Title: Exploration of ultralight nanofiber aerogels as particle filters : capacity and efficiency
Authors : Deuber, Fabian
Mousavi, Sara
Federer, Lukas
Hofer, Marco
Adlhart, Christian
Published in : ACS Applied Materials & Interfaces
Volume(Issue) : 10
Issue : 10
Pages : 9069
Pages to: 9076
Publisher / Ed. Institution : American Chemical Society
Issue Date: 2018
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : Aerosol filtration; Deep-bed filtration; Electrospinning; Particle diffusion; Sponge
Subject (DDC) : 540: Chemistry
620.11: Engineering materials
Abstract: Ultralight nanofiber aerogels (NFAs) or nanofiber sponges are a truly three-dimensional derivative of the intrinsically flat electrospun nanofiber mats or membranes (NFMs). Here we investigated the potential of such materials for particle or aerosol filtration because particle filtration is a major application of NFMs. Ultralight NFAs were synthesized from electrospun nanofibers using a solid-templating technique. These materials had a tunable hierarchical cellular open-pore structure. We observed high filtration efficiencies of up to 99.999% at the most penetrating particle size. By tailoring the porosity of the NFAs through the processing parameters, we were able to adjust the number of permeated particles by a factor of 1000 and the pressure drop by a factor of 9. These NFAs acted as a deep-bed filter, and they were capable of handling high dust loadings without any indication of performance loss or an increase in the pressure drop. When the face velocity was increased from 0.75 to 6 cm s-1, the filtration efficiency remained high within a factor of 1.1-10. Both characteristics were in contrast to the behavior of two commercial NFM particle filters, which showed significant increases in the pressure drop with the filtration time as well as a susceptibility against high face velocities by a factor of 105.
Departement: Life Sciences und Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Publication type: Article in scientific Journal
DOI : 10.1021/acsami.8b00455
ISSN: 1944-8244
1944-8252
URI: https://digitalcollection.zhaw.ch/handle/11475/3426
Appears in Collections:Publikationen Life Sciences und Facility Management

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