Flexible composite material with relatively strong self-recovery mechanoluminescence characteristic and preparation method thereof

Abstract

The invention provides a flexible composite material with relatively strong self-recovery mechanoluminescence characteristic and a preparation method thereof. The flexible composite material with the relatively strong self-recovery mechanoluminescence characteristic comprises a flexible carrier, a luminescence functional component and alcohol, the flexible carrier is prepared from polydimethylsiloxane, a PDMS (Polydimethylsiloxane)-A solution and a PDMS-B solution. According to the flexible composite material with the high self-recovery mechanoluminescence characteristic and the preparation method thereof, a polarization electric field caused by the contact electrification effect is greatly enhanced, the luminous intensity and stability are remarkably improved, the controllability is high after technological parameters are optimized, the material performance can be precisely regulated and controlled, and the application prospect is wide. And meanwhile, commercial fluorescent powder and a low-cost active material are adopted, the industrialization threshold is reduced, the finally prepared composite material has excellent flexibility, can tolerate deformation such as bending and stretching, has mechanical stability, has no obvious attenuation of luminescence property after deformation, and can adapt to flexible sensing, anti-counterfeiting and other scenes.

Description

Technical Field

[0001] This invention relates to the field of mechanoluminescent materials and flexible devices, and in particular to a flexible composite material with strong self-recovering mechanoluminescence properties and its preparation method. Background Technology

[0002] Luminescent flexible composite materials are novel materials that combine flexibility and luminescence properties by integrating flexible matrix materials, luminescent functional fillers and additives through a composite molding process. The flexible matrix is ​​mostly an elastomer such as silicone rubber and polyurethane, and the luminescent filler includes functional particles such as phosphors and quantum dots. The material can realize energy conversion and emit light of a specific wavelength under external excitation. At the same time, it has mechanical properties that can be bent, folded and stretched, has good processability and can be adapted to complex curved surfaces.

[0003] The application of flexible composite materials with luminescent properties is concentrated in fields such as flexible electronics, smart wearables, and emergency signage. They can realize functions such as flexible display, dynamic light source, and nighttime warning, adapt to complex curved surfaces and dynamic scenes, and meet application needs that are difficult to cover by traditional rigid luminescent materials. The principle is that the luminescent filler is supported by a flexible matrix. When external excitation sources such as light and electricity act on the filler, it absorbs energy and transitions from the ground state to the excited state. When the energy is released back to the ground state in the form of photons, luminescence is generated. At the same time, the elastic properties of the flexible matrix ensure that the material can maintain stable luminescent performance and structural integrity under bending, folding and other deformations.

[0004] Existing mechanoluminescent flexible composite materials face multiple technical bottlenecks:

[0005] First, traditional materials require pre-irradiation to emit light; without pre-excitation, their performance is weak, and their cycle stability is poor, with brightness decreasing by more than 50% after hundreds of stress cycles.

[0006] Secondly, there is an imbalance between luminescence performance and flexibility. If the phosphor content is low, the brightness will be insufficient to meet the threshold for visual observation. If the content is high, the carrier flexibility will decrease, the bending radius will be greater than 15mm, and it will be prone to cracking.

[0007] Third, simply physically mixing active materials results in poor interfacial bonding, easy separation under stress, weak polarization electric field, and inability to effectively excite luminescent centers;

[0008] Fourth, the process parameters are vague, the material properties are unstable and have poor repeatability, and the sensitivity to small stresses is low, the linear correlation is poor, and the linear range is only 5-20N, which makes it difficult to meet the needs of dynamic sensing, flexible anti-counterfeiting and other scenarios.

[0009] Therefore, it is necessary to provide a flexible composite material with strong self-restoring luminescence properties and its preparation method to solve the above-mentioned technical problems. Summary of the Invention

[0010] This invention provides a flexible composite material with strong self-recovering mechanoluminescence properties and its preparation method, which solves the problem that the mechanoluminescent flexible composite material has bottlenecks in luminescence, balance between softness and brightness, interface bonding, process and stress response, making it difficult to meet the needs of multiple scenarios.

[0011] To solve the above-mentioned technical problems, the flexible composite material with strong self-recovering luminescence properties provided by the present invention includes: a flexible carrier, a luminescent functional component, and alcohol;

[0012] The flexible carrier comprises polydimethylsiloxane, PDMS-A liquid, and PDMS-B liquid, and the luminescent functional component comprises modified LaPO4:Tb. 3+ Ce 3+ Phosphor, original LaPO4:Tb 3+ Ce 3+ Phosphor and AlF3 coating.

[0013] Preferably, the proportion of polydimethylsiloxane in the flexible carrier is 28.6%-50.9%, the proportion of PDMS-A liquid is 25.1%-62.6%, and the proportion of PDMS-B liquid is 0.8%-8.3%.

[0014] Preferably, the luminescent functional component is modified LaPO4:Tb 3+ Ce 3+ The phosphor content ranges from 9.1% to 71.4%, and the original LaPO4:Tb 3+ Ce 3+ The phosphor content ranges from 7.6% to 59.5%, and the AlF3 coating layer accounts for 1.5% to 11.9%.

[0015] Modified LaPO4: Tb 3+ Ce 3+ Phosphor is the core light-emitting unit, enabling it to emit light upon application of force, wherein Ce 3+ Efficiently absorb energy and direct it to Tb 3+ Transport, excitation of luminescence response, original LaPO4:Tb 3+ Ce 3+ Phosphors are used as the luminescent core matrix to provide Ce. 3+ and Tb 3+ As the ion-carrying base, the AlF3 coating layer forms a tight bond with the phosphor through sintering, which enhances the contact electrification ability and improves the luminescence intensity and stability.

[0016] A method for preparing a flexible composite material with strong self-recovering force-luminescence properties, wherein the preparation of the flexible composite material with strong self-recovering force-luminescence properties requires the use of a method for preparing a flexible composite material with strong self-recovering force-luminescence properties, and includes the following steps:

[0017] S1: Select LaPO4:Tb 3+ Ce 3+ Commercial phosphors are filtered through a 100-200 mesh screen in a grinding and filtration device to precisely remove agglomerated particles, ensuring that the phosphors are initially uniform and laying the foundation for subsequent mixing and grinding processes.

[0018] S2: Weigh out the active binary compound AlF3 at a mass ratio of 20%, and mix it with the LaPO4:Tb treated in step one. 3+ Ce 3+ The phosphors were placed together in an agate mortar, and a small amount of alcohol was added as a dispersion medium. The mixture was ground and mixed thoroughly until the material was uniform. Then the mixture was transferred to a crucible and calcined. The calcination temperature was set at 500℃ and the calcination was maintained for 2 hours. After natural cooling to room temperature, the self-healing luminescent phosphor modified by interface engineering was obtained.

[0019] S3: Mix polydimethylsiloxane PDMS-A solution and PDMS-B solution in the corresponding proportion, stir evenly to form PDMS mixture, and then add the modified phosphor prepared in S2 to the mixture, control the mass ratio of phosphor to PDMS in the range of 0.1-2:1, and continue stirring to make the phosphor evenly dispersed in the PDMS mixture.

[0020] S4: Further stir the mixture obtained in S3 until it is homogeneous, and inject it into a preset mold by spin coating or extrusion to remove air bubbles inside the material and make a well-shaped composite material precursor.

[0021] S5: Place the mold containing the precursor into an insulated box or constant temperature box and keep it at a suitable temperature for more than 4 hours to ensure that the PDMS is fully cross-linked and cured. After curing, take out the sample from the mold to finally obtain the phosphate-based self-restoring mechanoluminescent flexible composite material coated with aluminum fluoride.

[0022] A method for preparing a flexible composite material with strong self-recovering luminescence properties, wherein the grinding and filtering equipment in S1 includes a mounting frame;

[0023] The grinding and filtering structure is mounted on the top of the mounting base via a bracket. A drive assembly is mounted on the top of the grinding and filtering structure. A rotating shaft is mounted on the output end of the drive assembly via a connector. A conical grinding head is mounted on the bottom end of the rotating shaft. A cleaning assembly is mounted on the bottom of the conical grinding head.

[0024] Preferably, a conical grinding base is installed near the middle of the interior of the grinding and filtering structure, and a conical intercepting component is installed near the bottom of the interior of the grinding and filtering structure. A slag discharge pipe with a valve is installed at the bottom of the conical intercepting component.

[0025] The bottom of the conical grinding base has an opening to facilitate the discharge of the ground material.

[0026] Preferably, a monitoring component is installed on the top of the grinding and filtering structure, a discharge pipe is installed at the bottom of the grinding and filtering structure, a liquid storage tank is installed on the top of the mounting base, a conveying pipe is installed on the top of the liquid storage tank through a conveying structure, and a spraying component is installed at the other end of the conveying pipe.

[0027] The spraying assembly is installed on the inner surface of the abrasive filter structure near the top, and the delivery structure includes a daily feed and a delivery pump.

[0028] Preferably, a control box with a door is installed on the top of the mounting base frame, and an operation panel is installed on the front of the control box. The mounting base includes a base plate, a mounting structure, and an adjustment structure. The mounting structure is used to install the adjustment structure on the bottom of the base plate.

[0029] The threaded connection between the adjustment structure and the installation structure can adjust the stability of the base plate.

[0030] Preferably, the cleaning assembly includes a fixing head, a connecting shaft, and a cleaning frame. The fixing head is used to mount the connecting shaft to the bottom of the tapered grinding head, and the cleaning frame is mounted on the bottom end of the connecting shaft. The drive assembly includes a protective shell, a drive component, and an angle sensor, and the drive component is mounted inside the protective shell.

[0031] An angle sensor, in conjunction with a drive component controller, can precisely control the rotation speed and angle, and the cleaning frame rotates synchronously with the conical grinding head.

[0032] Preferably, the spraying assembly includes a connector, a diverter pipe, and a plurality of atomizing nozzles. The connector is used to install the diverter pipe to the other end of the delivery pipe, and the plurality of atomizing nozzles are installed on the outer surface of the diverter pipe.

[0033] Compared with related technologies, the flexible composite material with strong self-restoring force luminescence properties and its preparation method provided by the present invention have the following beneficial effects:

[0034] This invention provides a flexible composite material with strong self-recovering luminescence properties and its preparation method. To improve the usability and self-recovery of the flexible composite material with enhanced optical properties, the core material system is specifically designed using LaPO4:Tb. 3+ Ce 3+ Phosphors, as the core light-emitting unit, have a key advantage in Ce. 3+ It can efficiently absorb energy and direct it to Tb 3+ This characteristic, which allows for precise adaptation to the excitation mechanism of mechanoluminescence, provides a foundation for materials to emit light upon stress. To further enhance the intensity of self-restoring mechanoluminescence, a targeted phosphor surface modification process was designed, employing a hybrid sintering method for interface engineering of the phosphor surface. This involves first physically mixing AlF3 and then sintering it, in the LaPO4:Tb phosphor... 3+ Ce 3+ A uniform coating layer is formed on the surface, effectively improving its contact electrification ability and thus enhancing the luminescence response. For the selection of flexible carriers, elastomers such as polydimethylsiloxane and polyurethane are preferred. These carriers not only endow the composite material with excellent flexibility and mechanical resistance, ensuring that the material can be bent to a radius of 5mm without cracking, but also serve as a stable dispersion medium for the phosphor, preventing phosphor agglomeration from affecting luminescence uniformity. This design solves many problems in the fields of traditional mechanoluminescent materials and flexible composite materials. Through the core process of mixing and sintering active materials, the phosphor LaPO4:Tb, which originally had extremely weak self-restoring mechanoluminescence properties, is transformed. 3+ Ce 3+ To achieve highly efficient self-restoring mechanoluminescence, AlF3 and phosphor are calcined to form a tight interface bond, which greatly enhances the polarization electric field caused by the contact electrification effect, significantly improving luminescence intensity and stability. The optimized process parameters are highly controllable, allowing for precise control of material properties. At the same time, the use of commercial phosphors and low-cost active materials lowers the industrialization threshold. The resulting composite material has both excellent flexibility and can withstand bending, stretching and other deformations, as well as mechanical stability. The luminescence performance does not significantly decrease after deformation, making it suitable for flexible sensing, anti-counterfeiting and other scenarios. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a second embodiment of the method for preparing flexible composite materials with strong self-recovering luminescence properties provided by the present invention;

[0036] Figure 2 A schematic diagram of the installation structure is provided for this invention;

[0037] Figure 3 Provided for the present invention Figure 2 An enlarged view of point A shown;

[0038] Figure 4A schematic diagram of the drive component is provided for this invention.

[0039] The diagram is labeled as follows: 1. Mounting base, 101. Base plate, 102. Mounting structure, 103. Adjustment structure, 2. Bracket, 3. Control panel, 4. Control box, 5. Box door, 6. Storage tank, 7. Conveying structure, 8. Conveying pipe, 9. Spraying assembly, 901. Connector, 902. Diverter pipe, 903. Atomizing nozzle, 10. Connector, 11. Monitoring component, 12. Drive assembly, 121. Protective shell, 122. Drive component, 123. Angle sensor, 13. Grinding and filtering structure, 14. Discharge pipe, 15. Conical interception component, 16. Slag discharge pipe, 17. Valve, 18. Cleaning assembly, 181. Fixing head, 182. Connecting shaft, 183. Cleaning frame, 19. Conical grinding base, 20. Conical grinding head, 21. Rotating shaft. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] First Embodiment

[0042] Flexible composite materials with strong self-recovering luminescence properties include: flexible carrier, luminescent functional component, and alcohol;

[0043] The flexible carrier comprises polydimethylsiloxane, PDMS-A liquid, and PDMS-B liquid, and the luminescent functional component comprises modified LaPO4:Tb. 3+ Ce 3+ Phosphor, original LaPO4:Tb 3+ Ce 3+ Phosphor and AlF3 coating.

[0044] The flexible carrier contains 28.6%-50.9% polydimethylsiloxane, the PDMS-A solution contains 25.1%-62.6%, and the PDMS-B solution contains 0.8%-8.3%.

[0045] Polydimethylsiloxane serves as a continuous phase carrier, endowing the composite material with excellent flexibility and mechanical resistance. At the same time, it provides a stable dispersion environment for the phosphor, preventing particle agglomeration. PDMS-A liquid is used to form the basic framework of the carrier, while PDMS-B liquid is used to promote the cross-linking and molding of PDMS-A liquid, ensuring the mechanical properties of the carrier.

[0046] The modified LaPO4:Tb in the luminescent functional component 3+ Ce 3+ The phosphor content ranges from 9.1% to 71.4%, and the original LaPO4:Tb 3+ Ce 3+The phosphor content ranges from 7.6% to 59.5%, and the AlF3 coating layer accounts for 1.5% to 11.9%.

[0047] Modified LaPO4: Tb 3+ Ce 3+ Phosphor is the core light-emitting unit, enabling it to emit light upon application of force, wherein Ce 3+ Efficiently absorb energy and direct it to Tb 3+ Transport, excitation of luminescence response, original LaPO4:Tb 3+ Ce 3+ Phosphors are used as the luminescent core matrix to provide Ce. 3+ and Tb 3+ As the ion-carrying base, the AlF3 coating layer forms a tight bond with the phosphor through sintering, which enhances the contact electrification ability and improves the luminescence intensity and stability.

[0048] A method for preparing a flexible composite material with strong self-recovering force-luminescence properties, wherein the preparation of the flexible composite material with strong self-recovering force-luminescence properties requires the use of a method for preparing a flexible composite material with strong self-recovering force-luminescence properties, and includes the following steps:

[0049] S1: Select LaPO4:Tb 3+ Ce 3+ Commercial phosphors are filtered through a 100-200 mesh screen in a grinding and filtration device to precisely remove agglomerated particles, ensuring that the phosphors are initially uniform and laying the foundation for subsequent mixing and grinding processes.

[0050] S2: Weigh out the active binary compound AlF3 at a mass ratio of 20%, and mix it with the LaPO4:Tb treated in step one. 3+ Ce 3+ The phosphors were placed together in an agate mortar, and a small amount of alcohol was added as a dispersion medium. The mixture was ground and mixed thoroughly until the material was uniform. Then the mixture was transferred to a crucible and calcined. The calcination temperature was set at 500℃ and the calcination was maintained for 2 hours. After natural cooling to room temperature, the self-healing luminescent phosphor modified by interface engineering was obtained.

[0051] S3: Mix polydimethylsiloxane PDMS-A solution and PDMS-B solution in the corresponding proportion, stir evenly to form PDMS mixture, and then add the modified phosphor prepared in S2 to the mixture, control the mass ratio of phosphor to PDMS in the range of 0.1-2:1, and continue stirring to make the phosphor evenly dispersed in the PDMS mixture.

[0052] S4: Further stir the mixture obtained in S3 until it is homogeneous, and inject it into a preset mold by spin coating or extrusion to remove air bubbles inside the material and make a well-shaped composite material precursor.

[0053] S5: Place the mold containing the precursor into an insulated box or constant temperature box and keep it at a suitable temperature for more than 4 hours to ensure that the PDMS is fully cross-linked and cured. After curing, remove the sample from the mold to finally obtain the aluminum fluoride-coated phosphate-based self-restoring mesoluminescent flexible composite material.

[0054] In S2, the high-temperature reaction in the chamber furnace is carried out at 500°C for 2 hours, with a heating rate of 5°C / min to 8°C / min. In S3, the optimal mass ratio of liquid A to liquid B is 10:1. In S3, the optimal mass ratio of phosphor to polydimethylsiloxane is 2:1. In S5, the optimal temperature for placing the precursor in a constant temperature chamber is 70°C.

[0055] The working principle of the flexible composite material with strong self-recovering force-luminescent properties and its preparation method provided by this invention is as follows:

[0056] LaPO4:Tb was selected during the preparation process. 3+ Ce 3+ Commercial phosphors are filtered through a 100-200 mesh sieve to remove agglomerated particles. The active binary compound AlF3 is then mixed with LaPO4:Tb at a ratio of 20%. 3+ Ce 3+ Commercial phosphors were placed in an agate mortar, and a small amount of alcohol was added. The mixture was then thoroughly ground and mixed. The resulting mixture was placed in a crucible and calcined at 500°C for 2 hours. After natural cooling to room temperature, a self-restoring luminescent phosphor modified by interface engineering was obtained. Polydimethylsiloxane solution A and solution B were then mixed in a certain proportion, with solution B accounting for 5%-20%. A certain amount of the phosphor product from step three was added to the obtained polydimethylsiloxane mixture. The mass ratio of phosphor to polydimethylsiloxane was 0.1-1:1. Finally, the mixture of phosphor and polydimethylsiloxane was stirred evenly to form a precursor. The precursor was placed in an incubator and kept at a specific temperature for more than 2 hours to obtain an aluminum fluoride-coated phosphate-based self-restoring luminescent composite.

[0057] Compared with related technologies, the flexible composite material with strong self-recovering force luminescence properties and its preparation method provided by the present invention have the following beneficial effects:

[0058] To improve the usability and self-healing properties of flexible composite materials with enhanced optical properties, the core material system is specifically designed around LaPO4:Tb. 3+ Ce 3+Phosphors, as the core light-emitting unit, have a key advantage in Ce. 3+ It can efficiently absorb energy and direct it to Tb 3+ This characteristic, which allows for precise adaptation to the excitation mechanism of mechanoluminescence, provides a foundation for materials to emit light upon stress. To further enhance the intensity of self-restoring mechanoluminescence, a targeted phosphor surface modification process was designed, employing a hybrid sintering method for interface engineering of the phosphor surface. This involves first physically mixing AlF3 and then sintering it, in the LaPO4:Tb phosphor... 3+ Ce 3+ A uniform coating layer is formed on the surface, effectively improving its contact electrification ability and thus enhancing the luminescence response. For the selection of flexible carriers, elastomers such as polydimethylsiloxane and polyurethane are preferred. These carriers not only endow the composite material with excellent flexibility and mechanical resistance, ensuring that the material can be bent to a radius of 5mm without cracking, but also serve as a stable dispersion medium for the phosphor, preventing phosphor agglomeration from affecting luminescence uniformity. This design solves many problems in the fields of traditional mechanoluminescent materials and flexible composite materials. Through the core process of mixing and sintering active materials, the phosphor LaPO4:Tb, which originally had extremely weak self-restoring mechanoluminescence properties, is transformed. 3+ Ce 3+ To achieve highly efficient self-restoring mechanoluminescence, AlF3 and phosphor are calcined to form a tight interface bond, which greatly enhances the polarization electric field caused by the contact electrification effect, significantly improving luminescence intensity and stability. The optimized process parameters are highly controllable, allowing for precise control of material properties. At the same time, the use of commercial phosphors and low-cost active materials lowers the industrialization threshold. The resulting composite material has both excellent flexibility and can withstand bending, stretching and other deformations, as well as mechanical stability. The luminescence performance does not significantly decrease after deformation, making it suitable for flexible sensing, anti-counterfeiting and other scenarios.

[0059] Second Embodiment

[0060] Please refer to the following: Figures 1-2 - Figures 3-4 , Figure 1 This is a schematic diagram of the structure of a second embodiment of the method for preparing flexible composite materials with strong self-recovering luminescence properties provided by the present invention; Figure 2 A schematic diagram of the installation structure is provided for this invention; Figure 3 Provided for the present invention Figure 2 An enlarged view of point A shown; Figure 4 This invention provides a schematic diagram of the driving component. Based on the first embodiment of this application, which provides a flexible composite material with strong self-recovering force-luminescence properties and its preparation method, the second embodiment of this application proposes another flexible composite material with strong self-recovering force-luminescence properties and its preparation method. The second embodiment is merely a preferred embodiment of the first embodiment, and its implementation will not affect the separate implementation of the first embodiment.

[0061] Specifically, the difference between the flexible composite material with strong self-recovering force luminescence properties and its preparation method provided in the second embodiment of this application is that, in the preparation method of a flexible composite material with strong self-recovering force luminescence properties, the grinding and filtering equipment in S1 includes a mounting base 1.

[0062] A grinding and filtering structure 13 is mounted on the top of a mounting base 1 via a bracket 2. A drive assembly 12 is mounted on the top of the grinding and filtering structure 13. A rotating shaft 21 is mounted on the output end of the drive assembly 12 via a connector 10. A conical grinding head 20 is mounted on the bottom end of the rotating shaft 21. A cleaning assembly 18 is mounted on the bottom of the conical grinding head 20.

[0063] The conical grinding head 20 is inserted into the conical grinding base 19, and the two work together to perform a grinding function, cleaning the top of the component 18 and the conical intercepting component 15.

[0064] Please refer to Figure 1 and Figure 2 A conical grinding base 19 is installed near the middle of the interior of the grinding and filtering structure 13, and a conical intercepting component 15 is installed near the bottom of the interior of the grinding and filtering structure 13. A slag discharge pipe 16 with a valve 17 is installed at the bottom of the conical intercepting component 15.

[0065] The bottom of the conical grinding base 19 has an opening to facilitate the discharge of the ground material.

[0066] Please refer to Figure 1 A monitoring component 11 is installed on the top of the grinding and filtering structure 13, a discharge pipe 14 is installed on the bottom of the grinding and filtering structure 13, a liquid storage tank 6 is installed on the top of the mounting base 1, a conveying pipe 8 is installed on the top of the liquid storage tank 6 through a conveying structure 7, and a spraying component 9 is installed at the other end of the conveying pipe 8.

[0067] The spraying assembly 9 is installed on the inner surface of the abrasive filter structure 13 near the top, and the conveying structure 7 includes a daily conveying pump.

[0068] Please refer to Figure 1 The top of the mounting base 1 is equipped with a control box 4 with a door 5. The front of the control box 4 is equipped with an operation panel 3. The mounting base 1 includes a base plate 101, a mounting structure 102 and an adjustment structure 103. The mounting structure 102 is used to install the adjustment structure 103 on the bottom of the base plate 101.

[0069] The threaded connection between the adjustment structure 103 and the mounting structure 102 can adjust the stability of the base plate 101. The door 5 is equipped with a lock. The control box 4 contains a power switch and a controller for the operation of auxiliary equipment.

[0070] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The cleaning assembly 18 includes a fixing head 181, a connecting shaft 182, and a cleaning frame 183. The fixing head 181 is used to mount the connecting shaft 182 to the bottom of the conical grinding head 20. The cleaning frame 183 is mounted on the bottom end of the connecting shaft 182. The drive assembly 12 includes a protective shell 121, a drive component 122, and an angle sensor 123. The drive component 122 is mounted inside the protective shell 121.

[0071] The angle sensor 123, together with the drive component 122 controller, can precisely control the rotation speed and rotation angle, and the cleaning frame 183 rotates synchronously with the conical grinding head 20.

[0072] Please refer to Figure 1 and Figure 2 The spraying assembly 9 includes a connector 901, a diverter pipe 902, and a plurality of atomizing nozzles 903. The connector 901 is used to install the diverter pipe 902 to the other end of the delivery pipe 8, and the plurality of atomizing nozzles 903 are installed on the outer surface of the diverter pipe 902.

[0073] The diversion tube 202 is fixed on the inner surface of the grinding and filtering structure 13.

[0074] Compared with related technologies, the flexible composite material with strong self-restoring force luminescence properties and its preparation method provided by the present invention have the following beneficial effects:

[0075] To increase the efficiency and precision of grinding and filtering during the preparation of flexible composite materials with luminescent properties, a conical grinding base 19 and a conical grinding head 20 are used in conjunction to improve grinding precision. A conical interceptor 15 is installed below the conical grinding base 19, allowing direct filtering of the ground material and improving efficiency. This first filters the screened LaPO4:Tb... 3 + Ce 3+Phosphor powder and AlF3 are added into the grinding and filtering structure 13 at a mass ratio of 8:2. Then, the conveying structure 7 is activated to spray alcohol into the grinding and filtering structure 13 in the corresponding amount through the spraying component 9. After completion, the drive component 12 is activated to drive the conical grinding head 20 to rotate, which, together with the conical grinding base 19, grinds the raw material. The ground raw material falls from the opening at the bottom of the conical grinding base 19 into the conical intercepting component 15 for filtration, and finally is discharged from the discharge pipe 14 for use. This design improves the efficiency and accuracy of grinding and filtering in the preparation process of flexible composite materials with luminescent properties.

[0076] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A flexible composite material with strong self-restoring force luminescence properties, characterized in that, include: Flexible carrier, luminescent functional component, and alcohol; The flexible carrier comprises polydimethylsiloxane, PDMS-A liquid, and PDMS-B liquid, and the luminescent functional component comprises modified LaPO4:Tb. 3+ Ce 3+ Phosphor, original LaPO4:Tb 3+ Ce 3+ Phosphor and AlF3 coating.

2. The flexible composite material with strong self-restoring force luminescence properties according to claim 1, characterized in that, The flexible carrier contains 28.6%-50.9% polydimethylsiloxane, 25.1%-62.6% PDMS-A solution, and 0.8%-8.3% PDMS-B solution.

3. The flexible composite material with strong self-restoring force-luminescence properties according to claim 1, characterized in that, The modified LaPO4:Tb in the luminescent functional component 3+ Ce 3+ The phosphor content ranges from 9.1% to 71.4%, and the original LaPO4:Tb 3+ Ce 3+ The phosphor content ranges from 7.6% to 59.5%, and the AlF3 coating layer accounts for 1.5% to 11.9%.

4. A method for preparing a flexible composite material with strong self-restoring force luminescence properties, characterized in that, This includes the flexible composite material with strong self-recovering force-luminescence properties as described in any one of claims 1-3. The preparation of this flexible composite material requires a method for preparing a flexible composite material with strong self-recovering force-luminescence properties, comprising the following steps: S1: Select LaPO4:Tb 3+ Ce 3+ The fluorescent powder is filtered through a 100-200 mesh screen in a grinding and filtering device to precisely remove any agglomerated particles, ensuring that the fluorescent powder is initially uniform and laying the foundation for subsequent mixing and grinding processes. S2: Weigh out the active binary compound AlF3 at a mass ratio of 20%, and mix it with the LaPO4:Tb treated in step one. 3+ Ce 3+ The phosphors were placed together in an agate mortar, and a small amount of alcohol was added as a dispersion medium. The mixture was ground and mixed thoroughly until the material was uniform. The mixture was then transferred to a crucible and calcined. The calcination temperature was set at 500℃ and the calcination was maintained for 2 hours. After natural cooling to room temperature, the self-healing luminescent phosphor modified by interface engineering was obtained. S3: Mix polydimethylsiloxane PDMS-A solution and PDMS-B solution in the corresponding proportion, stir evenly to form PDMS mixture, and then add the modified phosphor prepared in S2 to the mixture, control the mass ratio of phosphor to PDMS in the range of 0.1-2:1, and continue stirring to make the phosphor evenly dispersed in the PDMS mixture. S4: Further stir the mixture obtained in S3 until it is homogeneous, and inject it into a preset mold by spin coating or extrusion to remove air bubbles inside the material and make a well-shaped composite material precursor. S5: Place the mold containing the precursor into an insulated box or constant temperature box and keep it at a suitable temperature for more than 4 hours to ensure that the PDMS is fully cross-linked and cured. After curing, take out the sample from the mold to finally obtain the phosphate-based self-restoring mechanoluminescent flexible composite material coated with aluminum fluoride.

5. The method for preparing the flexible composite material with strong self-restoring luminescence properties according to claim 4, characterized in that, The grinding and filtering equipment in S1 includes a mounting frame; The grinding and filtering structure is mounted on the top of the mounting base via a bracket. A drive assembly is mounted on the top of the grinding and filtering structure. A rotating shaft is mounted on the output end of the drive assembly via a connector. A conical grinding head is mounted on the bottom end of the rotating shaft. A cleaning assembly is mounted on the bottom of the conical grinding head.

6. The method for preparing the flexible composite material with strong self-restoring luminescence properties according to claim 5, characterized in that, A conical grinding base is installed near the center inside the grinding and filtering structure, and a conical intercepting component is installed near the bottom inside the grinding and filtering structure. A slag discharge pipe with a valve is installed at the bottom of the conical intercepting component.

7. The method for preparing the flexible composite material with strong self-restoring luminescence properties according to claim 5, characterized in that, A monitoring component is installed on the top of the grinding and filtering structure, a discharge pipe is installed at the bottom of the grinding and filtering structure, a liquid storage tank is installed on the top of the mounting base, a conveying pipe is installed on the top of the liquid storage tank through a conveying structure, and a spraying component is installed at the other end of the conveying pipe.

8. The method for preparing the flexible composite material with strong self-restoring luminescence properties according to claim 5, characterized in that, A control box with a door is installed on the top of the mounting base. An operation panel is installed on the front of the control box. The mounting base includes a base plate, a mounting structure, and an adjustment structure. The mounting structure is used to install the adjustment structure on the bottom of the base plate.

9. The method for preparing the flexible composite material with strong self-restoring luminescence properties according to claim 5, characterized in that, The cleaning assembly includes a fixing head, a connecting shaft, and a cleaning frame. The fixing head is used to mount the connecting shaft to the bottom of the tapered grinding head. The cleaning frame is mounted on the bottom end of the connecting shaft. The drive assembly includes a protective shell, a drive component, and an angle sensor. The drive component is mounted inside the protective shell.

10. The method for preparing the flexible composite material with strong self-restoring force luminescence properties according to claim 7, characterized in that, The spraying assembly includes a connector, a splitter pipe, and multiple atomizing nozzles. The connector is used to install the splitter pipe to the other end of the delivery pipe, and the multiple atomizing nozzles are installed on the outer surface of the splitter pipe.

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