Functional hydrogel-based electrochromic device and preparation method thereof

An electrochromic device and electrochromic technology are applied in the directions of instruments, nonlinear optics, optics, etc., which can solve the problems of complex devices and non-environmental protection, and achieve the effects of simple preparation process, simple structure and simple preparation.

Active Publication Date: 2019-01-04
上海鼎弈材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] To sum up, the existing problems in the prior art are: the prior art uses benzoquinone as the electrocaustic base and the alkali-induced chromic molecule to combine the preparation of devices is complex, and uses organic solvents, which is not in line with the concept of environmental protection

Method used

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  • Functional hydrogel-based electrochromic device and preparation method thereof
  • Functional hydrogel-based electrochromic device and preparation method thereof
  • Functional hydrogel-based electrochromic device and preparation method thereof

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preparation example Construction

[0031] Such as figure 1 As shown, the preparation method of the functional hydrogel-based electrochromic device provided by the embodiment of the present invention includes the following steps:

[0032] S101: Using acrylamide as monomer, N,N-dimethylbisacrylamide as crosslinking agent, ammonium persulfate as thermal initiator, 4-hydroxy-2,2,6,6-tetramethylpiperidine oxidation The polyacrylamide hydrogel was prepared using the compound as a catalyst;

[0033] S102: adding a solution containing electrolytes, electro-alkali, and alkali-responsive molecules to the hydrogel at room temperature, and absorbing it by the swelling effect of the hydrogel to obtain a functionalized hydrogel;

[0034] S103: The hydrogel is sandwiched between two ITO glass electrodes to obtain an electrochromic device based on a functional hydrogel.

[0035] The preparation method of the functional hydrogel-based electrochromic device provided by the embodiment of the present invention specifically inclu...

Embodiment 1

[0044] The embodiment of the present invention prepares an electrochromic device that can be reversibly switched between yellow and green, including;

[0045] Step 1, preparation of polyacrylamide hydrogel: 2.2mol / L acrylamide was dissolved in 5mL deionized water, and 6*10 -4 Acrylamide quality of N,N-dimethylbisacrylamide, 1.7*10 -3 Ammonium persulfate of acrylamide quality was stirred to dissolve, and then nitrogen gas was bubbled for 5 minutes to remove oxygen in the solution. Then add 2.5*10 -3 4-hydroxy-2,2,6,6-tetramethylpiperidine oxide of acrylamide quality, put the obtained solution into a vacuum oven, heat and polymerize at 60°C for 12h. After washing several times with deionized water to remove residual acrylamide monomers, a colorless and transparent polyacrylamide hydrogel was obtained.

[0046] Step 2, the configuration of the aqueous solution with electrochromic function: weigh 10 -2 mol / L benzoquinone, 2*10 -2 mol / L of 4-OH-Tempo, 2*10 -3 mol / L alkali res...

Embodiment 2

[0052] The embodiment of the present invention prepares an electrochromic device that can be reversibly switched between yellow and red, including;

[0053] Step 1, preparation of polyacrylamide hydrogel: 2.2mol / L acrylamide was dissolved in 5mL deionized water, and 6*10 -4 Acrylamide quality of N,N-dimethylbisacrylamide, 1.7*10 -3 Ammonium persulfate of acrylamide quality was stirred to dissolve, and then nitrogen gas was bubbled for 5 minutes to remove oxygen in the solution. Then add 2.5*10 -3 4-hydroxy-2,2,6,6-tetramethylpiperidine oxide of acrylamide quality, put the obtained solution into a vacuum oven, heat and polymerize at 60°C for 12h. After washing several times with deionized water to remove residual acrylamide monomers, a colorless and transparent polyacrylamide hydrogel was obtained.

[0054] Step 2, the configuration of the aqueous solution with electrochromic function: weigh 10 -2 mol / L benzoquinone, 2*10 -2 mol / L of 4-OH-Tempo, 2*10 -3 mol / L alkali respo...

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Abstract

The invention belongs to the technical field of electrochromic devices, and discloses a functional hydrogel-based electrochromic device and a preparation method thereof. The method comprises the following steps: using acrylamide as a monomer, N,N-dimethylbisacrylamide as a cross-linking agent, ammonium persulfate as a thermal initiator, 4-hydroxy-2,2,6,6-tetramethylpiperidine oxide as a catalyst to prepare polyacrylamide hydrogel; adding a solution having electrolyte, electro-alkali, and base-responsive molecules to the hydrogel at room temperature, and adsorbing the solution by the swelling action of the hydrogel to obtain a functionalized hydrogel; and sandwiching the hydrogel between two ITO glass electrodes to obtain a functional hydrogel-based electrochromic device. The functional hydrogel-based electrochromic device and the preparation method thereof are simple in preparation process, mild in working condition, use water as a solvent to reduce the harm to the human body, which isenvironmentally friendly, good in reproducibility, and very suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of electrochromic devices, and in particular relates to an electrochromic device based on functional hydrogel and a preparation method thereof. Background technique [0002] At present, the commonly used existing technologies in the industry are as follows: with the development of science and technology and the improvement of human living standards, people have higher and higher requirements for living comfort and interior decoration. The smart electrochromic window means that the color and transparency of the glass will change reversibly under the stimulation of a certain voltage. When this kind of window is in use, it can dynamically adjust the intensity of light entering the building to provide people with a comfortable life. environment, and can adjust the indoor temperature. In today's society, most of the energy consumed by temperature regulation is used, and the use of electrochromic windows can redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/15C08F220/56C08F222/38
CPCC08F220/56G02F1/15C08F222/385
Inventor 张宇模杨国坚张晓安
Owner 上海鼎弈材料科技有限公司
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