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Two-dimensional layered material and preparation method and application thereof

A two-dimensional layered, layered material technology, applied in nanotechnology, chemical instruments and methods, graphene, etc. for materials and surface science, and can solve problems such as low efficiency, environmental damage, and difficult industrialized preparation

Pending Publication Date: 2021-08-17
FOSHAN SHENGPENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ultrasonic peeling method usually uses a probe ultrasonic instrument, which has high energy consumption, low efficiency and high cost, and is difficult to be used in industrial preparation. It is currently widely used in small-scale preparation in laboratories
Traditional wet ball milling, high-speed stirring and other mechanical methods also have similar problems, and the waste liquid generated in the production process is very destructive to the environment and cannot meet the requirements of sustainable development
Generally speaking, the yield of the current mechanical exfoliation method is low, and it is difficult to precisely control the microscopic stress state of the material, so it is difficult to achieve precise control of the exfoliation process, and it is also difficult to obtain large-diameter and thin-sheet materials. High-quality nano two-dimensional sheet

Method used

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  • Two-dimensional layered material and preparation method and application thereof
  • Two-dimensional layered material and preparation method and application thereof
  • Two-dimensional layered material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]In this embodiment, a two-dimensional layered material is prepared, and the specific process includes the following steps:

[0036] S1. Weigh 40g of simethicone oil (Dow Corning PMX-2000) and 10g of toluene and mix them uniformly to obtain a rheology-improving fluid. The viscosity is 400mPa·s as measured by an RST-SST rheometer at room temperature at 25°C; ( The viscosity of the rheology-improving fluid after high-pressure homogenization treatment under 1000bar is 382mPa·s);

[0037] S2. Take 10g of boron nitride powder and add it to the rheology-improving fluid prepared in step S1, and use an OA2000-B high-speed mixer to stir and mix to obtain a mixed solution, which is measured by an RST-SST rheometer at a room temperature of 25°C. The viscosity is 1200mPa·s;

[0038] S3. Add the mixed liquid obtained in step S2 into a high-pressure homogenizer, and perform a high-pressure homogenization treatment at 1000 bar for 24 hours. After the treatment, use an RST-SST rheometer...

Embodiment 2

[0041] In this embodiment, a two-dimensional layered material is prepared, and the specific process includes the following steps:

[0042] S1, take by weighing 50g of glucose syrup with a dry matter mass concentration of 50%, 70%, and 80%, respectively, as a rheology-improving fluid, and measure the viscosity of each of the above glucose syrups with a NDJ5S rotational viscometer at room temperature at 25°C, corresponding to 24mPa·s, 500mPa·s, 8500mPa·s; (the viscosities of the above glucose syrups after high-pressure homogenization treatment at 1000bar are 20mPa·s, 430mPa·s, 8100mPa·s respectively);

[0043] S2, the above dry matter mass concentration is 50%, 70%, 80% glucose syrup is mixed with 10g graphite powder respectively, makes mixed solution 1~3, records mixed solution 1~3 with NDJ5S rotational viscometer at room temperature 25 ℃ The viscosity of 3 corresponds to 32mPa·s, 1900mPa·s, 9400mPa·s respectively;

[0044] S3. Add the mixed liquids 1 to 3 prepared in step S2 ...

Embodiment 3

[0047] In this embodiment, a two-dimensional layered material is prepared, and the specific process includes the following steps:

[0048] S1. Weigh 50g of glucose syrup with a mass concentration of 70% as a rheology-improving fluid, mix it with 10g of molybdenum disulfide powder to prepare a mixed solution, and measure its viscosity using an RST-SST rheometer at a room temperature of 25°C is 3000mPa·s;

[0049] S2. Add the mixed solution prepared in step S1 into a high-pressure homogenizer, and perform a high-pressure homogenization treatment at 1000 bar for 24 hours. After the homogenization treatment, the viscosity of the mixed solution increases to a certain extent; and then ultrasonically wash the homogeneous product with 500 ml of toluene , and use a microporous filter membrane to filter, repeat 5 to 10 times to fully wash; ultrasonically disperse the filter cake with 500ml toluene, and absorb the supernatant after standing to obtain a molybdenum disulfide nanosheet disp...

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Abstract

The invention discloses a two-dimensional layered material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing raw materials including layered material powder, a rheology modifier and a solvent to prepare a mixed solution with specific high viscosity, and then carrying out high-pressure homogenization treatment and solid-liquid separation on the mixed solution. According to the method, in the high-pressure homogenizing process, the high-viscosity mixed liquid system can convert local mechanical impact force into shearing force in a larger range, the impact effect between fluid and an interface is buffered, the materials are prevented from being excessively broken by direct impact force, meanwhile, the high-viscosity mixed liquid system can form effective dragging on the two-dimensional material precursor, stripping along the sheet layer direction of the material is realized, and efficient and high-quality preparation of the two-dimensional sheet layer material is realized; by adopting high-pressure homogeneous stripping, the synthesis of various mechanical forces can be realized, and controllable selection and switching of different mechanical action modes can be realized by controlling high-pressure homogeneous parameters and the viscosity of the mixed liquid, so that the material is suitable for preparing two-dimensional materials with different structures, and is high in flexibility.

Description

technical field [0001] The invention relates to the technical field of preparation of two-dimensional layered materials, in particular to a two-dimensional layered material and its preparation method and application. Background technique [0002] Two-dimensional material is a kind of ultra-thin sheet material. The thickness of a single sheet is generally less than ten atomic layers, that is, about 3 to 5 nanometers, and the ratio of surface diameter to thickness is generally above 50. Since Professor Andre Geim of the University of Manchester and his collaborators first stripped single-layer graphene in 2004, two-layer layers such as graphene, hexagonal boron nitride, layered metal chalcogenides, and layered metal oxides Shaped materials have been extensively studied and gradually successfully prepared. The ultra-thin sheet structure of two-dimensional materials makes it have special properties. For example, in graphene, carriers generally propagate in the sheet plane in gr...

Claims

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Application Information

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IPC IPC(8): C01B21/064C01B32/168C01B32/19C01G39/06B82Y30/00B82Y40/00
CPCC01B21/0648C01B32/168C01B32/19C01G39/06B82Y30/00B82Y40/00C01P2004/04C01P2004/64
Inventor 丘陵刘闽苏成会明范维仁丁斯远
Owner FOSHAN SHENGPENG TECH CO LTD
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