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Abstract: Homogenous graphitic nanofibres GNFs have been synthesised by heattreatment of electrospun polyacrylonitrile in dimethylsulphoxide, offering anew solution route of low toxicity to manufacture sub-60 nm diameter GNFs.Fibre beading resulting from the spinning of low-concentration polymersolutions can be reduced with the addition of surfactant or sodium chloride.Characterisation techniques including X-ray diffraction, scanning- andtransmission electron microscopy have been used to quantify the effect of thegraphitisation process, by heat treatment up to 3000 deg. C, on the weight,diameter and structural morphology of the nanofibres. The GNFs have anentangled micro-fibril structure with graphitic ordering of up to 40 graphenelayers after treatment at 3000 deg. C. There is little difference in the degreeof graphitisation of GNFs prepared with a 250 deg. C oxidation step comparedwith those prepared without, but oxidised GNFs retain more of their originalmass after heating under argon flow.



Autor: Zeynep Kurban, Arthur Lovell, Derek Jenkins, Steve Bennington, Ian Loader, Alex Schober, Neal Skipper

Fuente: https://arxiv.org/







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