CN114842736A - Quantum dot material-based encoding label and packaging method thereof - Google Patents

Abstract

The invention discloses a quantum dot material-based coding label and a packaging method thereof. The method first selects a film as a substrate, and washes the surface of the film to obtain a base film layer; and then lays the prepared quantum dot solution on the base film layer. and air-drying to obtain perovskite quantum dot solutes to form a quantum dot material layer; coat the light-transmitting polymer material solution on the surface of the quantum dots, and perform curing treatment to form a protective layer; finally, in the quantum dot material layer The other side of the adhesive layer is used to adhere to the surface of the object. This method will use the encapsulation technology to isolate the perovskite quantum dot material from the air, avoiding the problem of irreversible decay of the quantum effect of the perovskite quantum dot material when exposed to the air, and ensuring the perovskite quantum dot material. It can be effective for a long time and can be individually packaged into an independent label, which is convenient for installation and replacement, and further reduces the damage to cultural relics or target objects.

Description

Material coding label based on quantum dots and its packaging method

technical field

The invention relates to the technical field of quantum dot labels, in particular to a quantum dot material-based coding label and a packaging method thereof.

Background technique

The label is generally placed on the surface of the target object, and is pasted, printed, and transferred on the target object, and the target object is detected by identifying the label, such as random wrinkle patterns with tunable fluorescence, randomly distributed nanoparticle patterns Wait.

Photoluminescence (PL) does not contact and damage the material. Light directly strikes a material, is absorbed by the material and transfers excess energy to the material, a process called photoexcitation. This excess energy can be dissipated in the form of light. The process of emitting light due to light excitation is called photoluminescence. Quantum dots (QDs) refer to zero-dimensional semiconductor crystal nanoparticles with nano-effects, which are semiconductor nanocrystals composed of hundreds to thousands of atoms, and their particle size is about 10 nm. Quantum dots have an internal quantum efficiency of up to 100%, high energy efficiency, and the absorption and emission of photons of different wavelengths can also be obtained by controlling the particle size of the quantum dots.

Perovskite quantum dot materials have strong photoluminescence properties in the visible light and infrared light ranges, but if the perovskite quantum dot materials are directly exposed to the air, their quantum effects will rapidly decay irreversibly, ensuring that The perovskite quantum dot material can be effectively isolated from the air. Therefore, there is a need for a label that can be guaranteed to be fabricated from quantum dot materials and has long-term efficacy.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a quantum dot material-based coding label and a packaging method thereof, which encapsulates the perovskite quantum dot material, and uses a material with better airtightness to ensure that the quantum dots in the label are Materials are valid.

To achieve the above object, the present invention provides the following technical solutions:

The encapsulation method based on quantum dot material coding label provided by the present invention comprises the following steps:

S1: Select the film as the base, and wash the surface of the film to obtain a base film layer;

S2: laying the prepared quantum dot solution on the base film layer, and performing air-drying treatment to obtain the perovskite quantum dot solute to form a quantum dot material layer;

S3: Coating the light-transmitting polymer material solution on the surface of the quantum dots, and performing curing treatment to form a protective layer;

S4: An adhesion layer for adhering to the surface of the object is formed on the other side of the quantum dot material layer.

Further, the quantum dot solution is arranged in the middle part of the base film layer, and the surrounding of the base film layer is connected with the protective layer to form a cavity for sealing the quantum dot solution.

Further, the cleaning treatment on the membrane surface is to remove the dirt on the membrane surface by a cleaning agent, and dry it with a stable gas, and the cleaning agent includes deionized water, absolute ethanol, analytically pure isopropanol, analytical Any one or any combination of pure acetone.

Further, the quantum dot solution is a water-soluble perovskite quantum dot solution, the water-soluble perovskite quantum dot solution is spread on the substrate, air-dried in a fume hood at room temperature, and the solution is volatilized to obtain the perovskite Mine quantum dot solutes.

Further, the protective layer uniformly coats the light-transmitting polymer material solution on the surface of the quantum dots, and cures at room temperature, and the light-transmitting polymer material solution is a B72-ethyl acetate solution.

Further, the material of the adhesion layer adopts B72-ethyl acetate solution.

Further, the B72-ethyl acetate solution used in the protective layer is a B72-ethyl acetate solution with a low mass fraction.

Further, the B72-ethyl acetate solution used in the adhesion layer is a high-quality B72-ethyl acetate solution, prepared according to the following steps:

1) obtain B72 solid, and pure ethyl acetate solvent;

2) Put the B72 solid into the filter device;

3) After pouring into ethyl acetate, rotate and stir with a magnetic stirrer, and set a film to prevent ethyl acetate from volatilizing;

4) The B72-ethyl acetate solution was prepared after the B72 solid was dissolved.

The label provided by the present invention is a label produced by using the above-mentioned quantum dot material-based coding label packaging method.

In the cultural relic monitoring label provided by the present invention, the label is also provided on the surface of the cultural relic to be monitored.

The beneficial effects of the present invention are:

For the coding label based on quantum dot material and its packaging method provided by the present invention, firstly, a film is selected as a substrate, and the surface of the film is cleaned to obtain a base film layer; then the prepared quantum dot solution is laid on the base film layer, and air-drying to obtain perovskite quantum dot solutes to form a quantum dot material layer; coating the light-transmitting polymer material solution on the surface of the quantum dots, and performing curing treatment to form a protective layer; finally, on the other side of the quantum dot material layer. One side makes an adhesive layer for sticking to the surface of the object. This method will use the encapsulation technology to isolate the perovskite quantum dot material from the air, avoiding the problem of irreversible decay of the quantum effect of the perovskite quantum dot material when exposed to the air, and ensuring the perovskite quantum dot material. It can be effective for a long time and can be individually packaged into an independent label, which is convenient for installation and replacement, and further reduces the damage to cultural relics or target objects.

Other advantages, objects, and features of the present invention will be set forth in the description that follows, and will be apparent to those skilled in the art based on a study of the following, to the extent that is taught in the practice of the present invention. The objectives and other advantages of the present invention may be realized and attained by the following description.

Description of drawings

In order to make the purpose, technical solutions and beneficial effects of the present invention clearer, the present invention provides the following drawings for description:

FIG. 1 is a flow chart of a method for encapsulating a quantum dot material coding label.

FIG. 2 is a schematic structural diagram of a quantum dot material coding label.

Detailed ways

The present invention is further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

Example 1

As shown in FIG. 1, the quantum dot material-based coding label and its packaging method provided in this embodiment, the quantum dot material in this embodiment adopts perovskite quantum dot material, and its packaging process mainly consists of the following steps:

S1: Choose a transparent, hard or soft film as the base, such as PET film, PDMS film, etc. And respectively use deionized water, absolute ethanol, analytically pure isopropanol, analytically pure acetone, etc. to clean the dirt on the surface of the membrane layer, and then use high-pressure stable gas to dry for use. The high-pressure stable gas provided in this embodiment is high-pressure nitrogen, and other inert gases, or stable gases that do not affect people or materials can also be used.

S2: Spread the prepared water-soluble perovskite quantum dot solution on the substrate, air dry it in a fume hood for 30 min at room temperature, and volatilize the solution, leaving only the perovskite quantum dot solute.

S3: Coat the surface of the quantum dots with a polymer material solution with high light transmittance, such as B72-ethyl acetate solution with a proportion of 9-11wt%, etc., cure at room temperature for 42-50h, and cure at 45-55℃ for 45 hours -50h.

In this example, a B72-ethyl acetate solution with a proportion of 10 wt% is used, and the solution is cured at room temperature for 48 hours and at 50° C. for 48 hours.

Since the lower the mass fraction, the longer the drying process takes, so the range of the low mass fraction provided in this example is 5wt%-20wt%. Or the B72-ethyl acetate solution of the corresponding mass fraction can be selected according to the actual situation.

S4: The prepared perovskite quantum dots are adhered to the surface of the object by using a high concentration of B72-ethyl acetate solution (accounting for 50wt% and above), and after air-drying for 4 hours, the label can be effectively adhered to the surface of the cultural relic. Finally, an optical label with weather resistance, high transparency, high tack and high reliability is formed.

Among them, different mass fractions of B72-ethyl acetate solutions were used in film formation and adhesion, respectively.

1) The use of a low mass fraction of B72-ethyl acetate solution in the film formation is to have better hydrophilicity when laying it on the surface of perovskite quantum dots, and to avoid the liquid becoming spherical and drying on the surface of perovskite. Difficult to form a film after. After the film is formed, B72 has good hydrophobicity, so it can prevent the liquid from accumulating on the surface of the film and affecting the optical effect of the label. And B72 has good corrosion resistance, which effectively protects the label itself from being affected by other substances.

2) The use of high-quality B72-ethyl acetate solution during adhesion is to accelerate the volatilization of its solvent and to express its viscosity after rapid drying.

The high mass fraction in this embodiment is limited to 50wt%-70wt%. Since the high mass fraction will result in faster drying, but will lead to poor fluidity, it can be selected according to the actual situation.

Among them, the preparation method of the B72-ethyl acetate solution is as follows: the method given here is only an example of using 500 ml of solvent to prepare a 10 wt% solution, and the actual preparation amount is determined as needed.

1) Use an analytical balance (accurate to 0.0001g) to weigh 50g of B72 solid, and use a graduated cylinder to measure 500ml of analytically pure ethyl acetate solvent of 0.9g/ml;

2) Wrap the B72 solid in gauze or filter, use a bamboo stick to penetrate the upper part of the gauze and hang it on the beaker, so that the gauze hangs in the beaker;

3) After pouring 500ml of ethyl acetate, place a magnetic rotor in the beaker, place the beaker on a magnetic stirrer and rotate at a speed of 120r/min, and lay a layer of plastic wrap on the beaker to prevent the ethyl acetate from volatilizing .

4) After 2 hours of dissolving, all the B72 solids in the beaker were dissolved, and a B72-ethyl acetate solution with a proportion of 10 wt% was prepared for use.

Example 2

The quantum dot material coding label provided in this embodiment sequentially includes a base film layer, a quantum dot material layer, a protective layer and an adhesion layer; the base film layer is used to provide the base of the quantum dot material; the quantum dot material layer is The perovskite quantum dot material layer after air-drying treatment; the protective layer is a cured light-transmitting polymer material layer coated on the surface of the quantum dot material layer; the adhesion layer is provided on the quantum dot material layer The other side is used to adhere the coating with the surface of the object; the quantum dot solution is arranged in the middle part of the base film layer, and the base film layer is connected with the protective layer around to form a cavity for sealing the quantum dot solution.

The quantum dot material coding label provided in this embodiment is arranged on the cultural relic to be monitored to form a cultural relic monitoring label. The label not only utilizes the strong photoluminescence properties of perovskite quantum dot materials in the visible light and infrared light ranges, but also Labels made of quantum dot materials are effective for a long time due to the encapsulation that isolates the air.

Compared with directly coating the monitoring marks on the monitoring cultural relics, installing quantum dot coding labels on the monitoring cultural relics saves time and labor intensity, and improves the layout efficiency of the monitoring system. And it is more convenient to maintain the monitoring system.

The label provided in this embodiment is used for setting on the surface of the cultural relic to be monitored. Since the adhesive layer, substrate, quantum dot layer and protective layer are all made of transparent materials, when the label is set on the surface of the cultural relic, the cultural relic will not be affected. The appearance of the surface conforms to the requirements of cultural relics protection and avoids damage to cultural relics caused by labels.

The above-mentioned embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention is subject to the claims.

Claims (10)

1. The encoding label packaging method based on the quantum dot material is characterized by comprising the following steps: the method comprises the following steps:

s1: selecting a film as a substrate, and cleaning the surface of the film to obtain a substrate film layer;

s2: the prepared quantum dot solution is laid on the substrate film layer, and air-drying treatment is carried out to obtain perovskite quantum dot solute to form a quantum dot material layer;

s3: coating a high polymer material solution with light transmittance on the surface of the quantum dot, and carrying out curing treatment to form a protective layer;

s4: and manufacturing an adhesion layer for adhering to the surface of the object on the other surface of the quantum dot material layer.

2. The quantum dot material-based coded label encapsulation method of claim 1, wherein: the quantum dot solution is arranged in the middle of the base film layer, and the periphery of the base film layer is connected with the protective layer to form a chamber for sealing the quantum dot solution.

3. The quantum dot material-based coded label encapsulation method of claim 1, wherein: the membrane surface is cleaned by removing dirt on the membrane surface through a cleaning agent, and the membrane surface is dried by using stable gas, wherein the cleaning agent comprises any one or any combination of deionized water, absolute ethyl alcohol, analytically pure isopropanol and analytically pure acetone.

4. The quantum dot material-based coded label encapsulation method of claim 1, wherein: the quantum dot solution is a water-soluble perovskite quantum dot solution, the water-soluble perovskite quantum dot solution is flatly laid on a substrate, air drying is carried out in a fume hood at room temperature, and the perovskite quantum dot solute is obtained after the solution is volatilized.

5. The quantum dot material-based coded label encapsulation method of claim 1, wherein: the protective layer is formed by uniformly coating a light-transmitting high polymer material solution on the surface of the quantum dot and curing at room temperature, wherein the light-transmitting high polymer material solution is B72-ethyl acetate solution.

6. The quantum dot material-based coded label encapsulation method of claim 1, wherein: the material of the adhesion layer adopts B72-ethyl acetate solution.

7. The quantum dot material-based coded label encapsulation method of claim 1, wherein: the B72-ethyl acetate solution used for the protective layer is a low mass fraction B72-ethyl acetate solution.

8. The quantum dot material-based coded label encapsulation method of claim 1, wherein: the B72-ethyl acetate solution used for the adhesion layer is a high-quality-fraction B72-ethyl acetate solution and is prepared according to the following steps:

1) obtaining B72 solid and pure ethyl acetate solvent;

2) placing the B72 solid into a filtering device;

3) after ethyl acetate is poured in, the mixture is stirred by a magnetic stirrer in a rotating way, and a film for preventing the ethyl acetate from volatilizing is arranged;

4) after the B72 solid is dissolved, a B72-ethyl acetate solution is prepared.

9. A label, characterized in that: the label obtained by the method for packaging the quantum dot material-based coded label according to any one of claims 1 to 8.

10. Historical relic monitoring label, its characterized in that: the label manufactured by the quantum dot material coding-based label packaging method according to any one of claims 1-8, wherein the label is used for being arranged on the surface of a cultural relic to be monitored.

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