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@PHDTHESIS{Fruhner:892272,
author = {Fruhner, Lisa Sarah},
title = {{T}owards {M}agneto-{E}lastomeric {N}anocomposites with
{S}upramolecular {A}ctivity},
volume = {234},
school = {RWTH Aachen},
type = {Dissertation},
address = {Jülich},
publisher = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
reportid = {FZJ-2021-01992},
isbn = {978-3-95806-538-3},
series = {Schriften des Forschungszentrums Jülich. Reihe
Schlüsseltechnologien / Key Technologies},
pages = {XVI, 213 S.},
year = {2021},
note = {RWTH Aachen, Diss., 2020},
abstract = {Combining the functionality of nanoparticles and polymers
leads to a novel class of materials: nanocomposites.
Nanoparticles like magnetic nanoparticles or quantum dots
(QDs) can be used to introduce new properties into polymeric
matrices. This could be the response to a magnetic field or
photoluminescence. Polymers can provide stability, add
elasticity or animproved processability, they can be
functionalised by supramolecular groups to allow
nonpermanent bonds between the polymer chains. The
combination of those properties makes nanocomposites deeply
interesting for a range of applications like coatings,
membranes, organic solar cells or biomedicine. The
additional structuring of nanoparticles within the polymer
matrix allows for an even wider range of tuneable
properties. Obtaining stable nanocomposites in external
fields is highly desirable but challenging due to the
usually encountered aggregation of nanoparticles in polymer
matrices. Therefore, compatibilization of the two components
is essential to study their controlled spatial organisation.
The aim of this work is the development of a route towards
magneto-elastomeric nanocomposites with supramolecular
activity. For this, functional nanocomposites are
synthesised, and their structure characterised by
small-angle scattering methods. First, the behaviour of
superparamagnetic, oleic acid stabilised iron oxide
nanoparticles, in a magnetic field is investigated by
small-angle neutron scattering (SANS). It is found that
already at low magnetic fields, the nanoparticles form
chains, which are aligned parallel to the magnetic field
while crystalline phases dominate the measured structures at
higher field strengths. To be able to make use of this
behaviour in a nanocomposite, a compatibilization of the
nanoparticles and the polymer matrix is necessary. The
solution developed here, relies on the coating of the
nanoparticles with a polymer shell. [...]},
cin = {JCNS-1 / IBI-8},
cid = {I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)IBI-8-20200312},
pnm = {899 - ohne Topic (POF4-899)},
pid = {G:(DE-HGF)POF4-899},
typ = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
urn = {urn:nbn:de:0001-2021052757},
url = {https://juser.fz-juelich.de/record/892272},
}