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Preparation method of two-dimensional nano muscovite

A two-dimensional nano, muscovite technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem that the interlayer force of muscovite is difficult to overcome, the cost is high, and mica is difficult to be stripped to several Nano and other issues, to achieve the effect of good peeling effect and low cost

Active Publication Date: 2015-03-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of high cost, slow preparation, difficulty in overcoming the interlayer force of muscovite, and difficulty in stripping mica to several nanometers in the prior art, and provide a low-cost, fast and effective method for weakening the interlayer of muscovite. Force, so as to prepare the method of atomic level two-dimensional nano muscovite

Method used

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  • Preparation method of two-dimensional nano muscovite

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Effect test

Embodiment 1

[0024] Heat up 1g of the purified muscovite powder to 650°C at a rate of 5°C / min in a roasting furnace, calcinate for 5h, and cool naturally; place the calcined muscovite powder in 50ml of saturated LiNO 3 solution, react at 70°C for 25 days, add 10g LiNO to the solution every 3 days 3 After completion, centrifuge and wash with water for 3 times; place the obtained muscovite powder in 50ml saturated octadecyltrimethylammonium chloride solution, react at 95°C for 3 days, and centrifuge with 50% ethanol solution with volume percentage concentration after completion After washing for 5 times, the muscovite powder was placed in 100ml of 50% ethanol solution for 20min sonication to obtain two-dimensional nano muscovite. Such as figure 1 Shown is the atomic force microscope photo of the prepared two-dimensional muscovite. It can be seen from the figure that the prepared two-dimensional muscovite has a surface size larger than 1um and a thickness of about 1.704nm.

Embodiment 2

[0026] 1g of purified muscovite powder was heated to 750°C at a rate of 50°C / min in a roasting furnace, calcined for 2 hours, and cooled naturally; the calcined muscovite powder was mixed with NaNO 3 Mix evenly at a ratio of 1:50, place in a muffle furnace, react at 350°C for 10 days, and centrifuge and wash with water for 3 times after completion; place the obtained muscovite powder in 50ml of saturated cetyl dimethyl benzyl chloride react in ammonium chloride solution at 80°C for 3 days, centrifuge and wash 5 times with 50% ethanol solution by volume percentage after completion, freeze-dry, and grind for 5 hours with a three-head grinder to obtain two-dimensional nano muscovite.

Embodiment 3

[0028] Heat 1g of the purified muscovite powder to 700°C at a rate of 30°C / min in a roasting furnace, calcine for 3 hours, and cool naturally; mix the calcined muscovite powder with LiCl at a ratio of 1:150, and place in a muffle furnace reaction at 300°C for 2 days, and centrifuged and washed 3 times with water after completion; the obtained muscovite powder was placed in 50ml of saturated benzylmethylethylamine chloride solution, reacted at 80°C for 3 days, and after completion, use a concentration of 50% by volume The ethanol solution was centrifuged and washed 5 times, and the muscovite powder was placed in 150 ml of saturated benzylmethylethylamine solution and sonicated for 20 min to obtain two-dimensional nano muscovite.

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Abstract

The invention relates to a method for preparing two-dimensional nano muscovite. The method comprises the following steps: heating muscovite powder in a roasting furnace to 650-750 DEG C at 5-50 DEG C / min, calcining for 2-5h, naturally cooling, exchanging all potassium ions among the lamellas of the calcined muscovite by virtue of positive ions, washing and freeze-drying, and processing the muscovite by virtue of a mechanical process for 20min-5h so as to obtain the two-dimensional nano muscovite. The preparation method disclosed by the invention has the beneficial effects that by virtue of calcining and ion exchange, the inter-lamellar spacing of the muscovite is increased and the inter-lamellar force is weakened, and the inter-lamellar force is destructed by virtue of the mechanical process, so that the muscovite exists in the form of a single lamella or a few of lamellas and therefore, the two-dimension nano muscovite is prepared. The preparation method is low in cost, rapid and effective. The method is good in stripping effect, and the thickness of the prepared two-dimension nano muscovite can reach atomic grade. A tearing method by the viscosity of an adhesive tape and a hand-tearing method are suitable for preparing the two-dimension nano muscovite with controllable thickness in a small quantity, and a grinding method and an ultrasonic method are suitable for preparing the two-dimension nano muscovite on a large scale.

Description

technical field [0001] The invention belongs to the technical field of two-dimensional material preparation, and in particular relates to a method for preparing two-dimensional nano muscovite by destroying the interlayer force of the muscovite. Background technique [0002] In recent years, represented by graphene, two-dimensional nanomaterials prepared by exfoliating layered materials have attracted widespread attention from the society due to their excellent properties and broad application prospects. Muscovite, as a cheap and abundant phyllosilicate mineral in nature, has perfect cleavage properties and is an excellent source of two-dimensional nanomaterials. Different from the conductivity of graphite, muscovite has good thermal insulation and electrical insulation, and has important applications in fire protection, chemical industry, and building materials industries. However, due to the unique structural characteristics of muscovite, the preparation methods based on i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/26B82Y30/00
Inventor 宋少先贾菲菲杨炳乔苏静赵云良刘艳艳
Owner WUHAN UNIV OF TECH
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