作者： Shruti Mahadik , Clarissa Wisner , Anand Sadekar , Abhishek Bang , Massimo Bertino
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摘要: Bundles of carbon microrods similar to those observed in some natural graphites were" grown" by pyrolysis of polyacrylonitrile(PAN) aerogels. The latter were synthesized in toluene by free radical co-polymerization of acrylonitrile with two variable-length bi-functional acrylates, ethylene glycol dimethylacrylate(EGDMA) and hexamethylene diacrylate(HDDA). PAN aerogels were aromatized oxidatively at 240 degree C and further treated pyrolytically to graphite under helium atmosphere at 2300 degree C for 24 hours. Properties of each graphitized form as well as of intermediates after pyrolysis at 800 degree C and 1600 degree C were characterized by scanning electron microscopy(SEM), high resolution transmission electron microscopy(HRTEM), X-ray powder diffraction(XRD), and Raman spectroscopy studies. Although the two crosslinkers, EGDMA and HDDA, are decomposed completely by 800 degree C, their …