Ball-milling device and stripping method for stripping natural two-dimensional clay material

Abstract

The invention relates to a ball-milling device for stripping a natural two-dimensional clay material. The ball-milling device comprises a ball-milling tank body, a ball-milling tank cover and a ball-milling tank base, the ball-milling tank cover is detachably connected with the upper end of the ball-milling tank body, and the lower end of the ball-milling tank body is fixedly connected with the ball-milling tank base. A supporting base is arranged below the ball-milling tank base, the lower end of the ball-milling tank base is connected with a motor for driving the ball-milling tank body to rotate, and the motor is vertically mounted in the supporting base. The outer side of the ball-milling tank body is sleeved with an outer cover, the lower end of the outer cover is in threaded connection with the supporting base, at least two rows of magnets are vertically embedded in the inner wall of the outer cover, and a gap is formed between the inner wall of the outer cover and the outer wall of the ball-milling tank body. The stripping method for stripping the natural two-dimensional clay material comprises the following steps: dispersing natural two-dimensional clay material particles in a sodium chloride solution, heating and stirring, mixing the obtained particles with magnetic particles, and carrying out magnetic control ball milling in the ball-milling tank body. By means of the ball-milling device and method, the two-dimensional material which is good in stripping degree, high in flaky proportion and capable of being produced in a large scale can be obtained.

Description

technical field [0001] The invention relates to the technical field of separation of natural two-dimensional clay materials, in particular to a ball milling device and a method for exfoliating natural two-dimensional clay materials. Background technique [0002] Clay with natural layered structure is one of the main minerals constituting the earth's crust, and its chemical properties are stable. Generally, the layers are connected by weak forces such as van der Waals force and electrostatic force. They come from a wide range of sources, are cheap and easy to obtain, and have excellent thermal and chemical stability. They are widely used in various fields such as adsorption, catalysis, and coating. The two-dimensional nanomaterial obtained by exfoliating the natural two-dimensional layered clay material can be applied to prepare various layered nanocomposites, and has good mechanical, flame-retardant, and electrical properties. Therefore, it is crucial to exfoliate 2D materi...

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Problems solved by technology

[0003] However, the traditional exfoliation technology, especially the wet mechanical ball milling method, separates the flake materials through the continuous collision between the clay and the ball milling medium. However, due to the large volume of the ball milling medium and the fact that the Van der Waals force between the clay layers has not been weakened, Difficult to separate 2D materials in flake form

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