A Facile Preparation of Flexible Alumina/Carbon Composite Nanofibers Film

E-ISSN： 1661-9897|2015|35|115-127

ISSN： 1662-5250

Source： Journal of Nano Research, Vol.2015, Iss.35, 2015-11, pp. : 115-127

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Abstract

Flexible alumina (Al₂O₃)/carbon (C) composite nanofibers film has been fabricated via electrospinning, followed by pre-oxidation and carbonization. Polyacrylonitrile (PAN)/Polyvinylpyrrolidone (PVP) and aluminum hydroxyacetate (Al(OH)C₄H₆O₄) acted as carbon precursor and Al₂O₃ precursor, respectively. The obtained Al₂O₃/C nanofibers films were systematically characterized by field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), Fourier transform infrared spectra (FTIR), energy dispersive spectrometer (EDS), X-ray diffractometer (XRD) and flexural tests. The results indicated that Al₂O₃/C composite nanofibers with rough surface consisted of graphitic phase and γ-Al₂O₃ phase. The Al₂O₃ covering on the surface of nanofibers improved the flexibility of carbon nanofibers (CNFs) film. Moreover, with the amount of Al₂O₃ increasing, both flexural rigidity and flexural modulus of Al₂O₃/C nanofibers film decreased drastically. In the other words, the flexibility of CNFs film improved greatly. The Al₂O₃/C nanofibers film with the mass ratio of Al(OH)C₄H₆O₄: PAN being 4:1 exhibited flexural modulus that was about 11 times lower than that of CNFs film without Al₂O₃, suggesting that the highly flexible Al₂O₃/C nanofibers film was obtained.