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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 difficulty in commercial production, low stability, high production cost of electrochromic glass windows, etc., to achieve a stable color change range and a wide range of color changes And the effect of life improvement and stability improvement

Inactive Publication Date: 2009-10-28
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

The invention relates to a method for improving the performance of a sandwich type electrochromic glass window. The invention includes an electrochromic layer, an ion storage coating and an electrolyte between the electrochromic layer and the ion storage coating; the characteristic is that the electrolyte adopts a silicon-oxygen chain to form a skeleton structure, and the alkali metal ions are conductive ions. Water or water-like substances are added to the electrolyte, and the content is from 0.001% to 20% by mass. The present invention improves the ion storage capacity of the ion storage coating and improves the discoloration capacity of the electrochromic coating at the same time by adding water or modifying the electrolyte with lithium as the conductive ion by using inorganic-organosilicon as the precursor and modifying the electrolyte with water-like substances. method.

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. It is produced by the applied v...

Claims

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Application Information

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