A table lamp with adaptive driving and adjusting scattered light angle and a method for preparing a light drive film thereof

Abstract

The present invention relates to the technical field of lighting fixtures, specifically, a method for preparing a table lamp capable of adaptively driving and adjusting a diffuser angle and a light drive film thereof, comprising a lamp holder, a lamp shell mounted on the lamp holder, a lamp body mounted in the lamp shell, and a dimmer for adjusting the light intensity of the lamp body, wherein a diffuser cover arranged on the lamp body is installed in the lamp shell, and the diffuser cover comprises a light drive film wrapped around the outside of the lamp body, and the light drive film is made of a photosensitive, automatically opened and closed MXene / polyethylene / nano-Ag flexible light-concentrating material, and the nano-Ag is arranged close to one side of the lamp body. When the present application needs to provide a wide range of strong light irradiation, the light is brightened to cause asymmetric deformation of the light drive film, and the irradiation range can be expanded by opening it; when a small range of lighting is required, the light is dimmed to restore the light drive film, and the irradiation range can be reduced by closing it, so as to realize adaptive driving and adjusting the diffuser angle, automatically adjust the illumination range according to the usage scenario, and avoid the complex circuit design caused by multiple sensors, and has a simple structure, is easy to carry, and has a wide range of applications.

Description

Technical Field

[0001] The invention relates to the technical field of lighting fixtures, and in particular to a table lamp capable of adaptively driving and adjusting a scattered light angle and a method for preparing an optical drive film thereof. Background Art

[0002] Table lamps are common lighting fixtures in our daily life. They have many uses. They can not only provide lighting in a small area and be moved to corners for use, but also increase the brightness of a local area under a large lighting fixture and provide light to protect the human eye. Moreover, in public places, small-scale lighting will not disturb others. In a quiet environment, local lighting can also make people more comfortable. In general, table lamps are energy-saving, easy to carry, and exquisite and beautiful. Therefore, as a convenient lighting fixture, table lamps have been indispensable in our lives.

[0003] With the continuous development of science and technology, miniaturized and intelligent desk lamps are becoming more and more popular. For example, the Chinese invention patent with publication number CN107461648A discloses a desk lamp, which includes a lamp holder, a bracket, and a lampshade connected in sequence. A lamp body is installed in the lampshade. A dimming structure for adjusting the brightness of the lamp body when it is emitting light is provided on the lamp holder. Users can adjust the brightness of the lamp body through the dimming structure according to different occasions. However, for occasions requiring small-range lighting, the desk lamp cannot automatically adjust the lighting range, which is easy to disturb others.

[0004] The Chinese invention patent application with publication number CN108730812A discloses a desk lamp capable of adjusting light intensity, which collects the light intensity of the environment outside the lampshade through a photosensitive module and transmits the collected signal to a PLC controller, which controls the rotation of the electric motor to shrink or expand the baffle to achieve the control of light intensity. However, the above scheme uses various sensor elements, control elements and drive elements, resulting in the problem that the desk lamp is large in size, cannot be conveniently carried, has a complex structural design and is costly.

[0005] To this end, it is necessary to provide a desk lamp that can automatically adjust the lighting range according to the usage scenario, has a simple structure, and is easy to carry and can adaptively drive and adjust the astigmatism angle. Summary of the invention

[0006] The technical problem to be solved by the present invention is how to provide a desk lamp which can automatically adjust the lighting range according to the usage scenario, has a simple structure and is easy to carry and can adaptively drive and adjust the astigmatism angle.

[0007] The present invention solves the above technical problems through the following technical means:

[0008] A table lamp with adaptive drive and adjustable astigmatism angle comprises a lamp holder, a lamp shell installed on the lamp holder, a lamp body installed in the lamp shell, and a dimmer for adjusting the light intensity of the lamp body, wherein a astigmatism cover arranged on the lamp body is installed in the lamp shell, the astigmatism cover comprises an optical drive film wrapped around the outside of the lamp body, the optical drive film is made of a photosensitive automatically opened and closed MXene / polyethylene / nano-Ag flexible light-concentrating material, and the nano-Ag is arranged close to one side of the lamp body.

[0009] Beneficial effects: The optical drive film of the present application is made of MXene / polyethylene / nano-Ag flexible focusing material. When there is no light irradiation, the optical drive film is curved and wrapped around the outside of the lamp body to prevent dust; when there is light irradiation, the MXene / polyethylene / nano-Ag flexible focusing material automatically opens upon photosensitivity, and as the light intensity increases, the reflective effect of the nano-Ag causes the light of the lamp body to be gathered, achieving adaptive focusing, and at this time, the opening angle of the MXene / polyethylene / nano-Ag flexible focusing material increases accordingly.

[0010] When a wide range of strong light is required, the dimmer is adjusted to increase the light intensity of the lamp body. At this time, the reflection of nano-Ag increases the light intensity of the lamp body, causing the MXene / polyethylene / nano-Ag flexible light-concentrating material to produce asymmetric deformation and bend toward the MXene side, thereby driving the optical drive film to open, so that the lamp body has a larger illumination range and ensures the lighting effect; when a small range of lighting is required, the dimmer is adjusted to reduce the light intensity of the lamp body. At this time, the shape of the MXene / polyethylene / nano-Ag flexible light-concentrating material can be restored, thereby driving the optical drive film to close, which can block part of the light from the lamp body and reduce the illumination range so as not to affect others. It is suitable for different lighting scenes.

[0011] This application utilizes the adaptive focusing characteristics brought by nano-Ag reflection to improve the sensitivity of MXene / polyethylene / nano-Ag flexible focusing materials to light intensity, so that the optical drive film can open under strong light from the lamp body and close under weak light, and the opening angle increases with the increase of light intensity, thereby realizing the adaptive adjustment of the astigmatism angle of the desk lamp, which not only achieves the purpose of automatically adjusting the lighting range according to the usage scenario, but also avoids the complex circuit design brought by multiple sensors, so that the desk lamp has the advantages of simple structure, easy to carry and wide range of applications.

[0012] Preferably, the diffuser cover further comprises a mounting seat fixedly mounted in the lamp housing, the optical drive film is in a petal shape, and the root of the optical drive film is fixedly connected to the mounting seat.

[0013] Beneficial effects: The optical drive film of the present application is in the shape of petals and is installed in the lamp housing through a mounting base. The mounting base forms a stable support for the optical drive film. When the light intensity changes, each piece of the optical drive film can be stably and freely bent outside the lamp body, realizing the adaptive opening and closing of the optical drive film, simulating the bionic effect of flowers blooming and closing, having a strong aesthetic appeal, and can also play the role of dust prevention for long-term use of the desk lamp.

[0014] Preferably, the nano-Ag of the optical drive film is coated on the inner wall of one side of the polyethylene layer.

[0015] Beneficial effect: Since nano-Ag is coated on the inner wall of one side of the polyethylene layer, when the light intensity increases, the opening angle of the optical drive film increases, and the reflective surface of the nano-Ag coating is always facing the lamp body, maintaining a good focusing effect on the light. That is, the greater the light intensity, the better the focusing effect, and the stronger the effect on improving the sensitivity of MXene / polyethylene / nano-Ag flexible focusing material to light intensity, further ensuring the performance of the desk lamp's adaptive focusing drive to adjust the astigmatism angle.

[0016] Preferably, the lamp holder comprises a base clamp, a lamp pole and a lamp holder seat, one end of the lamp pole is fixedly connected to the base clamp, and the other end is fixedly connected to the lamp holder seat, the lamp pole is a metal hose wrapped in a plastic shell, and the lamp shell is fixedly mounted on the lamp holder seat.

[0017] Beneficial effects: When the present application is used, the base clamp can be placed directly on a flat surface, or it can be clamped and fixed on other objects such as tables and chairs. It is easy to use and can be conveniently carried. It is suitable for home reading, outdoor lighting and other places. And for environments with narrow lamp poles, after fixing the base clamp, the lamp pole can be moved to turn the lamp housing and the lamp body to the environment to be illuminated, which has wider adaptability.

[0018] Preferably, the desk lamp also includes a power supply for supplying power to the lamp body, the lamp body adopts a low-voltage light strip or LED lamp beads, the dimmer adopts a dimming controller, and the power supply adopts a battery pack or a mobile power supply device.

[0019] Beneficial effects: This application uses low-voltage light strips or LED lamp beads to solve the problem of needing to find a fixed power source. By using a mobile power source, the desk lamp can be lit anytime and anywhere, reducing the occupied space and realizing the feature of the desk lamp being portable.

[0020] The present invention also provides a method for preparing an optical drive film for a table lamp capable of adaptively driving and adjusting the astigmatism angle, comprising the following steps:

[0021] (1) Preparation of MXene solution: TiALC2 powder was added to a LiF / HCl mixed solution and stirred continuously to obtain a uniform mixture. The mixture was then washed with deionized water and centrifuged until the pH value of the supernatant was higher than 6. The precipitate after centrifugation was then dispersed in deionized water and subjected to ultrasonic treatment to obtain a MXene solution.

[0022] (2) Preparation of MXene film: Mix the MXene solution with deionized water, and obtain a wet MXene film by vacuum filtration of the mixed solution. Then, the MXene film and the filter membrane are dried at room temperature to obtain a MXene / filter membrane double-layer membrane, where the MXene film is located above the filter membrane.

[0023] (3) Preparation of MXene / polyethylene flexible material: Place the MXene / filter membrane double-layer film horizontally on paper, and attach a single-sided sticky polyethylene tape to the surface of the MXene film to obtain a polyethylene / MXene / filter membrane three-layer structure. The MXene / polyethylene flexible material is located above the filter membrane.

[0024] (4) Preparation of optical drive film: Using the filter membrane as the substrate, the MXene / polyethylene flexible double-layer membrane is cut into a pre-designed shape; then, nano-Ag is sprayed on the inner wall of one side of the polyethylene layer to prepare the MXene / polyethylene / nano-Ag flexible focusing material; finally, the filter membrane is peeled off to obtain the optical drive film.

[0025] Beneficial effects: In the present application, TiALC2 and LiF are mixed to form a MXene material with a two-dimensional structure. The MXene material has a structure of transition metal carbides, nitrides or carbonitrides with a thickness of several atomic layers, and has excellent light-to-heat conversion performance and thermal conductivity. After MXene is filtered and dried, a MXene film can be formed on the filter membrane. Then, a polyethylene tape is attached to the MXene film, at which time the polyethylene tape will be pre-stretched, and then the optical drive film of the desired shape is cut out with the filter membrane as the base. At this time, the polyethylene tape The pre-stretched recovery makes the MXene / polyethylene / nano-Ag flexible light-concentrating material bend toward the polyethylene layer to form a light-drive film with an initial bending angle; then spray nano-Ag on the inner wall of one side of the polyethylene layer to obtain the MXene / polyethylene / nano-Ag flexible light-concentrating material, and finally peel off the filter membrane; when in use, install the light-drive film on the mounting base and cover it on the lamp body. When there is strong light, the nano-Ag adaptive light-concentrating further enhances the light intensity, and the MXene can receive stronger light and convert light energy into heat energy, thereby converting the heat Transferred to polyethylene; Due to the presence of water molecules between MXene layers, MXene will lose water when heated and produce a small shrinkage deformation, while polyethylene has a large thermal expansion coefficient and can produce a large deformation when heated, which eventually leads to asymmetric deformation of the MXene / polyethylene / nano-Ag flexible light-concentrating material and bends toward one side of MXene, making the optical drive film as a whole tend to be flat; and there are oxygen-containing functional groups inside MXene. When the light intensity weakens, the intensity of light received by MXene decreases, and the temperature also decreases accordingly. At this time, the oxygen-containing functional groups absorb moisture in the air for recovery, and the shrinkage deformation of MXene and polyethylene is reduced. The MXene / polyethylene / nano-Ag flexible light-concentrating material can be restored to its original shape and bend according to a process opposite to the above, thereby realizing the photosensitivity and automatic opening and closing of the optical drive film; The setting of nano-Ag improves the sensitivity of the MXene / polyethylene / nano-Ag flexible light-concentrating material to light intensity, so that the optical drive film has a large bending and deformation ability under low light intensity stimulation, ensuring that the desk lamp using this optical drive film can adaptively adjust the irradiation range under low light intensity irradiation.

[0026] Preferably, in step (1), the mass ratio of TiALC2 to LiF is 1-1.2:1.2-1.5.

[0027] Furthermore, in step (1), the stirring temperature is 60° C. and the stirring time is 24 h.

[0028] Furthermore, the concentration of the MXene solution prepared in step (1) is 5 to 10 mg / ml.

[0029] Preferably, the concentration of the solution after mixing the MXene solution and deionized water in step (2) is 0.1-0.25 mg / ml.

[0030] Furthermore, the filtration time in step (2) is 2 to 5 hours, and the drying time is 4 to 8 hours;

[0031] Furthermore, the filter membrane in step (2) is a cellulose microporous filter membrane with a pore size of 0.22 μm, and the thickness of the MXene film is 3 to 10 μm.

[0032] Preferably, in step (3), the MXene film is pasted along the length direction of the polyethylene tape.

[0033] Beneficial effects: Since the polyethylene tape is anisotropic along its length, when preparing the MXene / polyethylene / nano-Ag flexible focusing material, it is necessary to stick the MXene film along the length of the tape, otherwise a double-layer film with a spiral structure will be obtained.

[0034] Preferably, in step (4), the thickness of the optical drive film is 45-50 μm, and the bending angle of the optical drive film is in the range of 30°-60°.

[0035] The advantages of the present invention are:

[0036] 1. When there is no light irradiation, the optical drive film of the present application is curved and wrapped around the outside of the lamp body for dust prevention. When there is light irradiation, the MXene / polyethylene / nano-Ag flexible light-concentrating material automatically opens upon being irradiated, and as the light intensity increases, the nano-Ag reflects the light to concentrate the light, realizing adaptive focusing. At this time, the opening angle of the MXene / polyethylene / nano-Ag flexible light-concentrating material increases accordingly. When a wide range of strong light irradiation is required, the dimmer is adjusted to enhance the light intensity of the lamp body, and the reflection of the nano-Ag enhances the light intensity of the lamp body, causing the MXene / polyethylene / nano-Ag flexible light-concentrating material to be asymmetrically deformed upon being irradiated, and bend toward the MXene side, thereby driving the optical drive film to open, so that the lamp body has a larger irradiation range and ensures the lighting effect. When a small range of lighting is required, the dimmer is adjusted to reduce the light intensity of the lamp body, and the shape of the MXene / polyethylene / nano-Ag flexible light-concentrating material is restored, thereby driving the optical drive film to close, thereby blocking part of the light of the lamp body and reducing the irradiation range so as not to affect others. It is suitable for different lighting scenes.

[0037] 2. The present application utilizes the adaptive focusing characteristics brought by nano-Ag reflection to improve the sensitivity of MXene / polyethylene / nano-Ag flexible focusing materials to light intensity, so that the optical drive film can open under strong light from the lamp body and close under weak light, and the opening angle increases with the increase of light intensity, thereby adaptively adjusting the astigmatism angle of the desk lamp, thereby achieving the purpose of automatically adjusting the lighting range according to the usage scenario, and avoiding the complex circuit design brought by multiple sensors, so that the desk lamp has the advantages of simple structure, easy to carry and wide range of applications.

[0038] 3. The present application utilizes TiALC2 and LiF to form a MXene material with a two-dimensional structure. After being modified by IPTS, the MXene material has excellent light-to-heat conversion performance and thermal conductivity. When exposed to strong light, MXene converts light energy into heat energy and transfers the heat to polyethylene. At the same time, MXene loses water due to heat and produces a small shrinkage deformation, while polyethylene produces a large deformation due to heat, which eventually causes the MXene / polyethylene / nano-Ag flexible light-concentrating material to produce asymmetric deformation and bend toward the MXene side. When the light intensity decreases, the temperature of MXene decreases, and the oxygen-containing functional groups therein absorb moisture in the air. At this time, the shrinkage deformation of MXene and polyethylene is reduced, and the MXene / polyethylene / nano-Ag flexible light-concentrating material returns to its original shape according to a process opposite to the above, realizing the automatic opening and closing of the optical drive film when it is sensitive to light. Moreover, the optical drive film also has a large bending and deformation ability under low light intensity stimulation, ensuring that the desk lamp using this optical drive film can adaptively adjust the irradiation range under low light intensity irradiation. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of preparing the optical drive film in Example 1 of the present application.

[0040] Figure 2 This is a lighting test diagram of the optical drive film in Example 1 of the present application.

[0041] Figure 3 This is a graph showing the test results of the optical drive response performance of the optical drive film in Example 4 of the present application.

[0042] Figure 4 This is a schematic diagram of the overall structure of Example 5 of the present application.

[0043] Figure 5 This is a schematic diagram of the deformation of the diffuser under light in Example 5 of the present application.

[0044] Explanation of the reference numerals: 1. lamp holder; 11. base clip; 12. lamp pole; 13. lamp holder; 14. lamp cord; 2. lamp housing; 3. lamp body; 4. dimmer; 5. power supply; 6. diffuser; 61. mounting base; 62. optical drive film; 621. MXene film; 622. polyethylene tape; 623. nano-Ag layer; 624. filter membrane. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Example 1

[0047] A method for preparing an optical drive film for a table lamp capable of adaptively driving and adjusting a diffuse light angle comprises the following steps:

[0048] (1) Preparation of MXene solution: 5 g of TiALC2 powder was added to 65 ml of LiF / HCl mixed solution, wherein the LiF / HCl mixed solution contained 6 g of LiF; the mixture was stirred for 24 h at 60 °C to obtain a uniform mixture; the mixture was then washed with deionized water and centrifuged until the pH value of the supernatant was higher than 6; the precipitate after centrifugation was dispersed in deionized water and ultrasonically treated for 2 h to obtain a MXene solution with a concentration of 8 mg / ml.

[0049] (2) Preparation of MXene film 621: Take 2 ml of MXene solution with a pipette, add deionized water to a total volume of 40 ml, and stir to obtain a mixed solution; place a cellulose microporous filter membrane 624 with a pore size of 0.22 μm on the sieve plate of the filter head, align the filter cup with the sieve plate and clamp it with a clamp, when the hose connects the filter head and the circulating water vacuum pump, turn on the vacuum pump power, and use a glass rod to drain the MXene solution into the filter cup for vacuum filtration. The filtration time is 4 hours to obtain a wet MXene film 621; then dry the MXene film 621 together with the filter membrane 624 at room temperature for 6 hours to obtain a MXene / filter membrane double-layer membrane. Above the filter membrane 624 is a MXene film 621 with a two-dimensional layered structure of transition metal carbides, nitrides or carbonitrides with a thickness of several atomic layers. The thickness of the MXene film 621 is 10 μm.

[0050] (3) Preparation of MXene / polyethylene flexible material: Place the MXene / filter membrane double-layer film horizontally on paper, and attach a polyethylene tape 622 with sticky single side to the surface of the MXene film 621 along the length direction of the tape to obtain a polyethylene / MXene / filter membrane three-layer structure. The MXene / polyethylene flexible material is located above the filter membrane 624.

[0051] (4) Preparation of optical drive film 62: Figure 1 As shown, with the filter membrane 624 as the base, a rectangular membrane with a size of 25 mm × 15 mm is cut out along the length direction of the polyethylene tape 622, and then the rectangular membrane is cut into a petal-shaped optical drive membrane 62; then, nano-Ag is sprayed on the inner wall of the lower part of the polyethylene tape 62 by magnetron sputtering to form a nano-Ag layer 623, that is, MXene / polyethylene / nano-Ag flexible focusing material is prepared; finally, the filter membrane 624 is peeled off to prepare the optical drive film 62, and the thickness of the optical drive film 62 is 7 μm.

[0052] The optical drive film 62 prepared in step (4) is subjected to a light test. Figure 2 In a natural state, the pre-stretching of the polyethylene tape 622 causes the optical drive film 62 to bend toward the polyethylene layer, forming an optical drive film 62 with an initial bending angle of 60°; when irradiated with strong light, the optical drive film 62 tends to be flat. This is because when there is strong light irradiation, the nano-Ag layer 623 reflects light so that the light is adaptively gathered. At this time, MXene receives stronger light and converts light energy into heat energy, and then transfers the heat to polyethylene. Since there are water molecules between the layers of MXene, MXene will lose water due to heat and produce a small shrinkage deformation, while polyethylene has a large thermal expansion coefficient and can produce a large deformation when heated, which eventually causes the MXene / polyethylene / nano-Ag flexible light-concentrating material to produce asymmetric deformation and bend toward the MXene side, making the optical drive film as a whole tend to be flat. MXene has oxygen-containing functional groups inside. When the light intensity decreases, the light intensity received by MXene decreases, and the temperature also decreases accordingly. At this time, the oxygen-containing functional groups absorb moisture in the air, and the shrinkage deformation of MXene and polyethylene are reduced. The MXene / polyethylene / nano-Ag flexible light-concentrating material can be restored to its original shape and bend in a process opposite to the above, thereby realizing the photosensitivity and automatic opening and closing of the optical drive film 62.

[0053] Example 2

[0054] A method for preparing an optical drive film for a table lamp capable of adaptively driving and adjusting a diffuse light angle comprises the following steps:

[0055] (1) Preparation of MXene solution: 6 g of TiALC2 powder was added to 70 ml of LiF / HCl mixed solution, wherein the LiF / HCl mixed solution contained 7 g of LiF; the mixture was stirred for 24 h at 60 °C to obtain a uniform mixture; the mixture was then washed and centrifuged until the pH value of the supernatant was higher than 6; the precipitate after centrifugation was dispersed in deionized water and ultrasonically treated for 2 h to obtain a MXene solution, wherein the concentration of the MXene solution was 5 mg / ml.

[0056] (2) Preparation of MXene film 621: Take 5 ml of MXene solution with a pipette, add deionized water to a total volume of 50 ml, and stir to obtain a mixed solution; place a cellulose microporous filter membrane 624 with a pore size of 0.22 μm on the sieve plate of the filter head, align the filter cup with the sieve plate and clamp it with a clamp, when the hose connects the filter head and the circulating water vacuum pump, turn on the vacuum pump power, and use a glass rod to drain the MXene solution into the filter cup for vacuum filtration. The filtration time is 2 hours to obtain a wet MXene film 621; then dry the MXene film 621 together with the filter membrane 624 at room temperature for 4 hours to obtain a MXene / filter membrane double-layer membrane. The MXene film 621 with a layered structure is above the filter membrane 624. The thickness of the MXene film 621 is 3 μm.

[0057] (3) Preparation of MXene / polyethylene flexible material: Place the MXene / filter membrane double-layer film horizontally on paper, and attach a polyethylene tape 622 with sticky single side to the surface of the MXene film 621 along the length direction of the tape to obtain a polyethylene / MXene / filter membrane three-layer structure. The MXene / polyethylene flexible material is located above the filter membrane 624.

[0058] (4) Preparation of optical drive film 62: Using filter membrane 624 as the substrate, a rectangular film with a size of 25 mm × 15 mm is cut out along the length direction of polyethylene tape 622, and then the rectangular film is cut out to form a petal-shaped optical drive film 62; then, nano-Ag is sprayed on the inner wall of the lower part of polyethylene tape 622 by magnetron sputtering to form a nano-Ag layer 623, that is, MXene / polyethylene / nano-Ag flexible focusing material is prepared; finally, the filter membrane 624 is peeled off to prepare the optical drive film 62, the thickness of the optical drive film 62 is 45 μm, and the initial bending angle is 30°.

[0059] Example 3

[0060] A method for preparing an optical drive film for a desk lamp capable of adaptively driving and adjusting a diffuse light angle comprises the following steps:

[0061] (1) Preparation of MXene solution: 7 g of TiALC2 powder was added to 75 ml of LiF / HCl mixed solution, wherein the LiF / HCl mixed solution contained 8 g of LiF; the mixture was stirred for 24 h at 60 °C to obtain a uniform mixture; the mixture was then washed and centrifuged until the pH value of the supernatant was higher than 6; the precipitate after centrifugation was dispersed in deionized water and ultrasonically treated for 2 h to obtain a MXene solution, wherein the concentration of the MXene solution was 10 mg / ml.

[0062] (2) Preparation of MXene film 621: Take 2 ml of MXene solution with a pipette, add deionized water to a total volume of 40 ml, and stir to obtain a mixed solution; place a cellulose microporous filter membrane 624 with a pore size of 0.22 μm on the sieve plate of the filter head, align the filter cup with the sieve plate and clamp it with a clamp, when the hose connects the filter head and the circulating water vacuum pump, turn on the vacuum pump power, and use a glass rod to drain the MXene solution into the filter cup for vacuum filtration. The filtration time is 5 hours to obtain a wet MXene film 621; then dry the MXene film 621 together with the filter membrane 624 at room temperature for 8 hours to obtain a MXene / filter membrane double-layer membrane. The MXene film 621 with a layered structure is above the filter membrane 624. The thickness of the MXene film 621 is 10 μm.

[0063] (3) Preparation of MXene / polyethylene flexible material: Place the MXene / filter membrane double-layer film horizontally on paper, and attach a polyethylene tape 622 with sticky single side to the surface of the MXene film 621 along the length direction of the tape to obtain a polyethylene / MXene / filter membrane three-layer structure. The MXene / polyethylene flexible material is located above the filter membrane 624.

[0064] (4) Preparation of optical drive film 62: Using filter membrane 624 as the substrate, cut out a rectangular film of 25 mm × 15 mm along the length direction of polyethylene tape 622, and then cut out a petal-shaped optical drive film 62 from the rectangular film; then, spray nano-Ag on the inner wall of the lower part of polyethylene tape 622 by magnetron sputtering to form a nano-Ag layer 623, thereby preparing MXene / polyethylene / nano-Ag flexible focusing material; finally, peel off filter membrane 624 to prepare optical drive film 62, the thickness of optical drive film 62 is 48 μm, and the initial bending angle is 45°.

[0065] Comparative Example 1

[0066] A method for preparing an optical drive film for a table lamp capable of adaptively driving and adjusting the astigmatism angle is different from that of Example 1 in that the nano-Ag layer 623 is not sprayed on the polyethylene tape 622, and the other preparation steps are the same.

[0067] Example 4

[0068] The optical drive film 62 obtained in Example 1 and Comparative Example 1 was tested for its optical drive response performance. The test results are as follows: Figure 3 As shown in the figure, it can be seen that when the light intensity is generally 5-30mW / cm 2 In the range of 10 mW / cm 2 Under low light intensity irradiation, the optical drive film 62 of Example 1 has a bending deformation angle of 42.54°, while the bending deformation angle of Comparative Example 1 is only 19°. This is because after spraying the nano-Ag layer 623, the adaptive focusing characteristics brought by the reflection of nano-Ag improve the sensitivity of the MXene / polyethylene / nano-Ag flexible focusing material to light intensity. The excellent light-to-heat conversion performance and thermal conductivity of MXene make the optical drive film 62 have good light response performance. Even under low light intensity stimulation, it has a large bending deformation ability, which can meet the requirements of ordinary desk lamps at 5 to 30 mW / cm 2 Under low light intensity, the optical drive film 62 is required to bend and deform.

[0069] Example 5

[0070] A desk lamp with adaptive driving and adjusting astigmatism angle, referring to Figure 4 , Figure 5 The table lamp with adaptive driving and adjusting astigmatism angle comprises a lamp holder 1, a lamp housing 2, a lamp body 3, a dimmer 4, a power supply 5 and a diffusing cover 6. The lamp holder 1 comprises a base clamp 11, a lamp pole 12 and a lamp holder seat 13. The base clamp 11 adopts a spring clamp, and the two clamping plates of the spring clamp are hinged by a spring, and one of the clamping plates is arranged horizontally. The lamp pole 12 is a metal hose wrapped in a plastic shell, one end of which is fixedly connected to the inclined clamping plate of the base clamp 11, and the other end is fixedly connected to the lamp holder seat 13.

[0071] Reference Figure 4 , Figure 5 , the lamp housing 2 is fixedly mounted on the lamp holder 13, the lamp holder 13 is connected to the power source 5 through the lamp line 14, and the dimmer 4 is mounted on the lamp line 14 between the lamp holder 13 and the power source 5. The lamp body 3 is fixedly mounted in the lamp housing 2 and is electrically connected to the lamp holder 13. The lamp body 3 adopts a low-voltage light strip or LED lamp beads, the power source 5 adopts a battery pack or a mobile power supply device, and the dimmer 4 adopts a dimming controller. When in use, place the base clip 11 on a horizontal plane, or clamp and fix it on other objects such as tables and chairs, start the power source 5 to supply power to the lamp body 3, and turn the lamp pole 12 to rotate the lamp housing 2 and the lamp body 3, which is suitable for use in narrow environments; the light intensity of the lamp body 3 can also be adjusted by the dimmer 4. It is easy to use and can be conveniently carried, and is suitable for home reading, outdoor lighting and other places.

[0072] Reference Figure 4 , Figure 5 The diffuser cover 6 includes a mounting seat 61 and a plurality of optical drive films 62. The mounting seat 61 is a truncated cone structure with a stepped transition surface, and its interior is hollow. The optical drive film 62 is in the shape of a petal, and its root is glued and fixed on the outer surface of the mounting seat 61, and the polyethylene layer of the optical drive film 62 is close to one side of the mounting seat 61 and fits with the stepped transition surface of the mounting seat 61. When installing the diffuser cover 6, the mounting seat 61 is sleeved outside the lamp body 3 and fixedly installed in the lamp housing 2. At this time, the petal-shaped optical drive film 62 is coated on the outside of the lamp body 3, and thus the cover is arranged on the lamp body 3, forming a closed bionic flower shape, which has a strong aesthetics and can also play a role in preventing dust when the table lamp is placed for a long time. When a wide range of strong light is required, the dimmer 4 is adjusted to increase the light intensity of the lamp body 3. At this time, the MXene / polyethylene / nano-Ag flexible light-concentrating material produces an asymmetric deformation and bends toward the MXene side, thereby driving the optical drive film 62 to open, so that the lamp body 3 has a larger illumination range and ensures the lighting effect; when a small range of lighting is required, the dimmer 4 is adjusted to reduce the light intensity of the lamp body 3. At this time, the shape of the MXene / polyethylene / nano-Ag flexible light-concentrating material is restored, thereby driving the optical drive film 62 to close, thereby blocking part of the light from the lamp body 3 and reducing the illumination range so as not to affect others. It is suitable for different lighting scenes.

[0073] Principle and advantages of use: This application utilizes TiALC2 and LiF to form a MXene material with a two-dimensional structure, which has a transition metal carbide, nitride or carbonitride structure with a thickness of several atomic layers. The adaptive focusing characteristics brought by the reflection of the sprayed nano-Ag layer 623 improve the sensitivity of the MXene / polyethylene / nano-Ag flexible focusing material to light intensity. The excellent light-to-heat conversion performance and thermal conductivity of MXene make the optical drive film 62 have good light response performance. When irradiated with strong light, MXene converts light energy into heat energy and transfers the heat to polyethylene; at the same time, MXene loses water and produces a small shrinkage deformation when heated, and polyethylene produces a large deformation when heated, which eventually causes the MXene / polyethylene / nano-Ag flexible focusing material to produce asymmetric deformation and bend toward one side of MXene; when the light intensity decreases, the temperature of MXene decreases, and the oxygen-containing functional groups therein absorb moisture in the air. At this time, the shrinkage deformation of MXene and polyethylene is reduced, and the MXene / polyethylene / nano-Ag flexible focusing material returns to its original shape according to the reverse process of the above, realizing the automatic opening and closing of the optical drive film 62 when it is sensitive to light.

[0074] In the present application, the optical drive film 62 is coated on the outside of the lamp body 3. Since the MXene / polyethylene / nano-Ag flexible light-concentrating material is highly sensitive to temperature, the optical drive film 62 can be opened under strong light from the lamp body 3 and closed under weak light, and the opening angle increases with the increase of light intensity, so that the light can be adaptively focused to adjust the diffusion angle of the desk lamp. When a wide range of strong light is required, the dimmer 4 is adjusted to increase the light intensity of the lamp body 3. At this time, the MXene / polyethylene / nano-Ag flexible light-concentrating material produces asymmetric deformation and bends toward the MXene side, thereby driving the optical drive film 62 to flatten and open, so that the lamp body 3 has a larger illumination range and ensures the lighting effect; when a small range of lighting is required, the dimmer 4 is adjusted to reduce the light intensity of the lamp body 3. At this time, the shape of the MXene / polyethylene / nano-Ag flexible light-concentrating material is restored and bent, thereby driving the optical drive film 62 to close, which can block part of the light from the lamp body 3 and reduce the illumination range so as not to affect others, thereby achieving the purpose of automatically adjusting the illumination range according to the usage scenario and avoiding the complex circuit design brought by multiple sensors, so that the desk lamp has the advantages of simple structure, easy to carry and wide range of application.

[0075] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing an optical drive film for a desk lamp capable of adaptively driving and adjusting the astigmatism angle, characterized in that: The steps include: (1) Preparation of MXene solution: TiALC2 powder is added to a LiF / HCl mixed solution, and the mixture is continuously stirred to obtain a uniform mixture, and the mixture is then washed and centrifuged until the pH value of the supernatant is higher than 6; the precipitate after centrifugation is then dispersed in deionized water, and a MXene solution is obtained after ultrasonic treatment; (2) Preparation of MXene film: Mixing MXene solution with deionized water, vacuum filtering the mixed solution to obtain a wet MXene film, and then drying the MXene film together with the filter membrane at room temperature to obtain a MXene / filter membrane double-layer membrane, where the MXene film is located above the filter membrane; (3) Preparation of MXene / polyethylene flexible double-layer membrane: The MXene / filter membrane double-layer membrane is placed horizontally on a piece of paper, and a single-sided sticky polyethylene tape is attached to the surface of the MXene film to obtain a polyethylene / MXene / filter membrane three-layer structure, where the MXene / polyethylene flexible double-layer membrane is located above the filter membrane; (4) Preparation of optical drive film: Using the filter membrane as the substrate, the MXene / polyethylene flexible double-layer film is cut into a pre-designed shape; then, a nano-Ag layer is sprayed on the inner wall of one side of the polyethylene layer to prepare a MXene / polyethylene / nano-Ag flexible focusing material; finally, the filter membrane is peeled off to obtain the optical drive film.

2. The method for preparing the optical drive film of the desk lamp capable of adaptively driving and adjusting the astigmatism angle according to claim 1, characterized in that: In the step (1), the mass ratio of TiALC2 to LiF is 1-1.2:1.2-1.5; the stirring temperature is 60° C., and the stirring time is 24 h; and the concentration of the prepared MXene solution is 5-10 mg / ml.

3. The method for preparing an optical drive film for a table lamp capable of adaptively driving and adjusting the astigmatism angle according to claim 1, characterized in that: In the step (2), the concentration of the solution after mixing the MXene solution and deionized water is 0.1-0.25 mg / ml; the filtration time is 2-5 h, and the drying time is 4-8 h; the thickness of the MXene film is 3-10 μm.

4. The method for preparing an optical drive film for a table lamp capable of adaptively driving and adjusting the astigmatism angle according to claim 1, characterized in that: In the step (3), the MXene film is pasted along the length direction of the polyethylene tape.

5. The method for preparing the optical drive film of the desk lamp capable of adaptively driving and adjusting the astigmatism angle according to claim 1, characterized in that: In the step (4), the thickness of the optical drive film is 45-50 μm, and the bending angle of the optical drive film is in the range of 30°-60°.

6. An adaptively driven desk lamp for adjusting the astigmatism angle, comprising a lamp holder, a lamp housing mounted on the lamp holder, a lamp body mounted in the lamp housing, and a dimmer for adjusting the light intensity of the lamp body, characterized in that: A diffuser cover arranged on the lamp body is installed in the lamp housing, and the diffuser cover includes a light-driving film wrapped around the lamp body. The light-driving film is prepared by the method for preparing a light-driving film for a desk lamp with adaptive driving and adjusting diffuser angle as described in any one of claims 1 to 5, and nano-Ag in the light-driving film is arranged close to one side of the lamp body.

7. The table lamp with adaptive driving and adjusting astigmatism angle according to claim 6 is characterized in that: The light diffuser also includes a mounting seat fixedly mounted in the lamp housing. The optical drive film is in a petal shape, and the root of the optical drive film is fixedly connected to the mounting seat.

8. The table lamp with adaptive driving and adjusting astigmatism angle according to claim 6, characterized in that: The nano-Ag of the optical drive film is coated on the inner wall of one side of the polyethylene layer.

9. The table lamp with adaptive driving and adjusting astigmatism angle according to claim 6, characterized in that: The lamp holder comprises a base clamp, a lamp pole and a lamp holder seat, one end of the lamp pole is fixedly connected to the base clamp, and the other end is fixedly connected to the lamp holder seat, the lamp pole is a metal hose wrapped in a plastic shell, and the lamp shell is fixedly installed on the lamp holder seat.

10. The table lamp with adaptive driving and adjusting astigmatism angle according to claim 6, characterized in that: The desk lamp also includes a power supply for supplying power to the lamp body. The lamp body adopts a low-voltage light strip or LED lamp beads, the dimmer adopts a dimming controller, and the power supply adopts a battery pack or a mobile power supply device.

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