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A kind of preparation method of stretchable flexible electrochromic film

An electrochromic and chromogenic technology, which is applied in the fields of fine chemical industry and material science, can solve the problems of difficult to meet the demand, single purpose, difficult to quickly recover deformation, etc., and achieve good stretch recovery, fast electrical response speed, and color contrast. high effect

Active Publication Date: 2021-07-27
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This color-changing film is single-purpose and difficult to meet the current demand for wearable electronics
In addition, the flexible electrochromic film in the current research is difficult to quickly recover the deformation after being deformed by force, and does not have stretch recovery.
This problem also seriously affects the stability of electrochromic products and the performance of wearable textiles, restricting the development of electrochromic materials in the field of wearable electronics

Method used

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  • A kind of preparation method of stretchable flexible electrochromic film
  • A kind of preparation method of stretchable flexible electrochromic film
  • A kind of preparation method of stretchable flexible electrochromic film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 5mg 2'-chloro-6'-(diethylamino)fluorane, 0.5g tetrabutylammonium perchlorate (TBAP), 3.5g hydroxypropyl acrylate to 1g propylene carbonate solution, and sonicate for 10 minutes, a clear mixed solution was obtained. Add 80 μl of azobisisoheptanonitrile initiator, stir for 5 minutes, pour into a glass petri dish, vacuumize at room temperature for 10 minutes, then heat up to 60°C for vacuum polymerization for 2 hours, take it out and cool to room temperature to obtain a colorless transparent film . The transmittance of the color-changing film is 92%, the stretching strain can reach 300%, and the stretching recovery rate is 95%. It can develop color when driven by 3V voltage, and it can maintain a stable state for 5 days after the voltage is removed.

Embodiment 2

[0029] 0.2 g of polymethyl methacrylate was added to 1 g of propylene carbonate, and left at 90° C. for 24 hours to dissolve to obtain a gel solution. Take out and cool to room temperature, add 5mg 2'-chloro-6'-(diethylamino)fluorane, 0.5g tetrabutylammonium perchlorate (TBAP), 3mgN,N-methylenebisacrylamide, 3.3g acrylic acid Hydroxypropyl ester, sonicated for 10 min to obtain a clear mixed solution. Add 80 μl of azobisisobutyronitrile initiator, stir for 5 minutes, pour into a glass petri dish, vacuumize at room temperature for 10 minutes, then heat up to 70°C for vacuum polymerization for 2 hours, take it out and cool to room temperature to obtain a colorless transparent film . The transmittance of the color-changing film is 94%, the stretching strain can reach 300%, and the stretching recovery rate is 98%. It can develop color when driven by 3V voltage, and it can maintain a stable state for 6 days after the voltage is removed.

Embodiment 3

[0031] 0.2 g of polymethyl methacrylate was added to 1 g of propylene carbonate, and left at 90° C. for 24 hours to dissolve to obtain a gel solution. Take it out and cool it to room temperature, add 5mg 2'-chloro-6'-(diethylamino)fluorane, 0.5g tetrabutylammonium perchlorate (TBAP), 3.3g hydroxypropyl acrylate, and ultrasonicate for 10 minutes to obtain clarification mixed solution. Add 100 μl of an aqueous solution containing 15 mg of ammonium persulfate, stir evenly, 10 μl of tetramethylethylenediamine, stir for 5 minutes, pour into a glass petri dish, vacuumize at room temperature for 10 minutes, then heat up to 50°C for vacuum polymerization for 2 hours, Take it out and cool it to room temperature to obtain a substantially colorless transparent film. The transmittance of the color-changing film is 92%, the stretching strain can reach 450%, and the stretching recovery rate is 98%. It can develop color when driven by 4V voltage, and it can maintain a stable state for one ...

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Abstract

The invention discloses a preparation method of a stretchable flexible electrochromic film, which belongs to the technical fields of fine chemical industry and material science. The method is to mix the electrolyte, the color-changing dye, the organic monomer and the solvent, then add the initiator, stir and form a film to obtain a stretchable flexible electrochromic film; the organic monomer includes acrylamide, N-hydroxy Methacrylamide, hydroxyethyl acrylate, hydroxypropyl acrylate, methyl acrylate, ethyl acrylate, butyl acrylate, isooctyl acrylate, N,N-methylenebisacrylamide and polyethylene glycol diacrylate one or more of . The color-changing film prepared by this method not only has the characteristics of fast electrical response speed and high color contrast, but also has good tensile recovery, the tensile strain can reach 500%, and the tensile recovery rate is 98.0%, which can meet people's expectations. Diversified demand for wearable electronic products.

Description

technical field [0001] The invention relates to a preparation method of a stretchable and flexible electrochromic film, which belongs to the technical fields of fine chemical industry and material science. Background technique [0002] At present, smart wearable electronic products are emerging high-tech products with huge market potential, and have broad application prospects in anti-counterfeiting packaging, medical, sensors, textiles and other fields. The materials involved in wearable electronic products are required to have good mechanical properties, that is, they can maintain their original properties without performance degradation after being subjected to external forces; at the same time, materials are required to respond quickly to electrical signals and can be visualized macroscopically. The color change of shows the microscopic response data as best. Therefore, fast-response electrochromic flexible film materials are an integral part of wearable electronics. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/20C08F265/06C08F220/20C08F222/38C08K5/17C08L33/14C08L51/00C08J5/18A41D1/00A41D27/08A41D27/00
CPCA41D1/00A41D27/00A41D27/08C08F120/20C08F220/20C08F265/06C08J5/18C08J2333/14C08J2335/00C08J2351/00C08K5/17C08F222/385
Inventor 付少海张丽平李加双田安丽
Owner JIANGNAN UNIV