Ball-Milling of Graphite and Multi-Wall Carbon Nanotubes

Abstract

The structural modification of graphite and multi-wall carbon nanotubes (MWCNTs) during ball-milling was examined. A comparison of structures after ball-milling was made between graphite and MWCNTs. The ball milling parameters were also examined: milling atmospheres, milling methods, milling mode and the addition of additive materials. In some experiments, hard materials such as alumina or silica were added to graphite and MWCNTs as additives to see whether graphite and MWCTs were shortened by ball-milling. The ball-milling of graphite and MWCNTs with liquid additives reduced the agglomeration of MWCNT and transformed graphite to graphenes. The ball-milling of MWCNTs under impact mode usually resulted in the formation of an amorphous phase, whereas that under friction mode induced the fattening of nanotubes. The results showed that a variety of carbon nanomaterials could be obtained by the proper controlling of ball milling. The structurally modified graphite and MWSNTs are expected to be utilized for energy storage application.

Charged Carbon Nanomaterials: Redox Chemistries of Fullerenes, Carbon Nanotubes, and Graphenes

“…140 For graphite, these internanocarbon bonds lead to intrinsically insoluble materials which must be broken to recover individualized sheets; 141 the application of shear force can be used for exfoliation but usually leads to the recovery of smaller flakes (<1 μm) with higher defectiveness. 142 Impurities are common in the as-received feedstocks of nanocarbon, particularly the synthetic SWCNTs and fullerenes ( Figure 9). There are a variety of possible carbonaceous impurities, most commonly amorphous carbon, which consists of a disorganized network of sp 3 and sp 2 hybridized carbons, which may contain dangling bonds, as well as a variety of heteroatoms.…”

“…or ozone similarly to fullerenes . For graphite, these internanocarbon bonds lead to intrinsically insoluble materials which must be broken to recover individualized sheets; the application of shear force can be used for exfoliation but usually leads to the recovery of smaller flakes (<1 μm) with higher defectiveness …”

Polymer “Tape”‐Assisted Ball‐Milling Method Fabrication Few‐Atomic‐Layered Bismuth for Improving K+/Na+ Storage

“…[ 1 ] Although the ball‐milling method has been widely used to exfoliate the bulk layered materials into 2D materials, it is rarely used to prepare air‐sensitive species, such as black phosphorous and Bi. [ 33 ] The high energy and large force would lead to the oxidation of the as‐prepared nanomaterials even with a trace amount of oxygen inside. The polymer chain will wrap the surface of as‐obtained nanosheets to protect them from oxidation during the exfoliation process.…”

Development and Investigation of The Production Process of the Aluminum Matrix Composition Mechanically Alloyed With Single-Walled Carbon Nanotubes and the Composition Material Made of it

“…The light decrease of the micro-hardness and HRB hardness after sintering is explained by the diffusion bonding of pellets during sintering in the low-melting phase -aluminum (characteristic of sintering of powder compositions consisting of 2 mutually insoluble components) [13][14][15].…”