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Titel: Induction heating induced self-healing of nanocomposites based on surface-functionalized cationic iron oxide particles and polyelectrolytes
VerfasserIn: Oberhausen, Bastian
Kickelbick, Guido
Sprache: Englisch
Titel: Nanoscale Advances
Bandnummer: 3
Heft: 19
Seiten: 5589–5604
Verlag/Plattform: Royal Society of Chemistry
Erscheinungsjahr: 2021
DDC-Sachgruppe: 500 Naturwissenschaften
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: Supramolecular interactions represent versatile, reversible, and intrinsic mechanisms for bond formation after the failure of materials. Ionic interactions excel through high flexibility and binding strength. In this study, ionic interactions between polymer matrices and inorganic nanoparticles were used to induce self-healing properties. Random, anionic polyelectrolyte copolymers consisting of di(ethylene glycol) methyl ether methacrylate and sodium-4-(methacryloyloxy)butan-1-sulfonate were synthesized by atom transfer radical polymerization. Differential scanning calorimetry measurements confirmed the adjustability of the glass transition temperature via the polymer composition. Within the glass transition temperature window of the homopolymers from 23 C to 126 C, the range between 18 C to 50 C was examined, generating suitable matrices for self-healing. Superparamagnetic iron oxide nanoparticles with a size of 8 nm were synthesized by thermal decomposition of iron(III) acetylacetonate and used as the inorganic filler. Positive surface charges were introduced by functionalization with N,N,N-trimethyl6-phosphonhexan-1-aminium bromide. Functionalization was confirmed with FTIR, TGA, and zeta potential measurements. Ionic interactions between filler and polymer promote a uniform particle dispersion within the material. Self-healing experiments were performed at 80 C and without the addition of further healing agents. Utilizing the magnetic properties induced by the iron oxide nanoparticles, spatially resolved healing within an alternating magnetic field was achieved on a mm scale.
DOI der Erstveröffentlichung: 10.1039/D1NA00417D
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-349840
hdl:20.500.11880/31975
http://dx.doi.org/10.22028/D291-34984
ISSN: 2516-0230
Datum des Eintrags: 10-Nov-2021
Bezeichnung des in Beziehung stehenden Objekts: Supplementary files
In Beziehung stehendes Objekt: https://www.rsc.org/suppdata/d1/na/d1na00417d/d1na00417d1.pdf?_ga=2.82220052.36947935.1636541029-1305800646.1636541028
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Chemie
Professur: NT - Prof. Dr. Guido Kickelbick
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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