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Polymer Bulletin https://doi.org/10.1007/s00289-019-02707-0 ORIGINAL PAPER Viscoelastic evaluation of epoxy nanocomposite based on carbon nanofiber obtained from electrospinning processing Juliana Bovi de Oliveira1 · Lília Müller Guerrini2 · Luíza dos Santos Conejo1 · Mirabel Cerqueira Rezende2 · Edson Cocchieri Botelho1 Received: 2 November 2018 / Revised: 15 January 2019 / Accepted: 8 February 2019 © Springer-Verlag GmbH Germany, part of Springer Nature 2019 Abstract In recent years, carbon nanofiber composites have attracted researchers worldwide to use in reinforcing nanofillers instead of traditional methods due mainly to their multifunctional properties. Carbon nanofibers promote good thermal conductiv- ity, high surface area, high chemical stability and good mechanical resistance when associated with epoxy resin, for example, being excellent candidates for the acquisi- tion of advanced composites. The production of blankets made of interconnected fibers with diameters of micrometers and nanometers can be obtained by the electro- spinning process using a polymer solution. This work has as main objective the pro- duction of carbon nanofibers, using as precursor the polyacrylonitrile (PAN) blanket obtained by the electrospinning process through polymer solution and subsequent carbonization aiming applications as reinforcement in polymer composites. The fib- ers obtained by the electrospinning technique and subsequently passed through the carbonization process were characterized by scanning electron microscopy (SEM), which showed a decrease in the size of the fibers after carbonization, and by Fou- rier transform infrared spectroscopy, where a chemical change in the structure of the PAN was observed after its carbonization. The nanocomposite of epoxy resin/ carbon nanofibers was characterized by dynamic mechanical analyses and thermo- mechanical analyses. The epoxy resin/carbon nanofiber composite presented a glass transition temperature (Tg) in the range from 108.9 to 135.5 °C and a linear thermal expansion coefficient within the range of 68 × 10−6/°C and 408 × 10−6/°C. Keywords Carbon nanofiber composite · Polyacrylonitrile · Electrospinning · Carbonization * Juliana Bovi de Oliveira juliana_bovi@hotmail.com Extended author information available on the last page of the article Vol.:(012134536789)PDF Image | Carbon nanofibers obtained from electrospinning process
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