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Polyurethane with electrochromism performance and preparation method thereof

An electrochromic, polyurethane technology, applied in the preparation of organic compounds, the preparation of carbamate derivatives, and color-changing fluorescent materials, etc., can solve the problems of difficulty in measuring electrochromic properties, easy shedding, etc., and achieve good electrochemical redox reversibility. The effect of high stability, high cycle life and high sensitivity to color change

Inactive Publication Date: 2012-10-03
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing polymer film is easy to fall off in an organic solution and it is difficult to measure its electrochromic performance, and provides a polyurethane with electrochromic performance and a preparation method thereof

Method used

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  • Polyurethane with electrochromism performance and preparation method thereof
  • Polyurethane with electrochromism performance and preparation method thereof
  • Polyurethane with electrochromism performance and preparation method thereof

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specific Embodiment approach 2

[0033] Specific embodiment two: the preparation method of a kind of polyurethane with electrochromic performance of the present embodiment is carried out according to the following steps:

[0034] 1. Synthesis of monomers

[0035] a, diaminotriphenylamine derivatives and p-Hydroxybenzaldehyde are mixed uniformly in a molar ratio of 1: 2 to 3 to obtain a mixture; b, the mixture obtained in step a and the solvent are in a mass volume ratio of 0.8 to 2.1g : 100mL ratio to mix evenly to obtain a mixed solution, then under the condition of nitrogen protection, raise the temperature of the mixed solution to 120°C-140°C, stir at a speed of 20-50rpm, when the solvent in the mixed solution evaporates to the original volume of the mixed solution When the volume is 1 / 4, stop stirring and collect the remaining 1 / 4 volume of liquid; c. Put the remaining 1 / 4 volume of liquid collected in step b into distilled water, let it stand for 6-12 hours, and then put it in a vacuum with a degree of 0...

specific Embodiment approach 3

[0039] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the diaminotriphenylamine derivative described in step 1 is 4,4′-diamino-4″-N-carbazolyltriphenylamine, N, N-bis(4-aminophenyl)-N',N'-diphenyl-1,4-phenylenediamine, N'-(4-aminophenyl)-N'-(4-ethoxy) Phenyl-1,4-phenylenediamine, N,N'-bis(β-naphthyl)-N,N'-bis(4-aniline)-p-phenylenediamine, N'-(4-aminophenyl) -N'-phenyl-1,4-phenylenediamine, N',N'-diphenyl-N,N'-di(4-aniline)-p-phenylenediamine, N',N'-diphenyl -N, N'-bis(4-phenylamine) biphenylenediamine or N,N'-bis(α-naphthyl)-N,N'-bis(4-phenylamine)biphenylenediamine.Others and step 2 same.

specific Embodiment approach 4

[0040] Embodiment 4: The difference between this embodiment and Embodiments 2 to 3 is that the molar ratio of the diaminotriphenylamine derivative and p-hydroxybenzaldehyde described in step 1 is 1:2-3. Others are the same as steps two to three.

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Abstract

The invention discloses polyurethane with electrochromism performance and a preparation method of the polyurethane, and relates to polyurethane and a preparation method thereof. The invention solves the problem that the prior polymer film is easy to drop in the organic solution, so that the electrochromism performance of the prior polymer film is difficult to detect. The structural formula of polyurethane is as follows: the method comprises the following steps of: enabling a diamido-triphenylamine derivative and p-hydroxy benzaldehyde to react to synthesize a monomer; enabling the monomer and isocyanate mixed liquid to react for 12-14 hours at 120-140 DEG C; and filtering and drying the product. The polyurethane disclosed by the invention has good electrochemical oxidation reduction reversibility, fast response time of color change and better chemical stability. The invention is applied in the electrochromism field.

Description

technical field [0001] The invention relates to a polyurethane and a preparation method thereof. Background technique [0002] Electrochromism refers to the phenomenon that under the action of current or electric field, the material undergoes light absorption or light scattering, resulting in a reversible change in color. Since the display screen made of electrochromic material has no viewing angle display limitation, and has rich colors and fast response time, it is expected to be used to replace liquid crystal display. In addition, the potential value of electrochromic materials in military camouflage and smart materials has attracted more and more attention. [0003] Electrochromic materials can be roughly divided into inorganic electrochromic materials and organic electrochromic materials according to material types. Inorganic materials are electrochromic materials that have been studied earlier, and have the advantages of high color contrast, high cycle stability, str...

Claims

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Application Information

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IPC IPC(8): C08G18/32C07D209/86C07C271/58C07C269/02C09K9/02
Inventor 牛海军郝丽苹孙岩张春雨张坤温海林
Owner HEILONGJIANG UNIV
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