Spinnability of PEO solutions with respect to their aging

0398350 - ÚH 2014 RIV CZ eng K - Konferenční příspěvek (tuzemská konf.)
Zelenková, Jana - Peer, Petra - Filip, Petr
Spinnability of PEO solutions with respect to their aging.
NANOCON 2013. 5th International Conference Proceedings. Ostrava: TANGER Ltd, 2013. ISBN 978-80-87294-44-4.
[NANOCON 2013. International Conference /5./. Brno (CZ), 16.10.2013-18.10.2013]
Grant CEP: GA ČR(CZ) GAP105/11/2342
Institucionální podpora: RVO:67985874
Klíčová slova: polyethylene oxide (PEO) * ageing * electrospinning * rheological properties
Obor OECD: Fluids and plasma physics (including surface physics)
http://www.nanocon.eu/files/proceedings/14/reports/2126.pdf

Non - negligible portion of pol ymer commodity suffers from ageing that participates in sometimes significant changes of products attributes. Rheology represents a useful tool for a description of this process. The aim of this contribution is to evaluate possible ageing of PEO solution ( polyethylen e oxide ( M w =300,000 g/mol) dissolved in water at 10 wt.% concentration) based both on rheological characterization and on quality of electrospun fibres. Rheological measurements in steady shear and oscillatory modes were carried out using a rota tional rheometer MCR 501 (Anton Paar, Austria) equipped with the concentric cylinders geometry. The electrospinning measurements were executed with the help of a proposed laboratory device. The tip - to - collector distance attained 20 cm, applied voltage rang ed from 20 to 30 kV. The obtained electrospun fibres were analysed using a scanning electron microscope (VEGA 3, Tescan, Czech Republic). Both types of measurements were carried out in the period of several months during which the solution studied was plac ed in a dark and tempered box (25°C). The measurements indicate no ageing impact on rheological characteristics or quality of electrospun fibres. This guarantees more or less the identical quality of non - woven textiles prepared from PEO solutions regardles s of time period during which the solutions are deposited.
Trvalý link: http://hdl.handle.net/11104/0225836