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Variable-emissivity variable-reflectivity electrochromic intelligent thermal control coating and preparation method thereof

An electrochromic and thermal control coating technology, which is applied in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve the problems of less research on the reflectivity and emissivity changes of intelligent thermal control coatings, etc. Achieve the effect of meeting the needs of intelligent thermal control, short response time, and degrading potential barriers

Active Publication Date: 2011-09-07
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the above studies use electrochemical oxidation polymerization or vacuum coating to prepare color-changing materials suitable for anti-glare of civil vehicles. There are relatively few studies on the change of emissivity and emissivity, especially for large-area, flexible, and more promising spraying processes, which have not been mentioned yet.

Method used

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  • Variable-emissivity variable-reflectivity electrochromic intelligent thermal control coating and preparation method thereof
  • Variable-emissivity variable-reflectivity electrochromic intelligent thermal control coating and preparation method thereof
  • Variable-emissivity variable-reflectivity electrochromic intelligent thermal control coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Prepare 100ml of sulfuric acid mixed solution of aniline and diphenylamine (molar ratio is 4:96) with a concentration of 0.2M, add 100ml of 0.2M potassium salt of polytoluenesulfonate, conduct electricity with 0.2mm indium tin oxide (ITO) Membrane (4cm×4cm) as the substrate, Pt as the counter electrode, saturated Ag / AgCl - As a reference electrode, a constant voltage of 0.5v was deposited for 30 minutes to prepare a 5um electroactive color-changing layer 5 . 10 g of polyacrylonitrile and 10 g of lithium perchlorate were dissolved in a mixed solution of dimethyl carbonate and acetone to prepare a 0.1 M mixed solution, which was sprayed on the surface of the electrochromic active layer 5 to obtain the electrolyte layer 3 . Composite multilayer film with polyester substrate and gold auxiliary electrode to prepare a six-layer all-solid-state electrochromic coating of polyester / ITO / polyaniline / lithium perchlorate (polyacrylonitrile) / gold electrode / polyester [Structure 1]. ...

Embodiment 2

[0080] 10g polyacrylonitrile, 20g lithium perchlorate, 5g [emim] BF 4 Dissolve in a mixed solution of dimethyl carbonate and tetrahydrofuran, prepare a 0.1M mixed solution, and spray it on the gold-plated glass substrate of the preset auxiliary gold electrode (7) to obtain the electrolyte layer 3; the soluble conductive polymer solution polyaniline Dissolve in m-cresol, methylpyrrolidone and other solvents, prepare 0.1M solution, add 0.01M camphorsulfonic acid, grind and disperse evenly, and then spray on the surface of the electrolyte layer to prepare a 1um electrochromic active layer; Methods The electrochromic coating of polyethylene / polyaniline / lithium perchlorate (polyacrylonitrile) / gold electrode / glass was prepared. Applying a positive voltage of 3v, the coating changes from dark green to light green, the emissivity changes from 0.48 to 0.14, and the solar spectral reflectance changes from 0.1 to 0.5.

Embodiment 3

[0082] Prepare 50ml of a sulfuric acid mixed solution with a concentration of 0.1M 3,4-ethylenedioxythiophene, add 100ml of 0.2M lithium perchlorate, and use a 0.2mm indium tin oxide (ITO) conductive film (4cm×4cm) as the substrate , Pt is the counter electrode, saturated Ag / AgGl - As a reference electrode, a constant voltage of 0.8v was deposited for 60 minutes to prepare a 2um electrochromic active layer 5 . 10 g of polyacrylonitrile and 10 g of lithium perchlorate were dissolved in a mixed solution of dimethyl carbonate and acetone to prepare a 0.1 M mixed solution, which was sprayed on the surface of the electrochromic active layer 5 to obtain the electrolyte layer 3 . Composite multilayer film with polyester substrate and gold auxiliary electrode to prepare a six-layer all-solid-state electrochromic coating of polyester / ITO / polythiophene / lithium perchlorate (polyacrylonitrile) / gold electrode / polyester . Applying a positive voltage of 1.2v, the coating changes from dark ...

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Abstract

The invention discloses a variable-emissivity variable-reflectivity electrochromic intelligent thermal control coating and a preparation method thereof. In the method, a conductive macromolecule predoping control and multi-layer compound photoelectricity matching mode is adopted, thus the electrochromism initial voltage is effectively reduced, and the change range of the reflectivity and emissivity of an electrochromic active layer is improved. The manufactured electrochromic coating is driven by the direct current, the driving voltage is less than 2V, the reflectivity change is more than 0.4, and the emissivity change is more than 0.25; and the reflectivity change and emissivity change of the coating further meet the indexes after 100 times of positive-negative temperature exchange at 100 DEG C, thereby basically meeting the intelligent thermal control requirement of an aero spacecraft.

Description

technical field [0001] The invention relates to an electrochromic conductive polymer thermal control coating with variable emissivity and variable reflectance and a preparation method thereof, belonging to the technical field of intelligent thermal control coating preparation. Background technique [0002] The thermal control coating material is the key material to realize the safe operation of the spacecraft exposed to sunlight for a long time or in space where sunlight cannot reach, and to ensure the effective regulation of the temperature in the cabin. The solar spectrum reflection characteristics or infrared emission characteristics of traditional thermal control coatings are fixed and cannot change with changes in ambient temperature, making it difficult to meet the adaptive temperature control requirements of spacecraft on the front and back of the sun. The electrochromic thermal control coating material with adjustable reflectivity and emissivity just makes up for the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/153B32B27/06
Inventor 卢鹉孙明明史建中曾一兵李颖罗正平詹磊付大光李季王献红
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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