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000892272 020__ $$a978-3-95806-538-3
000892272 037__ $$aFZJ-2021-01992
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000892272 1001_ $$0P:(DE-Juel1)169361$$aFruhner, Lisa Sarah$$b0$$eCorresponding author$$gfemale$$ufzj
000892272 245__ $$aTowards Magneto-Elastomeric Nanocomposites with Supramolecular Activity$$f- 2021-05-27
000892272 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2021
000892272 300__ $$aXVI, 213 S.
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000892272 4900_ $$aSchriften des Forschungszentrums Jülich. Reihe Schlüsseltechnologien / Key Technologies$$v234
000892272 502__ $$aRWTH Aachen, Diss., 2020$$bDissertation$$cRWTH Aachen$$d2020
000892272 520__ $$aCombining 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. [...]
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