Thermomechanical properties of confined magnetic nanoparticles in electrospun polyacrylonitrile nanofiber matrix exposed to a magnetic environment: structure, morphology, and stabilization (cyclization).

Autor: Sarac B; Erich Schmid Institute of Materials Science, Austrian Academy of Sciences 8700 Leoben Austria., Soprunyuk V; Faculty of Physics, Physics of Functional Materials, University of Vienna 1090 Vienna Austria wilfried.schranz@univie.ac.at., Herwig G; Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles 9014 St. Gallen Switzerland., Gümrükçü S; Department of Chemistry, Istanbul Technical University 34469 Istanbul Turkiye., Kaplan E; Department of Chemistry, Istanbul Technical University 34469 Istanbul Turkiye.; Faculty of Engineering, Doğuş University 34775 Istanbul Turkiye., Yüce E; Department of Materials Science, Montanuniversität Leoben 8700 Leoben Austria., Schranz W; Faculty of Physics, Physics of Functional Materials, University of Vienna 1090 Vienna Austria wilfried.schranz@univie.ac.at., Eckert J; Erich Schmid Institute of Materials Science, Austrian Academy of Sciences 8700 Leoben Austria.; Department of Materials Science, Montanuniversität Leoben 8700 Leoben Austria., Boesel LF; Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles 9014 St. Gallen Switzerland., Sarac AS; Polymer Science & Technology, Istanbul Technical University 34469 Istanbul Turkiye sarac@itu.edu.tr.
Jazyk: angličtina
Zdroj: Nanoscale advances [Nanoscale Adv] 2024 Sep 13. Date of Electronic Publication: 2024 Sep 13.
DOI: 10.1039/d4na00631c
Abstrakt: Electrospun metal oxide-polymer nanofiber composites hold promise for revolutionizing biomedical applications due to their unique combination of electronic and material properties and tailorable functionalities. An investigation into the incorporation of Fe-based nanofillers for optimizing the polyacrylonitrile matrix was conducted, where the systematic and organized arrangement of inorganic components was achieved through non-covalent bonding. These carefully dispersed nanomaterials exhibit the intrinsic electronic characteristics of the polymers and concurrently respond to external magnetic fields. Electrospinning was utilized to fabricate polyacrylonitrile nanofibers blended with Fe 2 O 3 and MnZn ferrite nanoparticles, which were thermomechanically, morphologically, and spectroscopically characterized in detail. With the application of an external magnetic field in the course of dynamic mechanical measurements under tension, the storage modulus of the glass transition T g of PAN/Fe 2 O 3 rises at the expense of the loss modulus, and a new peak emerges at ∼350 K. For the PAN/MnZn ferrite nanofibers a relatively larger shift in T g (from ∼367 K to ∼377 K) is observed, emphasizing that in comparison to Fe 2 O 3 , Mn 2+ ions in particular enhance the material's magnetic response in MnZn Ferrite. The magnetic oxide particles are homogenously dispersed in polyacrylonitrile, corroborated by high-resolution scanning electron microscopy. Both nanopowder additions lead to a slight shift of the peak towards larger angles, related to the shrinkage of the polymer. Produced nanofibers with high mechanical and heating efficiency can optimize the influence of the intracellular environment, magnetic refrigeration systems and sensors/actuators by their magnetic behavior and heat generation.
Competing Interests: There are no conflicts to declare.
(This journal is © The Royal Society of Chemistry.)
Databáze: MEDLINE
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