Method for stripping laminated inorganic material

Abstract

The invention relates to a method for stripping a laminated inorganic material, which comprises the following steps of: firstly preparing a laminated inorganic material organic intercalation compound, then decomposing the organic substance at the interlayer of the solid of the laminated inorganic material organic intercalation compound or the laminated inorganic material organic intercalation compound added into a proper solution within short time under the condition of ultrasonic waves or microwaves, escaping from the interlayer of the laminated inorganic material so as to rapidly strip the laminated inorganic material, and finally separating, washing, drying and grinding to obtain a product. By using the method, not only the laminated inorganic material can be stripped within short time, but also the good crystal structure of the laminated inorganic material can be kept, so that the traditional application of the laminated inorganic material is qualitatively improved, and the value is doubled and redoubled.

Description

Technical field: [0001] The invention relates to a method for peeling off layered inorganic materials, which belongs to the field of preparation of inorganic ultrafine sheet materials. Background technique: [0002] Layered inorganic materials (kaolin, montmorillonite and anionic clay, etc.) are very important non-metallic mineral materials. Among them, kaolin is mainly used in industries such as papermaking, rubber, ceramics, pigments, cement, building materials, and refractories; montmorillonite is a natural nano-powder with high colloidal properties, plasticity, and cohesive force. Its water absorption is very strong, and it expands with water, and its volume can increase several times to ten times. It is the main component of bentonite. It can be used as drilling mud, binder for foundry sand and iron ore pellets, filler for papermaking, rubber, cosmetics, raw material for absorbents, petroleum decolorization and cracking catalysts in textile and petroleum industries; an...

AI Technical Summary

Problems solved by technology

[0003] The peeling technology of layered inorganic materials includes mechanical grinding peeling method and chemical peeling method. The disadvantage of mechanical grinding method alone is: excessive grinding will destroy the crystal structure of inorganic materials, resulting in poor product performance; the principle of chemical peeling is to use intercalation The interlayer effect makes the layered inorganic materials expand between layers, and the bonding force is greatly weakened. After removing the intercalation object, the original stacked sheet-like layered inorganic materials are naturally decomposed into small flake-like inorganic materials to achieve the purpose of natural exfoliation

Among them, Tsunematasu et al. used the grinding method to exfoliate the kaolin-urea intercalation complex, but the formed particles were in the micron and submicron scales, and could not reach the nanoscale, and most of them became aggregates of amorphous particles, destroying The original crystal structure of kaolinite is destroyed; in addition, because ultrasonic waves can generate local ultra-high temperature and ultra-high pressure, and ultrasonic cavitation produces high cavitation energy, resulting in violent collisions between particles on the solid surface, reducing the particle size, Pérez -Maqueda and Pérez-Rodríguez et al obtained nanoscale vermiculite and mica flake particles by ultrasonically treating the large crystal particles of vermiculite and mica; Franco et al. used ultrasonic treatment of a mixture of water and kaolin to achieve a good peeling effect, And the crystal structure remains good, but it takes a long time and it is difficult to realize industrial production

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