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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F17%3A00487316" target="_blank" >RIV/67985874:_____/17:00487316 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GA17-26808S" target="_blank" >GA17-26808S: Charakterizace polymerních tavenin a roztoků pomocí konstitutivních modelů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů