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

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

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

Examples

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Effect test

Embodiment 1

[0052] Prepare 50ml of sulfuric acid mixed solution of aniline and diphenylamine (20:80 in molar ratio) with a concentration of 0.5M, add 100ml of 0.1M potassium salt of polytoluenesulfonate, and gold-plate the polyolefin porous battery diaphragm (4cm×4cm) as the substrate, Pt as the counter electrode, saturated Ag / AgCl - As a reference electrode, a constant voltage of 0.8v was deposited for 40 minutes to prepare an electrochromic layer of about 6um. Dissolve 10g of polyacrylonitrile and 10g of lithium trifluoromethanesulfonate in a mixed solution of dimethyl carbonate and acetone, prepare a 0.1M mixed solution, and spray it on a glass substrate coated with a gold electrode 2 to obtain an electrolyte layer 3. The electrochromic coating of glass / gold / lithium trifluoromethanesulfonate (polyacrylonitrile) / polyolefin support layer / polyaniline / gold auxiliary electrode / polyester is prepared by multilayer composite method. Applying a positive voltage of 2v, the coating changes from...

Embodiment 2

[0054] Dissolve polyaniline, a soluble conductive polymer solution, in solvents such as m-cresol and methylpyrrolidone, and prepare a 0.1M solution, add 0.01M camphorsulfonic acid, grind and disperse evenly, and spray a 2.8um electrodeposited film on the porous gold support layer. Color-changing active layer; mix 10g polyvinylidene fluoride, 20g perchloric acid, 5g [emim]BF 4 Dissolve in a mixed solution of dimethyl carbonate and tetrahydrofuran, prepare a 0.2M mixed solution, spray on the surface of the gold-plated polyimide film, and solidify to obtain the electrolyte layer 3 . The electrochromic coating of polyimide / gold / perchloric acid (polyvinylidene fluoride) / porous gold film / polyaniline / gold auxiliary electrode / polyethylene is prepared by multilayer composite method. Apply 1.2v, -0.8v voltage, the device changes from dark green to golden, and then dark green. At the same time, the emissivity changes from 0.46 to 0.07, and then to 0.4. Solar Spectral Reflectance change...

Embodiment 3

[0056] Add 100ml of 0.2M lithium perchlorate to 50ml of sulfuric acid mixed solution with a concentration of 0.1M 3,4-ethylenedioxythiophene, use gold-plated aluminum oxide porous membrane as substrate, Pt as counter electrode, saturated Ag / AgCl - As a reference electrode, a constant voltage of 0.8v was deposited for 120min to prepare a 5um electrochromic layer. 10 g of polyvinylidene fluoride 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 gold-plated polyimide and cured to obtain an electrolyte layer 3 . Polyimide / gold / lithium perchlorate (polyvinylidene fluoride) / aluminum oxide support layer / poly(ethylenedioxythiophene) / gold auxiliary electrode / polyethylene electrode was prepared by multilayer composite method. Photochromic coating. Applying a positive voltage of 1.8v, the coating changes from dark blue to light blue, the emissivity changes from 0.46 ...

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Abstract

The invention discloses a variable emissivity and variable reflectivity electrochromic intelligent thermal control coating and a preparation method. Due to the adoption of conductive polymer advanced doping control and multi-layer composite photoelectric matching ways, initial electrochromic voltage is effectively reduced, and variation ranges of reflectivity and emissivity of an electrochromic active layer are widened. The prepared electrochromic coating adopts DC drive, ensures the driving voltage of lower than 2V, and has the reflectivity variations of more than 0.4 and the emissivity variations of more than 0.25; and after positive and negative 100-DC temperature alternation is performed on the coating for 100 times, the reflectivity and emissivity variations of the coating still meetthe indexes, so the coating substantially satisfies the needs of aerospacecrafts in intelligent thermal control.

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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