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Electrochromic material and preparation method thereof, and anti-dazzling automobile rear-vision mirror

An electrochromic material, a technology for automotive rearview mirrors, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, vehicle components, etc., can solve the problems of slow response time, image distortion, etc. Effect of color change time reduction

Active Publication Date: 2014-01-01
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention aims to solve the problems of slow response time of electrochromic materials and image distortion after discoloration existing in the prior art

Method used

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  • Electrochromic material and preparation method thereof, and anti-dazzling automobile rear-vision mirror
  • Electrochromic material and preparation method thereof, and anti-dazzling automobile rear-vision mirror
  • Electrochromic material and preparation method thereof, and anti-dazzling automobile rear-vision mirror

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Synthesize the electrochromic material of the present invention

[0034] Weigh 0.02mol of bipyridine and 0.03mol of 1,2,4,5-tetracyano-3-bromobenzene into a 250ml round-bottomed flask, add 50mL of acetonitrile at 90°C for 15h under reflux, a black precipitate is produced, wait After the reaction, the compound was washed with ethanol, filtered and dried in vacuum. Add 10 mL of the above product solution to deionized water into 100 mL of saturated LiClO 4 Stir in the aqueous solution to obtain purple-black solid particles, filter with suction, and dry in vacuum to obtain the electrochromic material A1 of the present invention.

[0035] 2) Assemble the rearview mirror

[0036]The electrochromic material A1 obtained in the above steps, and the phenothiazine according to the molar ratio of 1:1, add the solution to configure the electrochromic material in the electrochromic layer, the solution is propylene carbonate, the electrochromic material The concentration of A is...

Embodiment 2

[0038] The difference from Example 1 is that 0.02mol of bipyridine and 0.03mol of 1,7-dicyano-5-bromonaphthalene are added to a 250ml round bottom flask, and 50mL of DMF (N,N-dimethylformaldehyde Amide) was refluxed at 100° C. for 10 h to produce a black precipitate. After the reaction was complete, the compound was washed with acetonitrile, filtered and dried in vacuo. Add 10 mL of the above product solution to deionized water into 100 mL of saturated LiClO 4 Stir in the aqueous solution to obtain black solid particles, filter with suction, and dry in vacuum to obtain the electrochromic material A2 of the present invention.

[0039] A rearview mirror A22 is formed.

Embodiment 3

[0041] The difference from Example 1 is that 0.02mol of bipyridyl and 0.03mol of 2,6-dicyano-4-bromonaphthalene are added to a 250ml round bottom flask, and 50mL of DMF (N,N-dimethylformaldehyde Amide) was refluxed at 100° C. for 10 h to produce a black precipitate. After the reaction was complete, the compound was washed with acetonitrile, filtered and dried in vacuo. Add 10 mL of the above product solution to deionized water into 100 mL of saturated LiClO 4 Stir in the aqueous solution to obtain black solid particles, filter with suction, and dry in vacuum to obtain the electrochromic material A3 of the present invention.

[0042] Form the rear view mirror A33.

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Abstract

The invention provides an electrochromic material and a preparation method thereof, and an anti-dazzling automobile rear-vision mirror prepared from the electrochromic material. The electrochromic material comprises a purpurine compound provided with an adjusting group; the adjusting group is R in a formula shown in the specification, and is a cation adjusting group; and R is one or more of groups shown in the specification. The anti-dazzling automobile rear-vision mirror prepared from the electrochromic material comprises a glass substrate, a conductive layer, an electrochromic layer, a conductive layer, a glass substrate, a reflecting layer and a protective layer in turn. The anti-dazzling automobile rear-vision mirror prepared from the electrochromic material has the color change time greatly shortened; meanwhile, the color is black after color change, and the problem of image distortion after the rear-vision mirror changes color is solved.

Description

technical field [0001] The invention relates to an electrochromic material, a preparation method thereof, and an anti-glare automobile rearview mirror using the electrochromic material. Background technique [0002] Electrochromism refers to the phenomenon that the optical properties (transmittance or reflectance, etc.) of materials produce stable and reversible changes in the visible light range under the drive of an applied voltage. In appearance, electrochromic materials usually exhibit reversible changes in color and transparency. At present, a variety of products using electrochromic materials have been launched on the market, such as: car rearview mirrors for reducing glare, smart windows that adjust reflection or absorb sunlight according to light changes, etc. [0003] Organic electrochromic materials achieve reversible changes in coloring and decolorization through the redox reaction that occurs. Its advantages are: fast color change, large viewing angle, high con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K9/02C07D213/22B60R1/08
Inventor 谭海荣李丽坤叶莎莎
Owner BYD CO LTD
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