Preparation method of electrochromic device for polyaniline conductive fabric

Abstract

The invention relates to the field of electrochromic materials, in particular to a preparation method of an electrochromic device for polyaniline conductive fabric. The preparation method comprises the following steps that an indium tin oxide film is soaked first in an ethanol solution and then in deionized water for ultrasonic treatment, and then the indium tin oxide film is blown to be dry by nitrogen; a polyaniline emulsion is applied to the conductive surface of the indium tin oxide film, and after the indium tin oxide film is dried, the surface of the indium tin oxide film, which is applied with the polyaniline emulsion, is applied with a polymethyl methacrylate gel electrolyte; and the surface of the indium tin oxide film, which is applied with the polymethyl methacrylate gel electrolyte, is bonded with conductive fabric to be sealed and dried, and then the electrochromic device is obtained. The electrochromic device is composed of four parts, an original ion storage layer and a conductive layer are replaced by the conductive fabric, the structure is optimized, and the electrochromic device has the advantages of high color reversible change and color change sensitivity, high chemical stability, good softness and wide application range. The polyaniline emulsion used by the preparation method can be directly used and has good dispersibility, and a stable and uniform film can be formed on the surface of the indium tin oxide film.

Description

technical field [0001] The invention relates to the field of electrochromic materials, in particular to a method for preparing an electrochromic device of polyaniline conductive fabric. Background technique [0002] Polyaniline (PANI) is a synthetic macromolecular compound, because its main chain contains alternating benzene rings and nitrogen atoms, thus forming a special conductive polymer material. Conjugated macromolecular polyaniline is in an intermediate oxidation state, that is, when the number of oxidation units is equal to the number of reduction units, it can become a conductor after being doped with a protonic acid. Unlike the doping of other conductive polymers, the protons of polyaniline Acid doping does not change the number of electrons on the main chain, only the protons enter the main chain of the polymer to make the chain positively charged. In order to maintain electrical neutrality, anions also enter the main chain of the polymer, and its conductivity is ...

AI Technical Summary

Problems solved by technology

However, due to the extremely poor solubility of polyaniline in common solvents, its processability is greatly limited.

Among the current methods for preparing electrochromic materials using polyaniline, the electrochemical polymerization method cannot prepare electrochromic films on a large scale, and the adhesion between the polyaniline film and the conductive glass substrate is poor, and the mechanical properties of the film are relatively poor; The method has a great influence on the film-forming and electrochromic properties of substrates of different materials; the preparation of polyaniline by the ordinary emulsion method needs to go through complicated post-treatment processes such as demulsification, filtration, washing, solvents, and film production, which not only reduces the production cost has increased, and is not conducive to large-scale production

[0004] Patent application number: 201210087341.8, patent name: a preparation method of polyaniline composite electrochromic membrane device, in this patent application, when polymerized polyaniline is prepared by emulsion method, dodecylbenzenesulfonic acid and Emulsify with distilled water, then add polyvinyl alcohol hydrosol and stir, then add aniline monomer, because polyvinyl alcohol is relatively viscous, and it is not easy to stir evenly, which will cause uneven distribution of polyvinyl alcohol in the solution and affect the quality of polyaniline

[0005] In the present invention, the method of combining the electrochromic properties of polyaniline conductive materials with fabrics to make electrochromic devices has not been reported, and the polyaniline emulsions obtained by the synthesis reaction are all utilized without causing secondary pollution

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