The role of sonication of polyethyleneoxide solutions containing magnetic nanoparticles on morphology of nanofibrous mats

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F17%3A00474159" target="_blank" >RIV/67985874:_____/17:00474159 - isvavai.cz</a>

Alternative codes found

RIV/68081723:_____/17:00474159 RIV/70883521:28110/17:63516987 RIV/70883521:28610/17:63516987

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

The role of sonication of polyethyleneoxide solutions containing magnetic nanoparticles on morphology of nanofibrous mats

Original language description

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 bynmeans 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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10404 - Polymer science

Project

<a href="/en/project/ED2.1.00%2F03.0111" target="_blank" >ED2.1.00/03.0111: Centre of Polymer Systems</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

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

Article name in the collection

NANOCON 2016 8th International Conference on Nanomaterials - Research & Application. Conference proceedings

ISBN

978-80-87294-71-0

ISSN

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e-ISSN

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Number of pages

5

Pages from-to

20-24

Publisher name

TANGER Ltd.

Place of publication

Ostrava

Event location

Brno

Event date

Oct 19, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000410656100002