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A kind of magnetron liquid crystal and preparation method thereof

A liquid crystal and magnetron technology, applied in the field of display devices, can solve the problems of instability, incomplete research on the properties of inorganic nanoparticles, immature synthesis technology, etc., and achieve the effects of strong stability, short preparation period and great application potential.

Active Publication Date: 2020-12-25
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, the research on inorganic liquid crystals is still in its infancy, and there are still some problems in research and application. For example, inorganic liquid crystals are dispersed phase systems, and the phase interface makes them thermodynamically unstable. Change the system; the research on the properties of inorganic nanoparticles is not thorough enough, its characteristics cannot be well controlled, and it can be applied in practice, and the synthesis technology is not mature

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  • A kind of magnetron liquid crystal and preparation method thereof
  • A kind of magnetron liquid crystal and preparation method thereof
  • A kind of magnetron liquid crystal and preparation method thereof

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Embodiment approach

[0028] According to one embodiment of the present invention, the anisotropic nanostructure is a one-dimensional non-(intrinsically) magnetically anisotropic nanostructure.

[0029] In a further preferred embodiment, the anisotropic nanostructure is selected from one or more of nonmagnetic nanorods, nanowires, and nanotubes.

[0030] In a still further preferred embodiment, the nonmagnetic anisotropic nanostructures are nonmagnetic nanorods.

[0031] According to the present invention, the non-magnetic anisotropic nanostructure is selected from inorganic materials, including attapulgite, sepiolite and other mineral materials, preferably including attapulgite, more preferably attapulgite.

[0032] According to the present invention, the magnetic cladding material includes one or more of ferrite, Fe / Co / Ni and alloys thereof, iron nitride and other ferromagnetic or superparamagnetic materials, preferably including Fe 3 o 4 , more preferably Fe 3 o 4 , the magnetic shell includ...

Embodiment 1

[0088] Prepare attapulgite@ferric oxide one-dimensional magnetic nanocomposite, as follows: Prepare 100 mL of attapulgite aqueous suspension of 1 mg / mL, add 20 mg of polyethyleneimine to the dispersion, stir evenly, and obtain a stable Suspension liquid; pass nitrogen protection to the suspension liquid, and keep stirring; add ferric chloride 1.0mmol and ferrous sulfate 0.5mmol, react at 60°C for 5 minutes; continue to add 5mL of ammonia water, react at 60°C for 30 minutes; Centrifuge the above suspension to obtain the attapulgite@ferroferric oxide one-dimensional magnetic nanocomposite material.

[0089] On the XRD spectrum of the composite material, there are crystal plane diffraction peaks at 2θ of 8.50°, 30.20°, 35.42°, 43.10°, 53.60°, 57.09° and 62.70°; 3 o 4 On the XRD pattern of the attapulgite, there are crystal plane diffraction peaks at 2θ of 8.50°, 13.91°, 16.40° and 19.85°, Fe 3 o 4 There are crystal plane diffraction peaks at the 2θ of 30.20°, 35.42°, 43.10°, 5...

Embodiment 2

[0094] Preparation of attapulgite@ferric oxide one-dimensional magnetic nanocomposite;

[0095] Add the above-mentioned magnetic nanocomposite material into 0.001mol / L hydrochloric acid to prepare a 0.01% dispersion, stir evenly, and obtain a stable colloidal dispersion;

[0096] Place a magnet at a distance of 2 cm from the colloidal dispersion to obtain magnetic liquid crystals oriented along the magnetic field.

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Abstract

The invention relates to a magnetic control liquid crystal and a preparation method thereof. The preparation method comprises: preparing a one-dimensional magnetic nanometer composite material; dispersing the one-dimensional magnetic nanometer composite material in a solution to prepare a colloidal dispersion liquid; and applying an external magnetic field to the colloidal dispersion liquid to obtain the magnetic field regulated liquid crystal. According to the present invention, the preparation method has characteristics of simple conditions, short preparation period and low cost; the obtained colloidal dispersion liquid has high stability; and the prepared magnetic control liquid crystal has characteristics of high magnetic responsiveness and short relaxation time, and has great application potential in the field of display devices, wherein the light transmittance of the liquid crystal can be controlled at any time by controlling the strength and the direction of the magnetic field so as to control the optical properties of the liquid crystal.

Description

technical field [0001] The invention belongs to the field of display devices, in particular to a magnetron liquid crystal or a magnetron liquid crystal material and a preparation method thereof. Background technique [0002] In recent years, one-dimensional nanomaterials such as nanorods, nanowires, and nanotubes have received great attention because their ordered structures have great potential for development in the field of nano-optoelectronics. Bottom-up assembly of colloidal nanostructures, as an effective way to assemble ordered nanostructures, is also widely used in the assembly and preparation of ordered arrays of one-dimensional nanostructures. In particular, magnetic field orientation is used to realize the arrangement of magnetic one-dimensional nanomaterials from disorder to order. The magnetic orientation of intrinsic one-dimensional nanomaterials has made some progress in recent years. Considering that these one-dimensional nanomaterials are magnetic, they ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/08C01B33/40C09K19/40H01F1/00B82Y40/00
CPCB82Y40/00C01B33/40C01G49/08C01P2004/03C01P2004/04C01P2004/16C01P2004/80C09K19/406H01F1/0045
Inventor 张泽朋付萌黎相明
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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