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Original title:
The role of sonication of polyethyleneoxide solutions containing magnetic nanoparticles on morphology of nanofibrous mats
Authors: Peer, Petra ; Stěnička, M. ; Filip, Petr ; Pizúrová, Naděžda ; Babayan, V.
Document type: Papers
Conference/Event: International Conference on Nanomaterials - Research & Application /8./, Brno (CZ), 20161019
Year: 2017
Language: eng
Abstract: Properties of the resulting polymer nanofibers are often tailored by sonication technique applied prior or past an electrospinning process. The aim of this contribution is to evaluate morphology of nanofibrous mats formed by poly(ethylene oxide) with distributed magnetic nanoparticles (MNP) (about 20 nm in diameter) in dependence on time of sonication of the used polymer solutions. The solutions were exposed to sonication (intensity 200W, frequency 24 kHz) for 10, 30, and 60 minutes. It was shown that rheological characteristics (viscosity, storage and loss moduli) strongly depend on time of sonication (particularly phase angle) in contrast to electric conductivity and surface tension. For analysis of homogeneous distribution of MNP in polymer solution, the rheological measurements were carried out also in presence of external magnetic field. Magnetorheological efficiency (a relation of corresponding viscosities) was determined for 80, 170, and 255 mT. Consequently, changed rheological characteristics participate significantly in the process of electrospinning and resulting quality of the obtained nanofibrous mats. Qualitative changes were described by\nmeans of scanning electron microscopy (variance of mean diameter of nanofibers), transmission electron microscopy (distribution of MNP within nanofibrous mats). Static magnetic properties were determined by a vibration sample magnetometer. It was shown that even distribution of MNP in the mats can be achieved by mere sonication process without application of external magnetic field during an electrospinning process. However, time of sonication generates a degree of embedding of MNP into individual nanofibers.
Keywords: electrospinning; magnetic nanoparticles; magnetorheology; poly(ethylene oxide); ultrasound
Project no.: ED2.1.00/03.0111
Funding provider: GA MŠk
Host item entry: NANOCON 2016 8th International Conference on Nanomaterials - Research & Application. Conference proceedings, ISBN 978-80-87294-71-0
Note: Související webová stránka: https://www.confer.cz/nanocon/2016/410-the-role-of-sonication-of-peo-solutions-with-magnetic-nanoparticles-on-morphology-of-the-resulting-nanofibrous-mats
Institution: Institute of Hydrodynamics AS ČR (web)
Document availability information: Fulltext is available on demand via the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0271266
Permalink: http://www.nusl.cz/ntk/nusl-295595
The record appears in these collections:
Research > Institutes ASCR > Institute of Hydrodynamics
Conference materials > Papers
Authors: Peer, Petra ; Stěnička, M. ; Filip, Petr ; Pizúrová, Naděžda ; Babayan, V.
Document type: Papers
Conference/Event: International Conference on Nanomaterials - Research & Application /8./, Brno (CZ), 20161019
Year: 2017
Language: eng
Abstract: Properties of the resulting polymer nanofibers are often tailored by sonication technique applied prior or past an electrospinning process. The aim of this contribution is to evaluate morphology of nanofibrous mats formed by poly(ethylene oxide) with distributed magnetic nanoparticles (MNP) (about 20 nm in diameter) in dependence on time of sonication of the used polymer solutions. The solutions were exposed to sonication (intensity 200W, frequency 24 kHz) for 10, 30, and 60 minutes. It was shown that rheological characteristics (viscosity, storage and loss moduli) strongly depend on time of sonication (particularly phase angle) in contrast to electric conductivity and surface tension. For analysis of homogeneous distribution of MNP in polymer solution, the rheological measurements were carried out also in presence of external magnetic field. Magnetorheological efficiency (a relation of corresponding viscosities) was determined for 80, 170, and 255 mT. Consequently, changed rheological characteristics participate significantly in the process of electrospinning and resulting quality of the obtained nanofibrous mats. Qualitative changes were described by\nmeans of scanning electron microscopy (variance of mean diameter of nanofibers), transmission electron microscopy (distribution of MNP within nanofibrous mats). Static magnetic properties were determined by a vibration sample magnetometer. It was shown that even distribution of MNP in the mats can be achieved by mere sonication process without application of external magnetic field during an electrospinning process. However, time of sonication generates a degree of embedding of MNP into individual nanofibers.
Keywords: electrospinning; magnetic nanoparticles; magnetorheology; poly(ethylene oxide); ultrasound
Project no.: ED2.1.00/03.0111
Funding provider: GA MŠk
Host item entry: NANOCON 2016 8th International Conference on Nanomaterials - Research & Application. Conference proceedings, ISBN 978-80-87294-71-0
Note: Související webová stránka: https://www.confer.cz/nanocon/2016/410-the-role-of-sonication-of-peo-solutions-with-magnetic-nanoparticles-on-morphology-of-the-resulting-nanofibrous-mats
Institution: Institute of Hydrodynamics AS ČR (web)
Document availability information: Fulltext is available on demand via the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0271266
Permalink: http://www.nusl.cz/ntk/nusl-295595
The record appears in these collections:
Research > Institutes ASCR > Institute of Hydrodynamics
Conference materials > Papers
Record created 2017-04-28, last modified 2023-12-06