Design and preparation method of graphene wave-absorbing honeycomb based on 3D printing
Through 3D printing technology combining graphene and photocuring resin, graphene absorbing cells with broadband absorption properties were prepared, which solved the shortcomings of honeycomb structural materials in mechanical properties and electromagnetic wave absorption properties, and achieved efficient electromagnetic wave loss and expanded applications.
Patent Information
- Application Number
- CN202510476070.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2025-08-15
AI Technical Summary
The mechanical properties and electromagnetic wave absorption performance of existing honeycomb composite materials are difficult to meet high requirements at the same time, and traditional molding methods are difficult to achieve accurate molecular and microcontrol, and existing materials have limitations in electromagnetic wave absorption performance.
Using 3D printing technology combined with graphene and photocuring resin, graphene absorbing honeycombs with broadband absorption properties are prepared through gradient design and layer-by-layer molding. The electromagnetic characteristics of graphene and the multiple reflection characteristics of the honeycomb structure are used to achieve high-efficiency losses of electromagnetic waves.
It has achieved graphene absorbing cells with good mechanical properties and broadband absorption performance, meeting complex performance needs and expanding the application fields of honeycomb structures.
Smart Images
Figure CN120481273A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a design of a graphene wave-absorbing honeycomb based on 3D printing and a preparation method thereof, belonging to the technical field of wave-absorbing material preparation. Background Art
[0002] Honeycomb sandwich structures offer higher stiffness at lower weight, reducing energy consumption and providing design versatility. Lightweight and robust honeycomb materials have long been used in a variety of engineering applications. However, current honeycomb composites still rely on traditional molding methods. The demand for increasingly high mechanical properties requires precise molecular and microscopic control of the building blocks. This can be achieved through additive manufacturing or 3D printing. Furthermore, the performance requirements for honeycomb structures are becoming increasingly complex, and functionalization of honeycomb structures is a major approach to expanding their applications. Graphene, a two-dimensional layered material, is an excellent electromagnetic wave absorber due to its light weight and high conductivity. Its surface contains numerous functional groups and intrinsic defects that increase dipole polarization. By combining graphene with a printing resin, a printable graphene composite resin has been developed. Due to the unique honeycomb structure, the printed honeycomb exhibits excellent electromagnetic absorption properties while retaining good mechanical properties, thanks to the electromagnetic properties imparted by graphene.
[0003] Therefore, based on 3D printing photocuring technology, this paper combines graphene with photocurable resin, evenly dispersing the graphene in the photocurable resin to develop a printable graphene composite resin. Based on the unique honeycomb structure, it achieves both mechanical properties and excellent wave absorption performance. Summary of the Invention
[0004] The purpose of the present invention is to provide a design and preparation method of a graphene absorbing honeycomb based on 3D printing, and the prepared 3D printed graphene absorbing honeycomb has good mechanical properties and electromagnetic wave absorption performance.
[0005] The present invention also provides a 3D printed graphene wave-absorbing honeycomb produced by the above-mentioned preparation method.
[0006] In order to achieve the above objectives, the technical solution adopted by the 3D-printed graphene absorbing honeycomb of the present invention is:
[0007] A design and fabrication method for a 3D-printed graphene absorbing honeycomb includes the following steps: First, graphene powder and printing resin are combined in a specific mass ratio to form a printing precursor. 3D printing technology is then used to design the honeycomb's thickness, wall thickness, and other parameters using supporting software. The printed slurry is then injected into a trough, and light-curing technology is used to form the absorbing honeycomb layer by layer. A gradient design is employed to achieve a broadband graphene absorbing honeycomb.
[0008] The design and fabrication method for a 3D-printed graphene absorbing honeycomb utilizes photocuring technology to create a macroscopic honeycomb structure. Graphene is then used to modulate its electromagnetic parameters. This macroscopic honeycomb structure allows for multiple reflections of electromagnetic waves within the honeycomb, which reduces electromagnetic wave loss. A gradient design allows for broadband absorption.
[0009] Preferably, the graphene powder is prepared by freeze-drying.
[0010] Preferably, the concentration of the graphene powder before freeze-drying is 1-18 mg / mL, preferably 4-10 mg / mL.
[0011] Preferably, the mass ratio of the graphene powder to the photocurable resin is 1:10-1:100, preferably 1:50.
[0012] Preferably, the number of layers of the gradient design is 2-5 layers, preferably 3-5 layers.
[0013] Preferably, the preparation of the printing precursor includes the following steps: first, the graphene slurry is diluted to different concentrations, then freeze-dried, and the obtained graphene powder is mixed with the resin in a certain mass ratio and stirred evenly.
[0014] Preferably, the establishment of the honeycomb model includes the following steps: first, designing the thickness of the honeycomb, and then establishing honeycomb units with side lengths of 2 and 3 and wall thicknesses of 0.5 and 1, respectively, and periodically arranging and combining them to obtain the honeycomb model.
[0015] Preferably, the supporting software is the model processing software that comes with the 3D printing device, which processes the designed model in layers and designs printing parameters, such as bottom layer exposure time, normal exposure time, return speed, etc.
[0016] Preferably, the printing of the graphene absorbing honeycomb includes the following steps: first, pouring the printing precursor into the material tank, then importing the modified and processed model into the equipment, and then printing and curing the honeycomb layer by layer according to the set printing parameters.
[0017] Preferably, the gradient design of the graphene absorbing honeycomb includes the following steps: first, using simulation software, a multilayer structure is designed with an impedance gradient increasing from top to bottom. By adjusting the electromagnetic parameters and thickness of each layer, a relatively broadband absorbing performance is achieved, thereby determining the electromagnetic parameter distribution and corresponding thickness of each layer in the multilayer structure. Subsequently, the prepared graphene absorbing honeycomb is assembled according to the designed structure.
[0018] The technical solutions adopted in the design and preparation method of the 3D-printed graphene absorbing honeycomb of the present invention are:
[0019] A 3D printed graphene absorbing honeycomb is produced by using the above-mentioned design of the 3D printing-based graphene absorbing honeycomb and its preparation method.
[0020] The design and fabrication method for a 3D-printed graphene absorbing honeycomb utilizes photocuring technology to create a macroscopic honeycomb structure. Graphene is then used to modulate its electromagnetic parameters. This macroscopic honeycomb structure allows for multiple reflections of electromagnetic waves within the honeycomb, which reduces electromagnetic wave loss. A gradient design allows for broadband absorption. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a diagram of a honeycomb model with a wall thickness of 0.5 mm designed in Example 1 of the present invention;
[0022] Figure 2 This is a diagram of a honeycomb model with a wall thickness of 1 mm designed in Example 2 of the present invention;
[0023] Figure 3 This is a physical picture of the graphene wave-absorbing honeycomb prepared in an embodiment of the present invention. DETAILED DESCRIPTION
[0024] The technical solution of the present invention is further described below in conjunction with specific implementation methods.
[0025] Example 1
[0026] The design and preparation method of the graphene absorbing honeycomb based on 3D printing of this embodiment include the following steps:
[0027] 1) Graphene slurries of different concentrations are prepared and then freeze-dried to obtain graphene powder.
[0028] 2) The obtained graphene powder is mixed with the printing resin in a certain mass ratio, and the printing precursor can be obtained after mixing evenly.
[0029] 3) Place the configured printing precursor in the trough and level the 3D printing equipment.
[0030] 4) Design the model in the supporting software. In this embodiment, the side length of the honeycomb is 3 mm, the wall thickness is 0.5 mm, and the thickness of the honeycomb is 20 mm. After the honeycomb model is established, the supporting software is used for slicing, and the honeycomb is divided into 7 layers. The bottom exposure time is set to 100 s, the normal exposure time is 30 s, and the return rate is 0.5 mm / min.
[0031] 5) The honeycomb model obtained in step 4) is imported into a 3D printing device, and the graphene absorbing honeycomb is solidified layer by layer according to the set printing parameters. Subsequently, the electromagnetic parameters of the prepared graphene absorbing honeycomb are tested.
[0032] 6) Based on the electromagnetic parameter test results from step 5), simulation software is used to calculate and design a gradient structure. Different electromagnetic parameters and thicknesses are used for different layers to achieve a wide-band absorbing performance. The prepared graphene absorbing honeycomb is assembled according to the designed structure.
[0033] Example 2
[0034] The design and preparation method of the graphene absorbing honeycomb based on 3D printing of this embodiment include the following steps:
[0035] 1) Graphene slurries of different concentrations are prepared and then freeze-dried to obtain graphene powder.
[0036] 2) The obtained graphene powder is mixed with the printing resin in a certain mass ratio, and the printing precursor can be obtained after mixing evenly.
[0037] 3) Place the configured printing precursor in the trough and level the 3D printing equipment.
[0038] 4) Design the model in the supporting software. In this embodiment, the side length of the honeycomb is 3 mm, the wall thickness is 1 mm, and the thickness of the honeycomb is 5 mm. After the honeycomb model is established, the supporting software is used for slicing, and the honeycomb is divided into 7 layers. The bottom exposure time is set to 100 s, the normal exposure time is 30 s, and the return rate is 0.5 mm / min.
[0039] 5) The honeycomb model obtained in step 4) is imported into a 3D printing device, and the graphene absorbing honeycomb is solidified layer by layer according to the set printing parameters. Subsequently, the electromagnetic parameters of the prepared graphene absorbing honeycomb are tested.
[0040] 6) Based on the electromagnetic parameter test results from step 5), simulation software is used to calculate and design a gradient structure. Different electromagnetic parameters and thicknesses are used for different layers to achieve a wide-band absorbing performance. The prepared graphene absorbing honeycomb is assembled according to the designed structure.
[0041] Example 3
[0042] The design and preparation method of the graphene absorbing honeycomb based on 3D printing of this embodiment include the following steps:
[0043] 1) Graphene slurries of different concentrations are prepared and then freeze-dried to obtain graphene powder.
[0044] 2) The obtained graphene powder is mixed with the printing resin in a certain mass ratio, and the printing precursor can be obtained after mixing evenly.
[0045] 3) Place the configured printing precursor in the trough and level the 3D printing equipment.
[0046] 4) Design the model in the supporting software. In this embodiment, the side length of the honeycomb is 2 mm, the wall thickness is 0.5 mm, and the thickness of the honeycomb is 20 mm. After the honeycomb model is established, the supporting software is used for slicing, and the honeycomb is divided into 7 layers. The bottom exposure time is set to 100 s, the normal exposure time is 30 s, and the return rate is 0.5 mm / min.
[0047] 5) The honeycomb model obtained in step 4) is imported into a 3D printing device, and the graphene absorbing honeycomb is solidified layer by layer according to the set printing parameters. Subsequently, the electromagnetic parameters of the prepared graphene absorbing honeycomb are tested.
[0048] 6) Based on the electromagnetic parameter test results from step 5), simulation software is used to calculate and design a gradient structure. Different electromagnetic parameters and thicknesses are used for different layers to achieve a wide-band absorbing performance. The prepared graphene absorbing honeycomb is assembled according to the designed structure.
[0049] The graphene absorbing honeycomb model designed in step 4) of Example 1 is shown in FIG. Figure 1 ,Depend on Figure 1 It can be seen that the cell units of the honeycomb are well preserved and arranged periodically; the graphene absorbing honeycomb model designed in step 4) of Example 2 is shown in FIG. Figure 1 See Figure 2 The graphene absorbing honeycomb prepared in Examples 1, 2 and 3 is shown in the figure below. Figure 3 shown.
[0050] Experimental example
[0051] The electromagnetic parameters of the graphene absorbing honeycombs prepared in Examples 1, 2, and 3, as well as the absorbing performance of the prepared gradient structure graphene absorbing honeycombs, were tested.
[0052] The test method is to use an Agilent N5244A vector network analyzer to test the electromagnetic parameters of the graphene absorbing honeycomb obtained by the waveguide test method, and to test the absorbing performance of the gradient structure graphene absorbing honeycomb by a bow frame. The electromagnetic wave band is 2-18GHz.
[0053] As can be seen from the above examples, the present invention provides a design and fabrication method for a 3D-printed graphene absorbing honeycomb. This design and fabrication method utilizes photocuring technology to create a macroscopic honeycomb structure and uses graphene to modulate its electromagnetic parameters. This macroscopic honeycomb structure allows for multiple reflections of electromagnetic waves within the honeycomb, which reduces electromagnetic wave loss. A gradient design allows for broadband absorption performance.
[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.
Claims
1. A design and preparation method of a graphene absorbing honeycomb based on 3D printing, characterized by: The following steps are involved: First, graphene powder and printing resin are combined in a specific mass ratio to create a printing precursor. 3D printing technology is then used to design parameters such as honeycomb thickness and wall thickness using supporting software. The printed slurry is then injected into a trough, and light-curing technology is used to form the absorbing honeycomb layer by layer. A gradient design is employed to create a broadband graphene absorbing honeycomb.
2. The design and preparation method of the 3D printed graphene absorbing honeycomb according to claim 1, characterized in that: The graphene powder is prepared by freeze drying, and the concentration of the original slurry is 4-12 mg / mL.
3. The design and preparation method of the 3D printed graphene absorbing honeycomb according to claim 1, characterized in that: The printing resin is a light-curing resin.
4. The design and preparation method of the 3D printed graphene absorbing honeycomb according to claim 1, characterized in that: The wall thickness of the honeycomb is 0.5-2 mm.
5. The design and preparation method of the 3D printed graphene absorbing honeycomb according to claim 1, characterized in that: The thickness of the honeycomb is 5-20 mm.
6. The design and preparation method of the 3D-printed graphene absorbing honeycomb according to any one of claims 1 to 5, characterized in that: The method for compounding graphene powder with photocurable resin includes the following steps: first, freeze-drying graphene slurries of different concentrations to obtain powder, and then mixing the freeze-dried powder with photocurable resin in a certain mass ratio to obtain a printing precursor solution.
7. The design and preparation method of the 3D printed graphene absorbing honeycomb according to claim 1, characterized in that: The 3D printing process includes the following steps: first, placing a printing precursor solution in a printing tank; then, based on supporting software, designing the honeycomb's wall thickness, side length, thickness and other external features; then, performing 3D printing based on the designed model; and curing and printing the honeycomb layer by layer according to set parameters such as exposure time and return speed.
8. The design and preparation method of the 3D printed graphene absorbing honeycomb according to claim 1, characterized in that: The gradient design involves the following steps: Using simulation software, a multilayer structure is designed with an impedance gradient increasing from top to bottom to achieve broadband absorption performance, thereby determining the electromagnetic parameter distribution and corresponding thickness of each layer in the multilayer structure. Subsequently, the prepared graphene absorbing honeycomb is assembled according to the designed structure.
9. A 3D printed graphene absorbing honeycomb manufactured using the design and preparation method of the graphene absorbing honeycomb according to any one of claims 1 to 8.