Scalable production of graphene sheets by mechanical delamination

Spark plasma sintering of Si3N4/multilayer graphene composites

“…As reference graphene free silicon nitride was also sintered. The MLG additions were prepared by the mechanical milling method [20], similar to the method used by Knieke et al [21]. These mixtures were milled in an attritor mill equipped with Si 3 N 4 grinding media (diameter of 20 mm) in a 750 ml silicon nitride tank.…”

Facile and size-controllable preparation of graphene oxide nanosheets using high shear method and ultrasonic method

“…The shear force can cleave graphite oxide from their outer surface [61] (Figure 11(a)), while the impacting force peels off thin GO nanosheets from the edge of graphite oxide [62] (Figure 11(b)). Concurrently, the impacting force also can lead to the in-plane fracture of the GO [63] (Figure 11(b)), which will reduce the area of the GO nanosheets. In a word, high-speed shear mixer is the shear-dominated mixer, which can effectively break van der Waals forces between adjacent GO layers without breaking them, and lead to the fabrication of GO nanosheets with large area, similar to the scotch tape in micromechanical exfoliation process [5,63].…”

Delamination of graphite in a high pressure homogenizer

“…These methods can be divided into bottom-up (e.g. chemical vapor deposition) and top-down approaches, namely ultrasonication, 9-11 dry or wet planetary ball milling, [12][13][14][15] stirred media delamination [16][17][18] and high shearmixing in rotor-stator devices [19][20][21] in either organic solvents or water-surfactant mixtures. Today, even combination of techniques is known, e.g.…”