Morphology of Nano and Micro Fiber Structures in Ultrafine Particles Filtration.

0485818 - ÚCHP 2018 RIV US eng C - Conference Paper (international conference)
Kimmer, D. - Vincent, I. - Fenyk, J. - Petráš, D. - Zatloukal, M. - Zatloukal, W. - Ždímal, Vladimír
Morphology of Nano and Micro Fiber Structures in Ultrafine Particles Filtration.
AIP Conference Proceedings, Volume 1375, Issue 1. Melville: American Institute of Physics, 2011 - (Zatloukal, M.), s. 295-311. ISBN 978-0-7354-0935-4.
[International Conference on Novel Trends in Rheology /4./. Zlín (CZ), 27.07.2011-28.07.2011]
Institutional support: RVO:67985858
Keywords : morphology optimization * nanofiber * beaded nanofiber
OECD category: Physical chemistry

Selected procedures permitting to prepare homogeneous nanofibre structures of the desired morphology by employing a suitable combination of variables during the electrospinning process are presented. A comparison (at the same pressure drop) was made of filtration capabilities of planar polyurethane nanostructures formed exclusively by nanofibres, space polycarbonate nanostructures having bead spacers, structures formed by a combination of polymethyl methacrylate micro-and nanofibres and polypropylene meltblown microstructures, through which ultrafine particles of ammonium sulphate 20 - 400 nm in size were filtered. The structures studied were described using a new digital image analysis technique based on black and white images obtained by scanning electron microscopy. More voluminous structures modified with distance microspheres and having a greater thickness and mass per square area of the material, i.e. structures possessing better mechanical properties, demanded so much in nanostructures, enable preparation of filters having approximately the same free volume fraction as flat nanofibre filters but an increased effective fibre surface area, changed pore size morphology and, consequently, a higher filter quality.
Permanent Link: http://hdl.handle.net/11104/0280759