Color material under regulation and control of electric field, and preparation method of material

A technology of electric field control and medium, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, etc., can solve the problems of inability to realize display color control, etc., and achieve the effects of fast response speed, expanded application range, and high color brightness

Active Publication Date: 2014-01-01
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Monodisperse TiO 2 /SiO 2 The composite particles are dispersed in absolute ethanol, and the three-dimensional ordered structure of the colloidal crystal obtained after natural evapor

Method used

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  • Color material under regulation and control of electric field, and preparation method of material
  • Color material under regulation and control of electric field, and preparation method of material
  • Color material under regulation and control of electric field, and preparation method of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 8ml, 28% ammonia solution, 147ml ethanol, and 5ml water into a 500ml three-neck flask, stir at 50°C at a speed of 400r / min for 22min, then add 7.2ml tetraethyl orthosilicate dropwise with a peristaltic pump, react for 4h and then Add 38ml of ethanol, adjust the pH value to 10-11 at 50°C, and continue stirring for 10 minutes. Take out 105ml of the solution from the three-neck flask, keep 100ml of the solution, add the ethanol solution of isopropyl titanate dropwise with a peristaltic pump, including 50ml of ethanol and 1ml of isopropyl titanate, continue stirring for 1 hour after dropping, stop stirring for 2 hours , Centrifuge the reacted product to obtain SiO 2 / TiO 2 , washed once with distilled water and ethanol respectively, dried at 50°C to 80°C, and ground for use.

[0028] The silicon oxide nanoparticles coated with titanium oxide were observed by transmission electron microscope, the results can be found in figure 1 ,Depend on figure 1 It can be seen tha...

Embodiment 2

[0032] 0.096g of silicon oxide nanoparticles coated with 7nm thick titanium oxide prepared in Example 1 was dispersed in 0.5mL propylene carbonate to be tested. The test process was the same as in Example 1, and the shape of the obtained spectrum was similar to that in Example 1. , but the overall reflection peak intensity increases.

Embodiment 3

[0034] Disperse 0.0648g of silicon oxide nanoparticles coated with 7nm thick titanium oxide prepared in Example 1 in 0.5mL water to be tested. The test process is the same as in Example 1. The reflection intensity of the obtained spectrum is obviously increased to 30%, and the voltage is increased from 0v to In the process to 5v, the peak position moves from 420nm to 480nm.

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Abstract

The invention discloses a color material under the regulation and the control of an electric field. The color material comprises a medium and a colloidal crystal material uniformly dispersed in the medium, wherein the medium is propylene carbonate or water; the colloidal crystal material is titanium oxide-coated silicon oxide colloidal SiO2/TiO2 nanoparticles; the volume ratio of the colloidal crystal material to the medium is (1-8): (90-95). The prepared color material is a novel off-color material under the regulation and the control of the electric field, and increases the types of color materials under the regulation and the control of electric fields; the colloidal SiO2/TiO2 nanoparticles are synthetized by the one-step method, and the method is simple and effective; through regulating the added amount of a titanium source, different coated thicknesses of titanium oxide can be realized; the prepared color material is high in color display brightness, has obvious color changes under the action of a very small electric field, and is high in respond speed.

Description

technical field [0001] The invention relates to the field of preparation of colloidal crystal passive display materials, in particular to a color-developing material controlled by an electric field and a preparation method thereof. Background technique [0002] With the development of optoelectronic technology, the requirements for information display are getting higher and higher. According to research, when people obtain information from the outside world through various sensory organs, vision accounts for more than 60%. Nowadays, a lot of information is provided through display technology. Display technology and display devices have put forward higher and higher requirements. As a window for man-machine exchange, display devices have a variety of display types, which can be divided into active display and passive display from the perspective of light source. Passive display has attracted widespread attention because of its easy-to-read under strong light, good comfort (cl...

Claims

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Application Information

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IPC IPC(8): C09K9/00
Inventor 罗玉霞孙爱华储成义周石张建飞李勇许高杰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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