A ball mill that provides pure shear exfoliation to prepare graphene and its use method

Abstract

The invention relates to ball milling equipment for preparing graphene by providing pure shearing stripping and a using method of ball milling equipment, and belongs to the technical field of mechanical ball milling graphene preparing. The ball milling equipment comprises a rotating drum and a ball milling drum. The ball milling drum is formed by welding the bottom of the ball milling drum to a base through two stainless seamless polished pipes of the same height and different diameters, meanwhile, it is ensured that the two polished pipes are concentric, and the distance between the outer diameter of an inner pipe and the inner diameter of an outer pipe of the ball milling drum is certain. The rotating drum is a special-diameter stainless seamless polished pipe, two troughs with downward trough channels are formed in the upper portion of the inner wall of the rotating drum, and the troughs make the rotating drum be connected with a main shaft of a vertical stirring ball milling machine to transmit torque. The bottom of the rotating drum is inserted between the inner pipe and the outer pipe of the ball milling drum. According to the ball milling equipment, relative to a general mechanical method such as a planetary-type ball milling method and a stirring-type ball milling method, shearing action can be provided continuously, collision of ball milling is reduced effectively, a lattice structure of graphene is protected well, and meanwhile, the high shearing efficiency is achieved.

Description

technical field [0001] The invention relates to a ball milling equipment and method for preparing graphene by pure shear exfoliation, and belongs to the technical field of graphene preparation by mechanical ball milling. Background technique [0002] Graphene is a honeycomb-like two-dimensional atomic crystal structure in which C single atoms connected by sp2 orbital hybridization are closely arranged in regular hexagons. Single-layer graphene has a certain degree of wrinkles, and this unique two-dimensional crystal structure gives it many properties. Its theoretical specific surface area is 2630m2 / g, and its excellent thermal conductivity is 5000J / (m·K·s). Studies have shown that its weak elastic modulus is 1.06×103GPa and Young's modulus is 1.0TPa. Among known materials, graphene has the highest strength of 130GPa, more than 100 times that of steel. Graphene has a stable regular hexagonal lattice structure so that it has excellent electrical conductivity, exhibits a stro...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the present invention provides a ball milling equipment for preparing graphene by pure shear exfoliation and its use method, which is used to solve the problem that the planetary ball milling method will cause collisions between grinding balls and thereby destroy graphene Insufficiency of crystal structure and low shear efficiency, the problem that the stirring ball milling method will cause falling in the rotating gap and cause serious collisions, and the problem of low content of graphene prepared by the existing mechanical ball milling method

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