Minimum concentration of poly(ethylene oxide) in water solution ensuring good quality of electrospun nanofibres

0504046 - ÚH 2020 RIV SI eng A - Abstrakt
Zelenková, Jana - Peer, Petra - Filip, Petr
Minimum concentration of poly(ethylene oxide) in water solution ensuring good quality of electrospun nanofibres.
AERC 2019. 13th Annual European Rheology Conference. Book of Abstracts.. Portorož: European Society of Rheology, 2019. s. 71.
[Annual European Rheology Conference AERC /13./. 08.04.2019-11.04.2019, Portorož]
Grant CEP: GA ČR GA17-26808S
Institucionální podpora: RVO:67985874
Klíčová slova: polyethyleneoxide * nanofibres * electrospinning * specific viscosity
Obor OECD: Fluids and plasma physics (including surface physics)

Successful electrospinning of polymer solutions is limited among other parameters by a range of concentration of the polymer used in a solvent. Too low concentration indicates minimum of contacts between the individual macromolecules and hence, no possibility to create nanofibres. The question is how to estimate the lowest value of concentration for specific materials above which the nanofibrous mat can be obtained (under otherwise fixed other parameters such as the process ones). One of the indications is given by a course of specific viscosity. For a solution of poly(ethylene oxide) in water we can approximate dependence of the specific viscosity on concentration by two or three linear segments depending whether log-log or semi-log coordinates are used. The points of line refraction have a correspondence with an existence and quality of electrospun nanofibres as will be demonstrated.
Trvalý link: http://hdl.handle.net/11104/0295767