CN110343274B - Preparation method of bright enhancement film transparent substrate - Google Patents
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- C08B37/0027—2-Acetamido-2-deoxy-beta-glucans; Derivatives thereof
- C08B37/003—Chitin, i.e. 2-acetamido-2-deoxy-(beta-1,4)-D-glucan or N-acetyl-beta-1,4-D-glucosamine; Chitosan, i.e. deacetylated product of chitin or (beta-1,4)-D-glucosamine; Derivatives thereof
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Abstract
The invention relates to a substrate, in particular to a method for preparing a bright enhancement film transparent substrate, which comprises the following steps: 1) sequentially carrying out alkaline boiling reflux, acid leaching stirring and ethanol heating reflux on the Chinese rice locust covering wings, filtering, and washing filter residues to be neutral by using deionized water; 2) transferring the filter residue to ethylene diamine tetraacetic acid aqueous solution of azodiisobutyronitrile and cyclohexanone peroxide, adjusting the pH value of the solution, sealing, heating and continuously stirring, filtering the product, and cleaning the filter residue to be neutral by using deionized water; 3) transferring the filter residue into acetic acid solution, grinding, centrifuging and taking supernatant; 4) diluting the supernatant with deionized water, evaporating partial water, and making into hydrogel. The brightness enhancement film transparent substrate prepared by taking the wings of agricultural pests, namely Chinese rice locust, as raw materials through a specific physicochemical method has good elasticity and visible light transmittance, is excellent in special environment tolerance, can reduce impact damage to an organic flexible screen containing the brightness enhancement film transparent substrate, and can obtain a good brightness enhancement effect.
Description
Technical Field
The invention relates to a substrate, in particular to a method for preparing a bright enhancement film transparent substrate.
Background
The brightness enhancement film belongs to an optical diffusion film, is an important component of an organic flexible screen, and is prepared from chemical raw materials in the prior art, so that the price is high and the development is not sustainable. In view of the fact that the related technology of the flexible screen is taken as a new technology, the flexible screen is expected to be applied to high-tech products such as mobile phones, liquid crystal televisions, computers, automobiles, wearable intelligent equipment and the like on a large scale. The technical research and development of related products have attractive market development prospects.
The preparation materials of the traditional optical diffusion film such as a brightness enhancement film mainly comprise polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), polybutyl methacrylate (PBMA), Polyurethane (PU) and the like. The main reason for the selection of these materials is their high visible light transmittance, but there is still a need for improvement in terms of raw material cost, thermal stability, tensile strength, yellowing resistance, dimensional variability, and adhesion. In addition, the materials belong to chemical plastics, the production cost is greatly influenced by the price fluctuation of crude oil, and the market stability is poor. Particularly, the materials exist in the form of micron-sized films or microspheres, ecological environmental problems such as 'micro plastic' and 'white pollution' are easily caused, and even the health of human bodies is directly threatened, so that the development of a new material for the optical diffusion film, which has better performance, is economic and environment-friendly, is needed.
The bio-based material is a novel material manufactured by utilizing renewable biomass, and has the characteristics of renewable raw materials, low cost, safety, no pollution, biodegradability and the like. The chitin nanofiber material is a bio-based material which is rapidly developed in recent years, has the advantages of high light transmittance (more than 90%), high tensile strength (more than 230MPa), good thermal stability, excellent size variability, yellowing resistance and the like, and very meets the requirements of an optical diffusion film on preparation materials. In addition, the adhesive force of adhesives such as PU and the like can be obviously improved by adding the chitin nanofiber material. Particularly, the chitin is the second most natural polymer with the yield second to that of cellulose in nature, and the preparation raw materials of the chitin are mainly shrimp and crab shells, so that China has abundant cheap raw materials. In conclusion, if the chitin nanofiber material is used for replacing traditional chemical engineering plastics such as PET and the like, an optical diffusion film which is better in performance, lower in price, safe and pollution-free can be prepared.
The above background disclosure is only for the purpose of assisting understanding of the inventive concept and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is disclosed at the filing date of the present patent application.
Disclosure of Invention
The invention aims to provide a preparation method of a bright enhancement film transparent substrate, which is prepared from the raw material of the wings of the agricultural pest, namely the locust of the China rice through a specific physicochemical method, has the advantages of simple operation and low cost, has better elasticity and visible light transmittance, has excellent special environment tolerance, can reduce the impact damage of an organic flexible screen containing the bright enhancement film transparent substrate, and can obtain better bright enhancement effect.
In one aspect of the present application, the technical solution adopted by the present invention to achieve the above object is a method for preparing a transparent substrate for a brightness enhancement film, which includes the following steps:
1) boiling wings of the locusta chinensis with alkali in sequence, refluxing, acid leaching, stirring, heating and refluxing with ethanol, filtering, and washing filter residues with deionized water to neutrality;
2) adding azodiisobutyronitrile and cyclohexanone peroxide into the disodium ethylene diamine tetraacetate aqueous solution, transferring filter residues into the mixed solution, adjusting the pH value of the solution to 10-12, sealing, heating and continuously stirring, filtering a product, and cleaning the filter residues to be neutral by using deionized water;
3) transferring the filter residue into acetic acid solution, grinding the mixed solution, and centrifuging to obtain supernatant;
4) Diluting the supernatant with deionized water by 10 times, and evaporating partial water to obtain hydrogel.
In the summary of the invention and the preferred embodiment of the present application, the soda boiling reflux in step 1) is 5% NaOH boiling reflux for 2 d.
In the summary and the preferred embodiment of the invention, the acid leaching stirring in step 1) is 2mol/L nitric acid soaking stirring for 2 d.
In the summary and the preferred embodiment of the invention, the absolute ethyl alcohol in step 1) is heated and refluxed for 5 hours at a temperature of 30-50 ℃; the reflux temperature can be 30 deg.C, 31 deg.C, 32 deg.C, 33 deg.C, 34 deg.C, 35 deg.C, 36 deg.C, 37 deg.C, 38 deg.C, 39 deg.C, 40 deg.C, 41 deg.C, 42 deg.C, 43 deg.C, 44 deg.C, 45 deg.C, 46 deg.C, 47 deg.C, 48 deg.C, 49 deg.C or 50 deg.C, and any specific value selected from the range of any two of the above-mentioned values as end values.
In the summary and the preferred embodiment of the present invention, the content of disodium edetate in the disodium edetate aqueous solution in the step 2) is 5.0-15.0%, g/mL; the amount can be 5.0% (g/mL), 5.5% (g/mL), 6.0% (g/mL), 6.5% (g/mL), 7.0% (g/mL), 7.5% (g/mL), 8.0% (g/mL), 8.5% (g/mL), 9.0% (g/mL), 9.5% (g/mL), 10.0% (g/mL), 10.5% (g/mL), 11.0% (g/mL), 11.5% (g/mL), 12.0% (g/mL), 12.5% (g/mL), 13.0% (g/mL), 13.5% (g/mL), 14.0% (g/mL), 14.5% (g/mL), or 15.0% (g/mL) and any particular value selected from a range of any two of the preceding values.
In the summary of the invention and the preferred embodiment of the present application, the addition amount of the azobisisobutyronitrile in the step 2) is 0.1-10.0%, g/mL; the amount added can be 0.1% (g/mL), 0.5% (g/mL), 1.0% (g/mL), 1.5% (g/mL), 2.0% (g/mL), 2.5% (g/mL), 3.0% (g/mL), 3.5% (g/mL), 4.0% (g/mL), 4.5% (g/mL), 5.0% (g/mL), 5.5% (g/mL), 6.0% (g/mL), 6.5% (g/mL), 7.0% (g/mL), 7.5% (g/mL), 8.0% (g/mL), 8.5% (g/mL), 9.0% (g/mL), 9.5% (g/mL), or 10.0% (g/mL), and any particular value selected from any range of values inclusive thereof.
In the summary of the invention and the preferred embodiment of the present application, the addition amount of cyclohexanone peroxide in step 2) is 1.0-5.0%, g/mL; the amount added can be 1.0% (g/mL), 1.5% (g/mL), 2.0% (g/mL), 2.5% (g/mL), 3.0% (g/mL), 3.5% (g/mL), 4.0% (g/mL), 4.5% (g/mL), or 5.0% (g/mL), and any specific value can be selected from the range between any two of the above values.
In the summary and the preferred embodiment of the present invention, the ratio of the filter residue to the disodium ethylene diamine tetraacetate aqueous solution in the step 2) is 1:20, g/mL.
In the summary and the preferred embodiment of the present application, the heating in step 2) is infrared heating to 40-60 ℃; the temperature can be 40 deg.C, 41 deg.C, 42 deg.C, 43 deg.C, 44 deg.C, 45 deg.C, 46 deg.C, 47 deg.C, 48 deg.C, 49 deg.C, 50 deg.C, 51 deg.C, 52 deg.C, 53 deg.C, 54 deg.C, 55 deg.C, 56 deg.C, 57 deg.C, 58 deg.C, 59 deg.C, or 60 deg.C, and any specific value selected from the ranges given to the extremes.
In the summary and the preferred embodiment of the present application, the continuous stirring in step 2) is performed at a rotation speed of 60 to 180r/min for 12 hours.
In the summary and preferred embodiment of the present application, the pH of the acetic acid solution of step 3) is 3.
In the summary and the preferred embodiment of the present application, the feed-liquid ratio of the filter residue of step 3) to the acetic acid solution is 1:50, g/mL.
In the summary and preferred embodiments of the present application, the grinding of step 3) may be carried out using a stone mortar grinder for at least 2 h.
In the summary and preferred embodiment of the present application, the centrifugation conditions in step 3) are 12000r/min, 4 ℃ and at least 30 min.
In the summary and preferred embodiment of the present application, in said step 4), part of the water can be evaporated under an oil bath at 100 ℃.
In the summary and the preferred embodiment of the present application, the evaporation part of the water in the step 4) means evaporation to a water content of less than 40%; the water content can be 40%, 39.5%, 39%, 38.5%, 38%, 37.5%, 37%, 36.5%, 36%, 35.5%, 35%, 34.5%, 34%, 33.5%, 33%, 32.5%, 32%, 31.5%, 31%, 30.5%, 30%, 29.5%, 29%, 28.5%, 28%, 27.5%, 27%, 26.5%, 26%, 25.5%, 25%, 24.5%, 24%, 23.5%, 23%, 22.5%, 22%, 21.5%, 21%, 20.5%, 20%, 19.5%, 19%, 18.5%, 18%, 17.5%, 17%, 16.5%, 16%, 15.5%, 15%, 14.5%, 14%, 13.5%, 13%, 12.5%, 12%, 11.5%, 11%, 10.5%, 10%, 9.5%, 9%, 8.5%, 8%, 7.5%, 7%, 6.5%, 6%, 5.5%, 5%, 4.5%, 4%, 3.5%, 3%, 2.5%, 2%, 1.5%, 1%, or 0.5%, and any specific value selected from the range between any two of the above values.
The novel chemically modified nano chitin fibrous material is obtained by treating the covering wings of the agricultural pest Chinese rice locust as a raw material through a specific physicochemical method, and the transparent substrate of the bright enhancement film is prepared through a film forming process, so that the economic value of the pest Chinese rice locust is improved by changing waste into valuable through a simple process, and the method is simple to operate and low in cost; the cured bright enhancement film transparent substrate can keep better elasticity (more than 200%) and better visible light transmittance (more than 90%), still has higher elasticity, visible light transmittance, lower color change and smaller curling degree under special environments such as high temperature/high humidity, high temperature, low temperature, heat shock, curling and the like, and has attractive market development prospect in the field of display equipment due to excellent special environment tolerance.
In another aspect of the present application, there is also provided a bright enhancement film transparent substrate, characterized in that the bright enhancement film transparent substrate is prepared by the method described in any one of the above-mentioned another aspects.
In yet another aspect of the present application, the present application further provides a backlight module comprising the bright enhancement film transparent substrate prepared by the method of any one of the above aspects or the bright enhancement film transparent substrate of the above another aspect.
In still another aspect of the present application, the present application also provides a use of the bright enhancement film transparent substrate of the above another aspect in a display device.
The method takes the covering wings of the agricultural pest Chinese rice locust as raw materials, obtains a novel chemically modified nano chitin fibrous material after being treated by a specific physical and chemical method, and prepares the bright enhancement film transparent substrate after the film forming process, thereby not only changing waste into valuable and improving the economic value of the pest Chinese rice locust by a simple process, but also having simple operation and low cost; the transparent basement of membrane that adds lustre to after the solidification can keep better elasticity (more than 200%), when the organic flexible screen of collocation it receives external force impact, can strike the transparent basement layer of membrane that adds lustre to at first, the transparent basement of membrane that adds lustre to consequently takes place elastic deformation and absorb external force, thereby can avoid and/or reduce the organic flexible screen that contains the transparent basement layer of membrane that adds lustre to receive external force impact, in order to reduce the damage that organic flexible screen received, thereby further make the white spot and/or the white point that are difficult for producing the influence effect on the transparent basement surface of membrane that adds lustre to, through the setting of the transparent basement layer of membrane that adds lustre to, can play the atomization effect simultaneously, thereby can also cover little different dirty white spot or white point; in addition, the organic flexible screen provided with the bright enhancement film transparent substrate can also obtain a better bright enhancement effect, so that the display effect of the display equipment provided with the backlight module with the bright enhancement film transparent substrate can be effectively improved.
The beneficial effects of the invention are as follows:
1) the novel chemically modified nano chitin fibrous material is obtained by treating the covering wings of the agricultural pest Chinese rice locust as a raw material through a specific physicochemical method, and the transparent substrate of the bright enhancement film is prepared through a film forming process, so that the economic value of the pest Chinese rice locust is improved by changing waste into valuable through a simple process, and the method is simple to operate and low in cost;
2) the cured bright enhancement film transparent substrate can keep better elasticity (more than 200%) and better visible light transmittance (more than 90%), still has higher elasticity, visible light transmittance, lower color change and smaller curling degree under special environments such as high temperature/high humidity, high temperature, low temperature, heat shock, curling and the like, and has attractive market development prospect in the field of display equipment due to excellent special environment tolerance;
3) the cured bright enhancement film transparent substrate can keep better elasticity (more than 200 percent), when the organic flexible screen matched with the substrate is impacted by external force, the transparent substrate of the bright enhancement film can be impacted firstly, and the transparent substrate of the bright enhancement film is elastically deformed to absorb the external force, so that the organic flexible screen comprising the transparent substrate of the bright enhancement film can be prevented and/or reduced from being impacted by the external force to reduce the damage to the organic flexible screen,
4) The good elasticity of the transparent substrate of the brightness enhancement film further enables white spots and/or white spots which are not easy to influence the effect to be generated on the surface of the transparent substrate of the brightness enhancement film, and the transparent substrate of the brightness enhancement film can play a role in atomization at the same time, so that small foreign-pollution white spots or white spots can be shielded;
5) in addition, the organic flexible screen provided with the bright enhancement film transparent substrate can also obtain a better bright enhancement effect, so that the display effect of the display equipment provided with the backlight module with the bright enhancement film transparent substrate can be effectively improved.
The invention adopts the technical scheme to provide the model essay, makes up the defects of the prior art, and has reasonable design and convenient operation.
Drawings
In order to make the aforementioned and other objects, features, and advantages of the invention, as well as others which will become apparent, reference is made to the following description taken in conjunction with the accompanying drawings in which:
fig. 1 is a SEM schematic view of a bright enhancement film transparent substrate prepared in example 1 of the present invention.
Detailed Description
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The present invention uses the methods and materials described herein; other suitable methods and materials known in the art may be used. The materials, methods, and examples described herein are illustrative only and are not intended to be limiting. All publications, patent applications, patents, provisional applications, database entries, and other references mentioned herein, and the like, are incorporated by reference herein in their entirety. In case of conflict, the present specification, including definitions, will control.
The application provides a preparation method of a bright enhancement film transparent substrate, which comprises the following steps:
1) boiling and refluxing the Chinese rice locust with 5% NaOH for 2d, then soaking and stirring with 2mol/L nitric acid for 2d, finally refluxing with absolute ethyl alcohol at the temperature of 30-50 ℃ for 5h, filtering, and washing filter residues with deionized water to be neutral;
2) adding 0.1-10.0% (g/mL) of azodiisobutyronitrile and 1.0-5.0% (g/mL) of cyclohexanone peroxide into 5.0-15.0% (g/mL) of disodium ethylenediamine tetraacetic acid aqueous solution, transferring filter residues into the mixed solution according to the material-to-liquid ratio of 1:20(g/mL), adjusting the pH value of the solution to 10-12, sealing, carrying out infrared heating to 40-60 ℃, stirring at the rotating speed of 60-180 r/min for 12 hours, filtering a product, and washing the filter residues to be neutral by using deionized water;
3) transferring the filter residue into an acetic acid solution with pH of 3 according to a material-liquid ratio of 1:5(g/mL), grinding for at least 2h by using a stone mortar grinder, and centrifuging for at least 30min at 12000r/min and 4 ℃ to obtain a supernatant;
4) diluting the supernatant with deionized water 10 times, evaporating partial water under 100 deg.C oil bath to water content below 40%, and making into hydrogel.
The application also provides a bright enhancement film transparent substrate which is characterized by being prepared by the method.
The application also provides a backlight module which comprises the bright enhancement film transparent substrate prepared by the method or the bright enhancement film transparent substrate.
The application also provides an application of the bright enhancement film transparent substrate in a display device.
Example 1:
the preferred embodiment provides a method for preparing a transparent substrate of a brightness enhancement film, which comprises the following steps:
1) sequentially carrying out alkaline boiling reflux, acid leaching stirring and ethanol heating reflux on the Chinese rice locust with the wings, filtering, and washing filter residues to be neutral by using deionized water;
2) adding azodiisobutyronitrile and cyclohexanone peroxide into the disodium ethylene diamine tetraacetate aqueous solution, transferring filter residues into the mixed solution, adjusting the pH value of the solution to 11, sealing, heating and continuously stirring, filtering a product, and cleaning the filter residues to be neutral by using deionized water;
3) transferring the filter residue into acetic acid solution, grinding the mixed solution, and centrifuging to obtain supernatant;
4) diluting the supernatant with deionized water 10 times, evaporating partial water, and making into hydrogel.
In this preferred embodiment, the method of making the bright enhancement film transparent substrate comprises the following further limitations:
a) the alkali boiling reflux in the step 1) is boiling reflux of 5% NaOH for 2 d;
b) The acid leaching and stirring in the step 1) are carried out by soaking and stirring for 2d by using 2mol/L nitric acid;
c) the heating reflux of the absolute ethyl alcohol in the step 1) is to reflux the absolute ethyl alcohol for 5 hours at the temperature of 42 ℃;
d) the content of the disodium ethylene diamine tetraacetate in the disodium ethylene diamine tetraacetate aqueous solution in the step 2) is 8.5 percent, g/mL;
e) in the ethylene diamine tetraacetic acid disodium solution obtained in the step 2), the addition amount of azodiisobutyronitrile is 2.5 percent, g/mL; the addition amount of cyclohexanone peroxide is 1.5 percent, g/mL;
f) the feed-liquid ratio of the filter residue in the step 2) to the ethylene diamine tetraacetic acid disodium water solution is 1:20, g/mL;
g) the heating in the step 2) is infrared heating to 45 ℃;
h) the continuous stirring in the step 2) is carried out for 12 hours at the rotating speed of 120 r/min;
i) in the step 3), the pH value of the acetic acid solution is 3;
j) in the step 3), the material-liquid ratio of the filter residue to the acetic acid solution is 1:50, g/mL;
k) in the step 3), the grinding can be carried out for 2 hours by using a stone mortar grinder;
l) in the step 3), the centrifugation condition is 12000r/min, 4 ℃ and 45 min;
m) in the step 4), part of water can be evaporated under an oil bath at 100 ℃;
n) in the step 4), the evaporation part of water is evaporated to a water content of 35%.
The novel chemically modified nano chitin fibrous material is obtained by treating the covering wings of the agricultural pest Chinese rice locust as a raw material through a specific physicochemical method, and the transparent substrate of the bright enhancement film is prepared through a film forming process, so that the economic value of the pest Chinese rice locust is improved by changing waste into valuable through a simple process, and the method is simple to operate and low in cost; the cured bright enhancement film transparent substrate can keep better elasticity (212%) and better visible light transmittance (92.5%), and still has higher elasticity, visible light transmittance, lower color change and smaller curling degree under special environments such as high temperature/high humidity, high temperature, low temperature, heat shock, curling and the like, and has attractive market development prospect in the field of display equipment due to excellent special environment tolerance.
Example 2:
this preferred embodiment also provides a bright enhancement film transparent substrate, which is characterized in that the bright enhancement film transparent substrate is prepared by the method described in the above embodiment 1.
Example 3:
the preferred embodiment further provides a backlight module, which includes the bright enhancement film transparent substrate described in embodiment 2.
Example 4:
this preferred embodiment also provides the use of the bright enhancement film transparent substrate described in embodiment 3 in a display device.
Conventional techniques in the above embodiments are known to those skilled in the art, and thus will not be described in detail herein.
Experimental example: tolerance detection of the bright enhancement film transparent substrate in embodiment 2 of the present application:
the brightness enhancement film transparent substrate is subjected to long-term or high-frequency resistance under special environments such as high temperature/high humidity, high temperature, low temperature, heat shock and curling, and the brightness reduction value, the color change and the curling degree of the brightness enhancement film transparent substrate are detected, and the statistical results are shown in table 1.
Table 1, example 2, tolerance test of the bright enhancement film transparent substrate in special environment
The bright enhancement film transparent substrate in preferred embodiment 2 of the present application can not only maintain good elasticity (212%) and good visible light transmittance (92.5%), but also have high elasticity, visible light transmittance, low color change and small curling degree under special environments such as high temperature/high humidity, high temperature, low temperature, heat shock and curling and the like as can be seen from table 1, and the good special environment tolerance of the bright enhancement film transparent substrate makes it have an attractive market development prospect in the field of display devices.
While the above detailed description has shown, described, and pointed out novel features as applied to various embodiments, it will be understood that various omissions, substitutions, and changes in the form and details of the device or method illustrated may be made without departing from the spirit of the disclosure. In addition, the various features and methods described above may be used independently of one another, or may be combined in various ways. All possible combinations and sub-combinations are intended to fall within the scope of the present disclosure. Many of the embodiments described above include similar components, and thus, these similar components are interchangeable in different embodiments. While the invention has been disclosed in the context of certain embodiments and examples, it will be understood by those skilled in the art that the invention extends beyond the specifically disclosed embodiments to other alternative embodiments and/or uses and obvious modifications and equivalents thereof. Accordingly, the invention is not intended to be limited by the specific disclosure of preferred embodiments herein.
Claims (9)
1. A method for preparing a transparent substrate of a brightness enhancement film is characterized by comprising the following steps:
1) boiling wings of the locusta chinensis with alkali in sequence, refluxing, acid leaching, stirring, heating and refluxing with ethanol, filtering, and washing filter residues with deionized water to neutrality;
2) adding azodiisobutyronitrile and cyclohexanone peroxide into the disodium ethylene diamine tetraacetate aqueous solution, transferring filter residues into the mixed solution according to the material-liquid ratio of 1:20 and g/mL, adjusting the pH value of the solution to 10-12, sealing, heating and continuously stirring, filtering a product, and cleaning the filter residues to be neutral by using deionized water;
3) transferring the filter residue into acetic acid solution, grinding the mixed solution, and centrifuging to obtain supernatant;
4) diluting the supernatant with deionized water by 10 times, evaporating partial water, and making into hydrogel;
in the disodium ethylene diamine tetraacetate aqueous solution in the step 2),
the content of the disodium ethylene diamine tetraacetate is 5.0-15.0 percent (g/mL);
the addition amount of the azodiisobutyronitrile is 0.1-10.0 percent, g/mL;
the addition amount of the cyclohexanone peroxide is 1.0-5.0 percent, g/mL;
the material-liquid ratio of the filter residue to the ethylene diamine tetraacetic acid disodium water solution is 1:20, g/mL;
the heating is infrared heating to 40-60 ℃;
the elasticity of the transparent substrate of the obtained bright enhancement film reaches 212 percent, and the visible light transmittance reaches 92.5 percent.
2. The method of claim 1, wherein: the alkali boiling reflux in the step 1) is boiling reflux for 2d by 5 percent NaOH.
3. The method of claim 1, wherein: the acid leaching stirring in the step 1) is to soak and stir 2d by 2mol/L nitric acid.
4. The method of claim 1, wherein: the ethanol in the step 1) is heated and refluxed for 5 hours at the temperature of 30-50 ℃ by using absolute ethanol.
5. The method according to any one of claims 1 to 3, wherein: the pH value of the acetic acid solution in the step 3) is 3.
6. The method according to any one of claims 1 to 3, wherein: the evaporation part of water in the step 4) is evaporated until the water content is lower than 40%.
7. A bright enhancement film transparent substrate, characterized in that the bright enhancement film transparent substrate is prepared by the method of any one of claims 1 to 6.
8. A backlight module comprising the bright enhancement film transparent substrate prepared by the method of any one of claims 1 to 6.
9. Use of the brightness enhancement film transparent substrate of claim 7 in a display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910649732.6A CN110343274B (en) | 2019-07-18 | 2019-07-18 | Preparation method of bright enhancement film transparent substrate |
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