Abstract
Various technologies and equipment for the production of graphene-containing suspensions by liquid-phase exfoliation of graphite are considered. The prospects of using liquid-phase graphite shear exfoliation in a continuous mode are shown. Taking into account the analyzed shortcomings of existing technologies, a technology for the production of graphene-containing suspensions and concentrates by cascade exfoliation of graphite and a device for its implementation are proposed. In particular, the following are proposed: a new method for two-stage dosing of graphite powder; new design of rod drum mill for mechanical activation of graphite; a new design of the rotary apparatus with compound movable blades, providing an increase in shear forces acting on graphite particles in the process of exfoliation. The kinetics of the exfoliation process has been studied. Experimental studies on the modification of concrete with graphene have been carried out and an increase in compressive strength of at least 33% has been proven.
Published Version
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