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Method for preparing electrochromism glass windows in sandwich type

An electrochromic and electrochromic layer technology, applied in the field of glass processing, can solve the problems of high production cost of electrochromic glass windows, difficult to put into commercial production, low stability, etc., and achieves stable discoloration range and discoloration range. And the effect of life improvement and stability improvement

Inactive Publication Date: 2006-12-06
孙冬兰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Color-changing materials are widely valued because environmental changes can sustainably but reversibly change the optical properties of the material itself, including transmittance, refractive index and absorptivity. Currently developed color-changing materials include photochromic, thermochromic, piezochromic And electrochromic, etc. But from the perspective of controllable operation, electrochromic has great initiative, it can be changed at any time according to people's preferences and subjective wishes, which is different from photochromic, thermochromic, etc. It is in stark contrast to the passive acceptance of environmental changes. Technically speaking, electrochromic materials are the most potential for development. It is produced by the applied voltage or current, more precisely, through the bidirectional injection of electrons and ions. And reversible optical properties change, and maintain this state when the power is turned off until the opposite voltage or current is applied. Automobile rearview mirrors and car roofs made of electrochromic principles have been commercialized in the 1990s, which shows The feasibility of its use as architectural glass. If the electrochromic glass window is commercialized, it will save air-conditioning costs in summer and heating costs in winter, and at the same time complete indoor lighting control and temperature adjustability. At present, the preparation of electrochromic glass Due to the use of vacuum technology, such as sputtering, etc., the production cost of electrochromic glass windows is very high, and it is difficult to put them into commercial production. The electrochromic glass developed by the German Institute of New Materials uses sol-gel technology to prepare electrochromic glass (invention patent WO 95 / 28663; April 18, 1994), although the production cost is reduced, the service life of the product is only about 10,000 cycles, and the stability is not high. The discoloration range of the glass window is a gradual process in the initial 2,000 cycles. After 2000 laps, the range of discoloration gradually decreases

Method used

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  • Method for preparing electrochromism glass windows in sandwich type

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047]First, mix 1 mole of γ-glycidyl ether propyltrimethylsilane with 0.2 moles of tetramethoxysilane, add 60 grams of hydrochloric acid with a molar concentration of 0.1, and stir the mixture at 30°C for 24 hours. The resulting methanol Separation by rotary vacuum distillation at 60°C.

[0048] Mix 1 mole of pre-hydrolyzed γ-glycidyl ether propyl trimethoxysilane with 1.5 moles of ethylene glycol, add 0.1 moles of methylimidazole, stir at 30°C for 60 minutes, add 0.65 moles of lithium perchlorate and stir well, Adjust the pH to 8.0.

[0049] Add 10% distilled water to this electrolyte before use.

[0050] The electrolyte is suitable for all electrochromic devices using inorganic oxides as electrochromic coatings and ion storage coatings.

Embodiment 2

[0052] A: Preparation of tungsten oxide coating

[0053] The tungsten oxide coating is made of pre-treated conductive glass, that is, pre-cleaned conductive glass, with a thickness of 4 mm and an area resistance of 17 ohms / □. It is prepared from tungsten oxide sol by dipping and pulling. The tungsten oxide sol is mixed with 30% hydrogen peroxide aqueous solution and insufficient tungsten powder, and the reactor is kept in a water bath at 10°C. After the reaction is over, add 8 ml of ethanol per gram of tungsten, stir at 20°C for 2 hours, and rotate to evaporate to obtain dry tungsten oxide powder. Dissolve in ethanol at 25% to obtain tungsten oxide sol.

[0054] Using the dipping and pulling method at a pulling speed of 10 mm per second, coating the conductive glass in a constant temperature and constant humidity environment of 20° C. and 30% humidity, and heat-treating at 200° C. for 1 hour.

[0055] B: Preparation of non-discoloration ion storage coating

[0056] The non-d...

Embodiment 3

[0065] A: The preparation of the tungsten oxide coating is the same as in Example 2, except that the tungsten trioxide sol is 10% ethanol sol. Using the dipping and pulling method at a pulling speed of 4 mm per second, coating the conductive glass in a constant temperature and constant humidity environment of 15° C. and 5% humidity, and heat-treating it at 80° C. for 1 hour.

[0066] C: Preparation of Electrolyte

[0067] Mix 1 mole of vinyltrimethoxysilane with 0.01 mole of tetraethoxysilane, add 20 grams of hydrochloric acid with a molar concentration of 0.1, and stir the mixture at 30°C for 3 hours, and the generated methanol is reduced by rotating at 60°C. Autoclaved flow separation.

[0068] Mix 1 mole of pre-hydrolyzed vinyltrimethoxysilane with 0.01 mole of polyvinyl alcohol doped with 0.01 mole of lithium perchlorate, add 0.01 mole of aluminum isobutyrate, stir at 30°C for 60 minutes, and adjust the pH value to 4.0. This electrolyte was added with 0.001% distilled wa...

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Abstract

This invention relates to a method for improving the properties of sandwich electrochromic glazing window. The glazing window comprises an electrochromic layer, an ion-storing coating layer, and an electrolyte between them, wherein the electrolyte contains silicon-oxygen band skeleton structure and alkali metal as conductive ions. Water 0.001-20 wt. % is added to the electrolyte. This invention uses inorganic-organic silicon as the precursor and lithium electrolyte as conductive ions to improve the ion-storing capacity of the ion-storing coating layer and the electrochromic capacity of the electrochromic layer.

Description

technical field [0001] The invention belongs to the technical field of glass processing, in particular to a method for improving the performance of a sandwich type electrochromic glass window. Background technique [0002] Color-changing materials are widely valued because environmental changes can sustainably but reversibly change the optical properties of the material itself, including transmittance, refractive index and absorptivity. Currently developed color-changing materials include photochromic, thermochromic, piezochromic And electrochromic, etc. But from the perspective of controllable operation, electrochromic has great initiative, it can be changed at any time according to people's preferences and subjective wishes, which is different from photochromic, thermochromic, etc. It is in stark contrast to the passive acceptance of environmental changes. Technically speaking, electrochromic materials are the most potential for development. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C27/10C03C17/34C03C17/30C03C17/23
Inventor 孙冬兰
Owner 孙冬兰
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