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Polymer films based on cross-structured conjugated molecules and their preparation methods and applications

A technology of polymer film and conjugated molecules, which is applied in polymer films based on cross-structured conjugated molecules and its preparation and application, can solve the problems of low optical contrast, poor film-forming property, and poor performance, and achieve high optical quality. Effects of contrast, fast response speed, and stable electrochemical activity

Active Publication Date: 2019-01-08
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, these D-A polymers based on linear structure conjugated molecules have poor performance as electrochromic materials in general, mainly in poor film-forming properties, single color, slow response speed, and low optical contrast.

Method used

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  • Polymer films based on cross-structured conjugated molecules and their preparation methods and applications
  • Polymer films based on cross-structured conjugated molecules and their preparation methods and applications
  • Polymer films based on cross-structured conjugated molecules and their preparation methods and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The cross-conjugated molecules as shown below are used as polymerized monomers:

[0040]

[0041] Preparation of polymer films:

[0042] (1) Preparation of monomer solution: 1mM, 10ml, the solvent used is dichloromethane / acetonitrile (volume ratio 7 / 3), the electrolytic salt is tetrabutylammonium hexafluorophosphate, the concentration is 0.1M.

[0043] (2) Electrochemical polymerization: cyclic voltammetry, the voltage range is 0-1.3v, the number of cycles is 10 cycles, and finally a thin layer of polymer film is obtained on the surface of the ITO glass.

[0044] The spectroelectrochemical performance characterization of the obtained polymer film: the electrolyte used is 0.2M lithium perchlorate / acetonitrile, and the electrochemical workstation is used in conjunction with a UV-visible spectrophotometer. The test results are as follows figure 1 , figure 2 shown.

Embodiment 2

[0046] The cross-conjugated molecules as shown below are used as polymerized monomers:

[0047]

[0048] Preparation of polymer films:

[0049] (1) Preparation of monomer solution: 1mM, 10ml, the solvent used is dichloromethane / acetonitrile (volume ratio 7 / 3), the electrolytic salt is tetrabutylammonium hexafluorophosphate, the concentration is 0.1M.

[0050] (2) Electrochemical polymerization: cyclic voltammetry, voltage range 0v-1.1v, cycle times 10 cycles, and finally a thin layer of polymer film is obtained on the surface of ITO glass.

[0051] The spectroelectrochemical performance characterization of the obtained polymer film: the electrolyte used is 0.2M lithium perchlorate / acetonitrile, and the electrochemical workstation is used in conjunction with a UV-visible spectrophotometer. The test results are as follows image 3 , Figure 4 shown.

Embodiment 3

[0053] The cross-conjugated molecules as shown below are used as polymerized monomers:

[0054]

[0055] Preparation of polymer films:

[0056] (1) Preparation of monomer solution: 1mM, 10ml, the solvent used is dichloromethane / acetonitrile (volume ratio 7 / 3), the electrolytic salt is tetrabutylammonium hexafluorophosphate, the concentration is 0.1M.

[0057] (2) Electrochemical polymerization: cyclic voltammetry, voltage range 0v-1.1v, cycle times 10 cycles, and finally a thin layer of polymer film is obtained on the surface of ITO glass.

[0058] The spectroelectrochemical performance characterization of the obtained polymer film: the electrolyte used is 0.2M lithium perchlorate / acetonitrile, and the electrochemical workstation is used in conjunction with a UV-visible spectrophotometer. The test results are as follows Figure 5 , Figure 6 shown.

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Abstract

The invention provides a polymer thin film based on cross structure conjugated molecules. According to a preparation method, in a three-electrode system, ITO glass is taken as a working electrode, a platinum wire electrode is taken as an auxiliary electrode, an Ag / AgCl electrode is taken as a reference electrode, a polymer monomer and a supporting electrolyte are dissolved in an electrodissolvent to prepare a mixed solution as an electrolyte, and electrochemical polymerization is carried out so as to obtain the polymer thin film based on the cross structure conjugated molecules. The polymer thin film can be applied in electrochromic devices as an electrochromism active material; compared with D-A type polymers based on linear structure conjugated molecules reported in the prior art, the polymer thin film possesses advantages such as higher response speed, higher optical contrast ratio, and more stable electrochemical activity, can be used for preparing parts via electrochemistry film forming, and can be applied in the fields such as flexible displays, energy-saving windows, and automobile rearview mirrors.

Description

(1) Technical field [0001] The invention relates to a polymer film based on cross-structure conjugated molecules, a preparation method thereof, and an application as an electrochromic material. The polymer film is suitable for fields such as displays, electronic paper, smart windows, and automobile rearview mirrors. (2) Background technology [0002] Electrochromism refers to the phenomenon that the optical properties of materials (including transmittance, absorptivity and reflectivity, etc.) occur within the visible wavelength range due to redox reactions or injection or extraction of charges (electrons or ions) under the action of an external electric field. Reversible transformation, its macroscopic performance is that the color of the material changes reversibly with the action of an applied electric field. Electrochromic materials are mainly divided into inorganic electrochromic materials and organic electrochromic materials, among which polymer electrochromic materials...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G61/12
CPCC08G61/126C08G2261/11C08G2261/18C08G2261/3241C08G2261/3246C08G2261/54Y02P20/54
Inventor 张诚闫拴马李维军戴玉玉陈澜曲星星
Owner ZHEJIANG UNIV OF TECH