Electrochemical crosslinking type high-performance electrochromic film as well as preparation method and application thereof

An electrochromic, high-performance technology, applied in hybrid capacitor electrolytes, optics, nonlinear optics, etc., can solve the problems of difficult material synthesis and rising raw material production costs, and achieve excellent photoelectric activity, thermal stability, and good controllability , The effect of simple film making method

Active Publication Date: 2022-03-08
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the improvement of the conjugation degree of the color-changing group, the dif...

Method used

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  • Electrochemical crosslinking type high-performance electrochromic film as well as preparation method and application thereof
  • Electrochemical crosslinking type high-performance electrochromic film as well as preparation method and application thereof
  • Electrochemical crosslinking type high-performance electrochromic film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092]Example 1: Polymer P1 is obtained by polymerizing the precursor monomer 4,4'-(phenylureadiyl)biphenol and 4,4'-difluorobenzophenone. The specific operation is as follows: commercially available triphenylamine Add the monomer 4,4'-(phenylureadiyl)biphenol, 4,4'-difluorobenzophenone, potassium carbonate, sulfolane and toluene into the three-necked flask in a certain proportion, install the thermometer, tetrafluoroethylene Stirring paddle and oil-water separator and condenser tube. Toluene is selected as the oil-water separation reagent, and toluene is added to the separator until it is flush with the outlet of the branch pipe. Under the condition of continuously feeding argon gas protection, the temperature of the oil bath is controlled to be 145 degrees Celsius, and the mixture is heated and stirred. Start timing when the liquid in the oil-water separator has obvious droplets or becomes turbid, and take water for 3 hours to remove the water in the flask. When the two-ph...

Embodiment 2

[0101] Example 2: Preparation of a cross-linked polymer film by cyclic voltammetry: a standard three-electrode system is used, that is, ITO spin-coated with a polymer film is used as a working electrode; a silver / silver ion electrode is used as a reference; a platinum wire is used as a counter electrode. The electrolytic solution is an acetonitrile solution of tetrabutylammonium perchlorate with a concentration of 0.1 mole per liter. The start and stop voltages are 0 volts and 0.8 volts, respectively. Select 500 circles for the number of circles. After electrification, rinse the ITO electrode three times with acetonitrile and water respectively, and then put it into a vacuum drying oven at 120 degrees Celsius for 4 hours to obtain a cross-linked polymer film prepared by cyclic voltammetry.

Embodiment 3

[0102] Example 3: Preparation of cross-linked polymer film by constant voltage method: a standard three-electrode system was used, that is, ITO spin-coated with a polymer film was used as a working electrode; silver / silver ion electrode was used as a reference; platinum wire was used as a counter electrode. The electrolytic solution is an acetonitrile solution of tetrabutylammonium perchlorate with a concentration of 0.1 mole per liter. The voltage selection is 0.8 volts. Select 400 seconds as the power-on time. After energizing, wash the ITO electrode three times with acetonitrile and water respectively, and then put it in a vacuum drying oven at 120 degrees Celsius for 4 hours to obtain a cross-linked polymer film prepared by a constant voltage method.

[0103] Both of the above crosslinking methods can be used Figure 8 The flow representation shown.

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Abstract

The invention relates to preparation of an electrochemical crosslinking type high-performance electrochromic film and a material, and aims at solving the problems that a high-performance non-conjugated electrochromic polymer is tedious in preparation step, high in raw material cost, complex in processing technology and the like, starting from the aspects of molecular design and preparation technology, a non-conjugated polymer capable of being electrochemically crosslinked is selected, and the high-performance non-conjugated electrochromic film is prepared. A stable polymer cross-linked network, namely a brand-new cross-linked polymer electrochromic film, is constructed on a conductive substrate through an electrochemical method. On one hand, the conjugated structure of a polymer color-changing group is enlarged through electrochemical crosslinking, so that the initial oxidation potential is reduced; and on the other hand, the stable cross-linked network also reduces the damage of the electrochemical doping process to the stability of the film. Therefore, the film obtained by the method is simple to prepare and extremely easy to industrialize; and the material has good cycling stability. Through verification, the material has a wide application prospect in the photoelectric fields of electrochromism, supercapacitors, information storage and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method and material of a class of electrochemically cross-linkable electrochromic non-conjugated polymers and thin films. Background technique [0002] Electrochromism refers to the phenomenon that the inherent optical properties of materials undergo reversible changes under the action of an applied electric field. This kind of material can not only undergo a significant change in appearance color after an applied voltage is applied, but also can maintain this color change state for a long time and firmly after the voltage is removed. Based on this feature, electrochromic materials have been widely used and researched in many fields such as smart windows, anti-glare rearview mirrors, non-backlit displays, information storage, and military camouflage; at the same time, because of their color-changing mechanism, they have significant energy stora...

Claims

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Application Information

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IPC IPC(8): C03C17/38C03C17/28C03C17/32C08G65/40C08J7/04C08J7/12H01G11/56H01G11/58G02F1/1516
CPCC03C17/38C03C17/28C03C17/32C08G65/4031C08J7/0427C08J7/12H01G11/56H01G11/58G02F1/15165Y02E60/13
Inventor 陈峥王琦琳马杰润姜振华邢真
Owner JILIN UNIV
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