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Article

Carrier Fibers for the Safe Dosage of Nanoparticles in Nanocomposites: Nanomechanical and Thermomechanical Study on Polycarbonate/Boehmite Electrospun Fibers Embedded in Epoxy Resin

1
Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany
2
Department of Mechanical Engineering and Transport Systems, Technical University of Berlin, 10587 Berlin, Germany
3
Faculty of Engineering, Instituto Tecnológico Metropolitano (ITM), Cra. 54A #30-01, Medellín 050013, Colombia
*
Author to whom correspondence should be addressed.
Academic Editors: Mauro Zarrelli and Anna Borriello
Nanomaterials 2021, 11(6), 1591; https://doi.org/10.3390/nano11061591
Received: 20 May 2021 / Revised: 13 June 2021 / Accepted: 14 June 2021 / Published: 17 June 2021
(This article belongs to the Special Issue Advanced Materials for Aerospace: Polymer Nanocomposites)
The reinforcing effect of boehmite nanoparticles (BNP) in epoxy resins for fiber composite lightweight construction is related to the formation of a soft but bound interphase between filler and polymer. The interphase is able to dissipate crack propagation energy and consequently increases the fracture toughness of the epoxy resin. Usually, the nanoparticles are dispersed in the resin and then mixed with the hardener to form an applicable mixture to impregnate the fibers. If one wishes to locally increase the fracture toughness at particularly stressed positions of the fiber-reinforced polymer composites (FRPC), this could be done by spraying nanoparticles from a suspension. However, this would entail high costs for removing the nanoparticles from the ambient air. We propose that a fiber fleece containing bound nanoparticles be inserted at exposed locations. For the present proof-of-concept study, an electrospun polycarbonate nonwoven and taurine modified BNP are proposed. After fabrication of suitable PC/EP/BNP composites, the thermomechanical properties were tested by dynamic mechanical analysis (DMA). Comparatively, the local nanomechanical properties such as stiffness and elastic modulus were determined by atomic force microscopy (AFM). An additional investigation of the distribution of the nanoparticles in the epoxy matrix, which is a prerequisite for an effective nanocomposite, is carried out by scanning electron microscopy in transmission mode (TSEM). From the results it can be concluded that the concept of carrier fibers for nanoparticles is viable. View Full-Text
Keywords: electrospun nanocomposite fiber; nanomechanical characterization; epoxy nanocomposites electrospun nanocomposite fiber; nanomechanical characterization; epoxy nanocomposites
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MDPI and ACS Style

Cano Murillo, N.; Ghasem Zadeh Khorasani, M.; Silbernagl, D.; Emamverdi, F.; Cacua, K.; Hodoroaba, V.-D.; Sturm, H. Carrier Fibers for the Safe Dosage of Nanoparticles in Nanocomposites: Nanomechanical and Thermomechanical Study on Polycarbonate/Boehmite Electrospun Fibers Embedded in Epoxy Resin. Nanomaterials 2021, 11, 1591. https://doi.org/10.3390/nano11061591

AMA Style

Cano Murillo N, Ghasem Zadeh Khorasani M, Silbernagl D, Emamverdi F, Cacua K, Hodoroaba V-D, Sturm H. Carrier Fibers for the Safe Dosage of Nanoparticles in Nanocomposites: Nanomechanical and Thermomechanical Study on Polycarbonate/Boehmite Electrospun Fibers Embedded in Epoxy Resin. Nanomaterials. 2021; 11(6):1591. https://doi.org/10.3390/nano11061591

Chicago/Turabian Style

Cano Murillo, Natalia, Media Ghasem Zadeh Khorasani, Dorothee Silbernagl, Farnaz Emamverdi, Karen Cacua, Vasile-Dan Hodoroaba, and Heinz Sturm. 2021. "Carrier Fibers for the Safe Dosage of Nanoparticles in Nanocomposites: Nanomechanical and Thermomechanical Study on Polycarbonate/Boehmite Electrospun Fibers Embedded in Epoxy Resin" Nanomaterials 11, no. 6: 1591. https://doi.org/10.3390/nano11061591

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