The influence of rheological changes during sonication of poly(ethylene oxide) solutions containing magnetic nanoparticles on morphology of nanofibrous mats

0487316 - ÚH 2018 RIV DK eng C - Conference Paper (international conference)
Filip, Petr - Peer, Petra
The influence of rheological changes during sonication of poly(ethylene oxide) solutions containing magnetic nanoparticles on morphology of nanofibrous mats.
11th Annual European Rheology Conference. Book of Abstracts. Copenhagen: Nordic Rheology Society, 2017, s. 9, č. článku SG4. ISSN N.
[Annual European Rheology Conference AERC 2017 and 26th Nordic Rheology Conference /11./. Copenhagen (DK), 03.04.2017-06.04.2017]
R&D Projects: GA ČR GA17-26808S
Institutional support: RVO:67985874
Keywords : nanofibrous mats * nanoparticles * PEO * poly(ethylene oxide)
OECD category: Polymer science

Morphology of nanofibrous mats formed by poly(ethylene oxide) (PEO) with distributed magnetic nanoparticles (about 20 nm in diameter) was evaluated in dependence on time of sonication of the initial polymer solutions (PEO dissolved in distilled water). The solutions were exposed to sonication (intensity 200 W, frequency 24 kHz) for 10, 30, and 60 minutes. In contrast to electric conductivity and surface tension, rheological characteristics (viscosity, storage and loss moduli) strongly depend on time of sonication (particularly phase angle). The rheological measurements were carried out also in presence of external magnetic field with the aim to analyse homogeneous distribution of magnetic nanoparticles in polymer solution. Magnetorheological efficiency (a relation of corresponding viscosities) was determined for 80, 170, and 255 mT. Consequently, it was shown that changed rheological characteristics participate significantly in the process of electrospinning and resulting quality of the obtained nanofibrous mats.
Permanent Link: http://hdl.handle.net/11104/0281967