阅读说明：本技术 一种应用于博物馆的电致变色橱窗 (Electrochromic show window applied to museum ) 是由 王雪晴 刘楠 吴月 康静怡 周全桂 汪浩 于 2020-07-06 设计创作，主要内容包括：一种应用于博物馆的电致变色橱窗,属于变色橱窗技术领域。将聚苯胺及三氧化钨结合制备电致变色薄膜,过滤闪光灯有害近红外光,起到保护文物且满足游客拍照需求,通过自由延长或缩短通电时间,也可调控变色深浅,控制可见光的透过率,改变橱窗温度。采用无机和有机材料相结合的方法制备电致变色薄膜,致使电致变色玻璃器件的颜色调控范围更加广泛,美观,由于工作电压低,功率小,可循环使用,也可以到达绿色节能的效果。(An electrochromic show window applied to a museum belongs to the technical field of the electrochromic show window. The polyaniline and the tungsten trioxide are combined to prepare the electrochromic film, harmful near infrared light of a flash lamp is filtered, cultural relics are protected, the requirement of tourists on photographing is met, the color changing depth can be adjusted and controlled by freely prolonging or shortening the electrifying time, the transmittance of visible light is controlled, and the temperature of a show window is changed. The electrochromic film is prepared by adopting a method of combining inorganic and organic materials, so that the color regulation and control range of the electrochromic glass device is wider and more attractive, and the electrochromic glass device can achieve the effects of green and energy saving due to low working voltage and low power and can be recycled.)

1. An electrochromic show window applied to a museum is characterized by comprising a double-pole double-throw switch (8), a transformer (9), electrochromic glass (10) and a power supply (11) protection resistor (12);

one side of the electrochromic glass (10) is used as an electrode A, two branch points led out by one lead are respectively an a end and a d end, and the other side of the electrochromic glass (10) is used as an electrode B, two branch points led out by one lead are respectively a B end and a c end; one pole of a power supply (11) is sequentially connected with a protective resistor (12), a transformer (9) and a double-pole double-throw switch (8) in series, namely two connecting ends of the double-pole double-throw switch (8) are connected with the series circuit, and the other two connecting m ends and the other two connecting n ends of the double-pole double-throw switch (8) can be respectively and correspondingly communicated with the b end of the a end or the d end of the c end; one is that the m end is connected with the a end, and the n end is connected with the b end; in the other case, the end m is connected with the end c, and the end n is connected with the end d;

the electrochromic glass (10) has the structure: plating a conductive layer on the glass to form ITO transparent conductive glass; the surface of the conducting layer A (3) of one ITO transparent conducting glass is parallel to the surface of the conducting layer B (4) of the other ITO transparent conducting glass, three layers of thin films are compounded between the conducting layer A (3) and the conducting layer B (4), and WO is sequentially and respectively arranged from the transparent conducting layer A (3) to the transparent conducting layer B (4)₃A cathode coloring layer (5), an electrolyte layer (6), and a polyaniline ion storage layer (7); the conducting layer A (3) and the conducting layer B (4) are Indium Tin Oxide (ITO).

2. An electrochromic show window for a museum according to claim 1, characterized in that the wires are led out from the conductive layer of indium tin oxide, respectively.

3. Electrochromic show window for museum applications according to claim 1, characterised in that two pieces of glass are provided on the outside of the transparent conducting layer a (3) and the transparent conducting layer B (4), respectively, forming corresponding ITO transparent conducting glass.

4. The method for preparing an electrochromic show window for a museum according to claim 1, wherein the method for preparing the electrochromic glass comprises the following steps:

(1) pretreatment of ITO transparent conductive glass

The ITO transparent conductive glass is sequentially washed by water and absolute ethyl alcohol for 5min in an ultrasonic mode, and finally is immersed into the absolute ethyl alcohol for standby;

(2) preparing WO on a conducting layer of ITO transparent conductive glass₃Layer(s)

(3) WO obtained in step (2)₃Preparation of polyaniline in layers

(4) Preparation of ion-conducting layer solution

Mixing lithium perchlorate, polypropylene carbonate, an ultraviolet curing agent and ethanol according to a proportion, wherein the dosage relationship is as follows: lithium perchlorate: polypropylene carbonate: ultraviolet curing agent: ethanol 4.05 g: 25 ml: 12.5 ml: 12.5ml, stirring for 12h for later use; the color fixing and the electric conduction functions are realized;

(5) package with a metal layer

Compounding the other piece of ITO transparent conductive glass with the ITO transparent conductive glass obtained in the step (3), wherein in the experimental stage, 3M double faced adhesive tape is selected to connect and fix the two pieces of ITO transparent conductive glass, the conductive layer solution in the step (4) is slowly injected into the gap formed by fixing the two pieces of ITO transparent conductive glass by 3M through a needle tube, the solution is slowly solidified under the irradiation of ultraviolet light, and the needle tube is drawn out after the solidification is carried out for 5min to form the conductive layer; and completing the preparation of the electrochromic glass.

5. The process according to claim 4, wherein step (2) is carried out to prepare WO₃Method for preparing WO by adopting electrodeposition method₃Firstly, weighing 12g of tungsten powder in a beaker, slowly pouring 44ml of 30% hydrogen peroxide in a small amount for multiple times, adding magnetons, stirring for 2-3h, adding 12ml of acetic acid to adjust the pH value of a solution to be acidic, adding 44ml of ethanol, and stirring for 12h in a fume hood; the solution is put into a centrifuge to obtain the preparation WO₃Electrolyte solution required by the film;

the experiment is a three-electrode system, a platinum sheet is used as a counter electrode, ITO glass is used as a working electrode, silver chloride is used as a reference electrode, electrolysis is carried out for 20min under the condition that the constant current is 0.75mA, and a product is repeatedly cleaned by deionized water and absolute ethyl alcohol, placed into an oven, dried for 24h and taken out for later use.

6. The method for producing a polyaniline according to claim 4, wherein the method for producing a polyaniline in step (3):

firstly, preparing an ethanol solution of sulfuric acid, mixing concentrated sulfuric acid and absolute ethanol, adding a certain amount of aniline monomer after stirring for a period of time, and stirring for a period of time, preferably at least 12 hours to obtain an electrodeposition PANI precursor solution;

the stress relation of the concentrated sulfuric acid, the absolute ethyl alcohol and the aniline monomer is as follows: concentrated sulfuric acid: anhydrous ethanol: aniline monomer 5.6 ml: 100 ml: 4.6 g;

the PANI precursor solution is selected to carry out electrodeposition, the experiment is a three-electrode system, a platinum sheet is used as a counter electrode, ITO glass is used as a working electrode, silver chloride is used as a reference electrode, electrolysis is carried out for 20min under the condition that the constant current is 0.75mA, the electrochemical deposition of the PANI electrochromic film is carried out on the surface of the ITO conductive glass, the product is repeatedly cleaned by deionized water and absolute ethyl alcohol, and the product is put into an oven and taken out for standby after being dried for 24 h.

7. Use of an electrochromic shop window according to any one of claims 1 to 3, characterised in that it comprises the following steps:

the voltage is reduced to the working voltage of the electrochromic glass by the transformer (9) and the on-off of the circuit is determined by the double-pole double-throw switch (8), so that the direction of the current passing through the electrochromic glass device is changed, the on-off time of the circuit can be manually controlled, the coloring degree of the electrochromic glass is adjusted, and the light transmittance is changed to realize the light and shade degree in the glass of the show window of the museum.

8. Use according to claim 7, characterized in that it comprises in particular the following steps:

(1) closing a double-pole double-throw switch and an a-end b-end, connecting the positive electrode of a power supply with a conductive layer, and connecting the negative electrode of the power supply with the conductive layer through a transformer and a resistor to gradually color; the electrifying time is 5s, and the film is completely changed into a colored state, namely dark blue, from a faded state, namely transparent or light yellow;

(2) the switch is switched off, so that the electrochromic glass has no current and the color is kept unchanged, and the color depth is determined by the length of the power-on time;

(3) manually changing the switch direction, closing the double-pole double-throw switch and the end d of the end c, namely applying reverse voltage, starting to fade the film from a colored state, wherein the electrifying time is about 4s, and the color of the electrochromic glass is lightened until the color of the electrochromic glass is faded;

(4) after the device is used, the switch is disconnected, the power supply is turned off, and the color can be kept unchanged in the fading state.

Technical Field

The invention belongs to the technical field of color-changing show windows, and particularly relates to an electrochromic show window applied to a museum.

Background

Along with the enhancement of cultural learning inheritance consciousness in China, more and more people walk into a museum to visit and learn, and in the process of visiting the museum, the cultural relics are shot by using the flash lamp to cause unrecoverable damage to the cultural relics.

Therefore, the application of the electrochromic glass on a museum display cabinet is proposed to reduce the damage to the cultural relics. The electrochromic glass can effectively absorb harmful near infrared light in a flash lamp, and has high absorption rate in a near infrared region with the wavelength of 800nm-1000 nm. The electrochromic glass is applied to the display cabinet, so that the damage of a flash lamp to cultural relics can be avoided, and the requirements of photographers are met.

In addition, the electrochromic glass display cabinet has a relatively intelligent color regulation and control range, the color of the electrochromic glass display cabinet can be regulated to a certain extent according to indoor light and the theme of a museum, and the electrochromic glass display cabinet has certain flexibility. The electrochromic window can manually and selectively adjust the radiation quantity in the display window by adjusting the transmittance of visible light and near infrared light waves, thereby changing the temperature, reducing the rest electric energy input and the operation cost, and achieving the purpose of saving energy.

Disclosure of Invention

The electrochromic show window applied to the museum mainly selects Indium Tin Oxide (ITO) transparent conductive glass.

The electrochromic show window applied to the museum is characterized by comprising a double-pole double-throw switch (8), a transformer (9), electrochromic glass (10) and a power supply (11) protection resistor (12);

one side of the electrochromic glass (10) is used as an electrode A, two branch points led out by one lead are respectively an a end and a d end, and the other side of the electrochromic glass (10) is used as an electrode B, and two branch points led out by one lead are respectively a B end and a c end; one pole (such as the positive pole or the negative pole) of the power supply (11) is sequentially connected with the protective resistor (12), the transformer (9) and the double-pole double-throw switch (8) in series, namely two connecting ends of the double-pole double-throw switch (8) are connected with the series circuit, and the other two connecting ends m and n of the double-pole double-throw switch (8) can be respectively and correspondingly communicated with the end b of the end a or the end d of the end c; one is that the m end is connected with the a end, and the n end is connected with the b end; in another case, the m terminal is connected with the c terminal, and the n terminal is connected with the d terminal.

The electrochromic glass (10) has the structure: plating a layer of conductive layer on the glass to form ITO transparent conductive glass; the surface of the conducting layer A (3) of one ITO transparent conducting glass is parallel to the surface of the conducting layer B (4) of the other ITO transparent conducting glass, three layers of thin films are compounded between the conducting layer A (3) and the conducting layer B (4), and WO is sequentially and respectively arranged from the transparent conducting layer A (3) to the transparent conducting layer B (4)₃A cathode coloring layer (5), an electrolyte layer (6), and a polyaniline ion storage layer (7); the conducting layer A (3) and the conducting layer B (4) are Indium Tin Oxide (ITO).

The wires are respectively led out from the indium tin oxide conducting layer.

Two pieces of glass are respectively arranged on the outer sides of the transparent conducting layer A (3) and the transparent conducting layer B (4) to form corresponding ITO transparent conducting glass.

The preparation method of the electrochromic glass is characterized by comprising the following steps of:

(1) pretreatment of ITO transparent conductive glass

The preparation method of the ITO transparent conductive glass is characterized in that the ITO transparent conductive glass (the preparation method of the ITO transparent conductive glass is conventional) is sequentially washed by water and absolute ethyl alcohol through ultrasonic waves for 5min, and is finally immersed into the absolute ethyl alcohol for standby;

(2) preparing WO on a conducting layer of ITO transparent conductive glass₃The WO is prepared by adopting an electrodeposition method in the laminated experiment₃. Firstly weighing 12g of tungsten powder in a beaker, slowly pouring 44ml of 30% hydrogen peroxide in a small amount for multiple times, adding magnetons, stirring for 2-3h, adding 12ml of acetic acid to adjust the pH value of the solution to be acidic, adding 44ml of ethanol, and stirring for 12h in a fume hood. The solution is put into a centrifuge to obtain the preparation WO₃Electrolyte solution required for the film.

The experiment is a three-electrode system, a platinum sheet is used as a counter electrode, ITO glass is used as a working electrode, silver chloride is used as a reference electrode, electrolysis is carried out for 20min under the condition that the constant current is 0.75mA, and a product is repeatedly cleaned by deionized water and absolute ethyl alcohol, placed into an oven, dried for 24h and taken out for later use.

(3) WO obtained in step (2)₃Preparation of polyaniline in layers

Firstly, preparing an ethanol solution of sulfuric acid, mixing concentrated sulfuric acid and absolute ethanol, adding a certain amount of aniline monomer after stirring for a period of time, and stirring for a period of time, preferably at least 12 hours, so as to obtain an electrodeposition PANI precursor solution.

The stress relation of the concentrated sulfuric acid, the absolute ethyl alcohol and the aniline monomer is as follows: concentrated sulfuric acid: anhydrous ethanol: aniline monomer 5.6 ml: 100 ml: 4.6 g.

The PANI precursor solution is selected to carry out electrodeposition, the experiment is a three-electrode system, a platinum sheet is used as a counter electrode, ITO glass is used as a working electrode, silver chloride is used as a reference electrode, electrolysis is carried out for 20min under the condition that the constant current is 0.75mA, the electrochemical deposition of the PANI electrochromic film is carried out on the surface of the ITO conductive glass, the product is repeatedly cleaned by deionized water and absolute ethyl alcohol, and the product is put into an oven and taken out for standby after being dried for 24 h.

(4) Preparation of ion-conducting layer solution

Mixing lithium perchlorate, polypropylene carbonate, an ultraviolet curing agent and ethanol according to a proportion, wherein the dosage relationship is as follows: lithium perchlorate: polypropylene carbonate: ultraviolet curing agent: ethanol 4.05 g: 25 ml: 12.5 ml: 12.5ml, stirring for 12h for later use; play the role of color fixation and electric conduction.

(5) Package with a metal layer

Compounding the other piece of ITO transparent conductive glass with the ITO transparent conductive glass obtained in the step (3), wherein in the experimental stage, 3M double faced adhesive tape is selected to connect and fix the two pieces of ITO transparent conductive glass, the conductive layer solution in the step (4) is slowly injected into the gap formed by fixing the two pieces of ITO transparent conductive glass by 3M through a needle tube, the solution is slowly solidified under the irradiation of ultraviolet light, and the needle tube is drawn out after the solidification is carried out for 5min to form the conductive layer; and completing the preparation of the electrochromic glass.

The power supply uses 220V.

The voltage is reduced to the working voltage of the electrochromic glass by the transformer (9) and the on-off of the circuit is determined by the double-pole double-throw switch (8), so that the direction of the current passing through the electrochromic glass device is changed, the on-off time of the circuit can be manually controlled, the coloring degree of the electrochromic glass is adjusted, and the light transmittance is changed to realize the light and shade degree in the glass of the show window of the museum.

The polyaniline and the tungsten trioxide are combined to prepare the electrochromic film, harmful near infrared light of a flash lamp is filtered, cultural relics are protected, the requirement of tourists on photographing is met, the color changing depth can be adjusted and controlled by freely prolonging or shortening the electrifying time, the transmittance of visible light is controlled, and the temperature of a show window is changed. The electrochromic film is prepared by adopting a method of combining inorganic and organic materials, so that the color regulation and control range of the electrochromic glass device is wider and more attractive, and the electrochromic glass device can achieve the effects of green and energy saving due to low working voltage and low power and can be recycled.

Drawings

FIG. 1 is a schematic view of the distribution of the electrochromic glass laminate film according to the present invention.

Fig. 2 is a schematic circuit diagram of the museum show window of the present invention.

In fig. 1, 1. glass a; 2. a glass b; 3. conducting layer A- - -electrode a; 4. conducting layer B- - -electrode B; WO 5₃A cathode coloring layer; 6. an electrolyte layer; 7. and a polyaniline ion storage layer.

In FIG. 2, 8, a double pole double throw switch; 9. a transformer; 10. electrochromic glass; 11. a power source; 12. a protection resistor;

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited to the following examples.