Dry ball milling of graphite with cellulose and related polysaccharides was found effective for exfoliation-dispersion of graphene-like carbon. The exfoliation behavior was found to depend strongly on the polymer species; namely, polysaccharides are much more effective than thermoplastic polymers
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Raman spectra of the milled graphite are shown in Fig. 1. After heating the samples for 1 h at 1200 °C in an argon atmosphere the spectra were indistinguishable from those of the as-milled powders indicating that there was no graphitisation under these conditions.
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The ball-milling in liquid media leads to well organized, thin and highly anisometric graphite (HAG) crystals. The presence in the milling container of a liquid, which acts as a lubricant and decreases the violence of the shocks, is relevant.
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High-energy ball milling has been used to produce nanocrystalline and amorphous struc- tures in nature graphite, but Raman spectroscopy analysis shows that the structure of the amorphous phase produced by ball milling is less disordered than the amorphous
Abstract. Low-cost, high-yield production of graphene nanosheets (GNs) is essential for practical applications. We have achieved high yield of edge-selectively carboxylated graphite (ECG) by a simple ball milling of pristine graphite in the presence of dry ice.
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