed EI studies. Also, it is shown that the results of the SNA studies are highly dependent on the categorization type, model capabilities and EI presumptions and data input to the pollutant dispersion modelings. As a result, integrated source apportioning in which the three methods complement each other's results is necessary for consistent air pollution management in megacities.Supplementary informationThe online version contains supplementary material available at 10.1007/s40201-023-00855-0.

Dataset Information

Slip-Effect Functional Air Filter for Efficient Purification of PM_2.5.

Publications

Slip-Effect Functional Air Filter for Efficient Purification of PM<sub>2.5</sub>.

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Dataset Information

Slip-Effect Functional Air Filter for Efficient Purification of PM2.5.

Publications

Slip-Effect Functional Air Filter for Efficient Purification of PM<sub>2.5</sub>.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

Slip-Effect Functional Air Filter for Efficient Purification of PM_2.5.