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Two-dimensional nanoscale ultrathin talc sheet and preparation method thereof

A two-dimensional nano and talc flake technology, applied in the direction of nanotechnology, magnesium silicate, silicate, etc., can solve the problem of low yield of single-layer materials, and achieve high yield, low energy consumption, and environmental friendliness

Active Publication Date: 2019-09-03
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the method of mechanical force-assisted liquid phase stripping is simple and easy to implement. However, traditional solvents use toxic organic liquids such as NMP, so how to choose and prepare a suitable green solvent is a basic problem.
In addition, the yield of single-layer material obtained by traditional mechanical-assisted liquid phase exfoliation method is relatively low (1-3 mg / mL), how to improve the yield of this method is also a difficulty in its industrialization

Method used

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  • Two-dimensional nanoscale ultrathin talc sheet and preparation method thereof
  • Two-dimensional nanoscale ultrathin talc sheet and preparation method thereof
  • Two-dimensional nanoscale ultrathin talc sheet and preparation method thereof

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preparation example Construction

[0036] Prepare talc raw material powder dispersion. The talc raw material powder dispersion comprises the following raw materials: water (preferably deionized water), talcum powder raw material, pH regulator, surfactant, stabilizer, ion aid and the like. An exemplary preparation method includes: mixing talc powder, deionized water, surfactant, pH adjuster, stabilizer and ion additive to obtain a mixed solution (talc raw material powder dispersion).

[0037] In an optional embodiment, the talcum powder raw material used may be talc powder of 400 mesh to 1000 mesh, preferably talc powder of 600 mesh to 800 mesh. Based on the mass of the talc powder, the solid content of the talc powder in the talc raw material powder dispersion can be 1% to 8%, preferably 2% to 5%.

[0038] In an optional embodiment, the pH regulator can be at least one of sodium hydroxide, potassium hydroxide, cesium hydroxide, sodium bicarbonate, ammonium bicarbonate, ammonium hydroxide, triethylamine, prefer...

Embodiment 1

[0049] Embodiment 1: prepare a kind of two-dimensional nanoscale ultrathin talc sheet

[0050] The preparation process of the two-dimensional nanoscale ultra-thin talc sheet comprises the following steps:

[0051] (1) prepare 5L stable talcum raw material dispersion, its chemical raw material ratio is: 200g 800 purpose talcum powder raw material, 2g sodium dodecylbenzene sulfonate (SDBS), 0.5g sodium chloride (NaCl), use Set the volume to 5L with ionic water, then adjust the pH to 9 with 10% NaOH solution;

[0052] (2) The talc raw material dispersion in step (1) is sanded by a sand mill, and its mechanical parameters are: 2500rpm, 30min. Obtain activated talc dispersion;

[0053] (3) The activated talc dispersion in step (2) is subjected to ultrasonic treatment, and its power and time parameters are respectively: 500W, 45min. Obtain a two-dimensional nano-scale ultra-thin talc flake dispersion;

[0054] (4) obtaining wet two-dimensional nanoscale ultrathin talc flakes aft...

Embodiment 2

[0057] Embodiment 2: prepare a kind of two-dimensional nanoscale ultrathin talc sheet

[0058] The preparation process of the two-dimensional nanoscale ultra-thin talc sheet comprises the following steps:

[0059] (1) prepare 5L stable talcum raw material dispersion, its chemical raw material ratio is: 200g 800 purpose talcum powder raw material, 2g cetyltrimethylammonium bromide (CTAB), 0.5g sodium chloride (NaCl), Dilute to 5L with deionized water, then adjust the pH to 9 with 10% NaOH solution;

[0060] (2) The talc raw material dispersion in step (1) is sanded by a sand mill, and its mechanical parameters are: 2500rpm, 30min. Obtain activated talc dispersion;

[0061] (3) The activated talc dispersion in step (2) is subjected to ultrasonic treatment, and its power and time parameters are respectively: 500W, 45min. Obtain a two-dimensional nano-scale ultra-thin talc flake dispersion;

[0062] (4) obtaining wet two-dimensional nanoscale ultrathin talc flakes after solid-...

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Abstract

The invention relates to a two-dimensional nanoscale ultrathin talc sheet and a preparation method thereof. The lateral dimension of the two-dimensional nanoscale ultrathin talc sheet is 50 nm to 2 mum, and the thickness direction dimension is 1 nm to 30 nm. The ratio of the lateral dimension to the thickness dimension is (50 ~ 2000): 1; preferably, the two-dimensional nanoscale ultrathin talc sheet has a lateral dimension of 100 nm to 1 m u m and a thickness dimension of 1 nm to 20 nm.

Description

technical field [0001] The invention relates to a two-dimensional talc nanomaterial, in particular to a macro two-dimensional nanoscale ultra-thin talc sheet and a preparation method thereof, belonging to the field of two-dimensional nanomaterial preparation. Background technique [0002] Two-dimensional nanomaterials refer to materials with large lateral dimensions and only one or a few atomic layers thick in the thickness direction. In 2004, Andre Geim of the University of Manchester in the UK and his collaborators used the tape stripping method to separate an atomic layer of graphite (ie, graphene) from bulk graphite for the first time. Since then, research on the preparation and performance of two-dimensional materials And applied exploration has spread rapidly in the scientific and industrial circles with the momentum of a prairie fire. Two-dimensional materials with different chemical compositions, such as hexagonal boron nitride (h-BN), graphitic carbon nitride (g-C3...

Claims

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Application Information

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IPC IPC(8): C01B33/22B82Y40/00
CPCC01B33/22B82Y40/00C01P2004/64C01P2004/62C01P2004/61C01P2004/24C01P2004/04C01P2004/54C01P2004/20
Inventor 黄富强梁晨亮秦明升
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI