Ultraviolet radiation resistant ostrich hair moon dust brush and preparation method thereof

Abstract

According to the anti-ultraviolet radiation ostrich hair moon dust brush and the preparation method thereof, under the action of protective gas, plasma is used for cleaning and drying ostrich hair, then a vacuum magnetron sputtering method is adopted, target material aluminum is sputtered to the surface of the cleaned ostrich hair to form a layer of aluminum film, and the anti-ultraviolet radiation ostrich hair moon dust brush is obtained. The service life of the ostrich hair moon dust brush is prolonged, the ultraviolet radiation resistance of the ostrich hair moon dust brush is improved, the ostrich hair is electrified through the electrostatic generator, dust particles can be more effectively adsorbed, and the cleaning efficiency is improved; the physical contact between the bristles and dust is reduced, and the abrasion speed of the moon dust brush is also reduced, so that the service life of the ostrich hair moon dust brush is prolonged.

Description

Technical Field

[0001] The present application relates to the field of aerospace technology, and in particular to an anti-ultraviolet radiation moon dust brush and a preparation method thereof. Background Art

[0002] Moondust is a type of tiny particles widely distributed on the lunar surface, with sizes ranging from about 30 nanometers to 20 microns, of which more than 95% are smaller than 2 microns. Its morphology is complex and varied, mainly composed of glass spheres, bubble structures and angular fragments, containing a large amount of nanoparticles of metallic iron and glass, with the glass content exceeding 50%. In certain parts, especially particles smaller than 2 microns, the glass content is as high as 80% to 90%. Due to its tiny size and complex composition, moondust can easily adhere to the surface of spacecraft, causing damage and contamination of the spacecraft surface, and can also cause spacecraft failures, including mechanical structure jamming, sealing mechanism failure, optical system sensitivity reduction, component wear and thermal control system failure, thus affecting the normal operation of the spacecraft and accurate data collection.

[0003] Nylon brushes and metal fiber brushes face many limitations in the process of removing lunar dust. Nylon brushes have poor wear resistance and the bristles are easily worn after long-term use, resulting in reduced cleaning effect. At the same time, the temperature resistance of nylon materials is limited. In the extreme temperature difference environment of the moon, the bristles may become hard or soft, affecting the performance. Most artificial fabrics and biological hair suitable for dust removal brushes in nature have static electricity. Ostrich feathers are the only biological feathers that do not carry static electricity. They have super dust absorption ability, can absorb fine charged dust particles, and can be shaken lightly to make them fall off. In addition, feathers are soft and will not cause damage to the surface of the equipment. They have been used to make lunar dust brushes to remove lunar dust from space suits, precision spacecraft, etc. However, ostrich feathers are worn due to friction during use, and lunar dust brushes are exposed to the strong ultraviolet radiation on the lunar surface for a long time, and cannot maintain their stable dust removal performance. Summary of the invention

[0004] In view of this, the present application provides an anti-ultraviolet radiation ostrich feather moon dust brush and a preparation method thereof, which solves the technical problem that the moon dust brush in the prior art is worn out due to friction during use when removing moon dust on space suits and precision spacecraft, and its stable dust removal performance cannot be guaranteed.

[0005] According to the first aspect of the present application, the present application provides a method for preparing an ultraviolet radiation resistant ostrich feather moon dust brush, comprising: using plasma to clean and dry the ostrich feathers under the action of a protective gas, and then using a vacuum magnetron sputtering method to sputter a target aluminum onto the surface of the cleaned ostrich feathers to form an aluminum film, wherein the thickness of the aluminum film is 500-800nm, the transmittance of the aluminum film under ultraviolet irradiation is ≤40%, the time for the aluminum film to change color under ultraviolet irradiation is ≥200min, and the time for the aluminum film to fall off under ultraviolet irradiation is ≥300min.

[0006] In a possible implementation, the protective gas is argon, the jet velocity of the argon is 0.7-0.8 m / s, and the gas flow rate of the argon is 40-100 sccm; the cleaning power is 200-500 W, the cleaning time is 2-5 minutes, and the cleaning vacuum is < 50 mTorr; the drying time is 2-4 min, and the drying temperature is 50-70°C.

[0007] In a possible implementation, the length of the ostrich feather is 20-30 mm, the density of the ostrich feather is 0.8-1.0 g / cm³, the elastic modulus of the ostrich feather is 2.0-4.5 GPa, the hollow rate of the ostrich feather is 70%-80%, and the diameter of the central hole of the ostrich feather is 0.1 mm-0.5 mm.

[0008] In one possible implementation, the sputtering gas is argon, the sputtering power of the target material aluminum is 2-5 kWh, the sputtering pressure of the target material aluminum is 4-6 Pa, the sputtering flow rate of the target material aluminum is 70-90 CC / min, the sputtering pressure of the target material aluminum is 4-6 Pa, and the deposition rate of the target material aluminum is 5-20 nm / min.

[0009] According to a second aspect of the present application, the present application provides an anti-ultraviolet radiation ostrich feather moon dust brush, and the moon dust brush is prepared by the preparation method described above.

[0010] In one possible implementation, the moon dust brush includes: ostrich feathers; a base; a first connecting rod, one end of which is detachably connected to the base; an electrostatic switch, which is arranged on the first connecting rod; a brush head copper wire, one end of which passes through the base and is connected to the feather shaft of the ostrich feather; an electrostatic generator, which is arranged in the first connecting rod, one end of which is electrically connected to the brush head copper wire; and the other end of the electrostatic generator is electrically connected to the electrostatic switch.

[0011] In one possible implementation, the moon dust brush also includes: a second connecting rod; a vacuum motor, which is installed at one end of the second connecting rod; a coupling, whose driven shaft is fixedly connected to the first connecting rod; and a driving shaft of the coupling is fixedly connected to the vacuum motor.

[0012] In one possible implementation, the moon dust brush also includes: a power supply; a handle, wherein the power supply is arranged in the handle, and the other end of the second connecting rod is connected to the handle; the power supply is electrically connected to the vacuum motor; a charging plate; a wire, wherein one end of the wire is electrically connected to the charging plate; a plug, wherein the other end of the wire is electrically connected to the plug; and a switch, wherein the switch is arranged on the handle, and the switch is electrically connected to the power supply.

[0013] In a possible implementation, the base is made of copper.

[0014] In one possible implementation, the copper wires of the brush head are arranged in a cross-shaped pattern.

[0015] The present application provides an anti-ultraviolet radiation moon dust brush and a preparation method and application thereof. The bristles of the moon dust brush are ostrich hair with a length of 20-30 mm, a density of 0.8-1.0 g / cm³, and an elastic modulus of 2.0-4.5 Gpa. The ostrich hair is first cleaned and dried using plasma, and then a vacuum magnetron sputtering method is used to sputter a target aluminum onto the surface of the cleaned ostrich hair to form an aluminum film, wherein the thickness of the aluminum film is 500-800 nm, and the transmittance of the aluminum film under ultraviolet radiation is ≤40%. The moon dust brush not only improves the service life and resistance to ultraviolet radiation of the ostrich hair moon dust brush, but also charges the ostrich hair through an electrostatic generator, which can more effectively absorb dust particles and improve cleaning efficiency; the physical contact between the bristles and the dust is reduced, which also reduces the wear rate of the moon dust brush, thereby extending the service life of the ostrich hair moon dust brush. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of the structure of a moon dust removal device provided in one embodiment of the present application; Figure 2 The figure shows a schematic diagram of the structure of the brush head copper wire and the electrostatic switch provided in one embodiment of the present application; Figure 3 Shown is a schematic structural diagram of an electrostatic generator provided in one embodiment of the present application; Figure 4 The figure shows a schematic diagram of the connection structure between ostrich feathers and brush head copper wires provided in one embodiment of the present application; Figure 5 The figure shows a schematic diagram of the connection structure between the brush head copper wire and the base provided in one embodiment of the present application; Figure 6 Shown is a schematic diagram of the connection structure between a base and a connecting rod provided in one embodiment of the present application.

[0017] Description of reference numerals: 1. Brush head copper wire; 2. Base; 3. Electrostatic switch; 4. Coupling; 5. Vacuum motor; 61. First connecting rod; 62. Second connecting rod; 7. Power supply; 71. Plug; 8. Switch; 9. Charging board; 10. Handle; 11. Wire; 12. Ostrich feather; 13. Feather shaft; 14. Electrostatic generator. DETAILED DESCRIPTION

[0018] In the description of the application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically limited. In the embodiment of the present application, all directional indications (such as up, down, left, right, front, back, top, bottom ...) are only used to explain the relative position relationship, motion conditions, etc. between the components under a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their deformations are intended to cover non-exclusive inclusions. For example, the process, method, system, product or equipment comprising a series of steps or units are not limited to the steps or units listed, but optionally also include the steps or units not listed, or optionally also include other steps or units inherent to these processes, methods, products or equipment.

[0019] In addition, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] Figure 1 The figure is a schematic diagram of the structure of a moon dust removal device provided in one embodiment of the present application; Figure 2 The figure shows a schematic diagram of the structure of the brush head copper wire and the electrostatic switch provided in one embodiment of the present application; Figure 3 Shown is a schematic structural diagram of an electrostatic generator provided in one embodiment of the present application; Figure 4The figure shows a schematic diagram of the connection structure between ostrich feathers and brush head copper wires provided in one embodiment of the present application; Figure 5 The figure shows a schematic diagram of the connection structure between the brush head copper wire and the base provided in one embodiment of the present application; Figure 6 Shown is a schematic diagram of the connection structure between a base and a connecting rod provided in one embodiment of the present application.

[0022] like Figure 1-Figure 6 As shown, the moon dust brush includes: ostrich feather 12, base 2, first connecting rod 61, electrostatic generator 14 and brush head copper wire 1, the base 2 is made of copper; one end of the connecting rod 6 can be threadedly connected to the base 2; electrostatic switch 3, the electrostatic switch 3 is arranged on the first connecting rod 61; one end of the brush head copper wire 1 passes through the base and is connected to the feather shaft 13 of the ostrich feather 12, the electrostatic generator 14 is arranged in the first connecting rod 61, one end of the electrostatic generator 14 is electrically connected to the brush head copper wire 1; the other end of the electrostatic generator 14 is electrically connected to the electrostatic switch 3.

[0023] Specifically, the ostrich feather 12 is electrically connected to the brush head copper wire 1, and the brush head copper wire 1 is electrically connected to the electrostatic switch 3. When the space suit needs to be dusted in space, the electrostatic switch 3 is turned on to make the ostrich feather 12 have static electricity, and the electrostatic effect is used to remove dust, which increases the dust adsorption amount and makes the dust removal more thorough.

[0024] In a possible embodiment, the moon dust brush also includes: a second connecting rod 62, a coupling 4, and a vacuum motor 5; the vacuum motor 5 is installed at one end of the second connecting rod 62, the coupling 4, the coupling 4 connects the first connecting rod 61 and the second connecting rod 62, and is used to drive the first connecting rod 61 to rotate, the driven shaft of the coupling 4 is fixedly connected to the bottom of the base 2; the driving shaft of the coupling 4 is fixedly connected to the vacuum motor 5.

[0025] In a vacuum environment, the vacuum motor 5 drives the moon dust brush to rotate and remove dust, and the astronauts do not need to manually intervene, and the device can efficiently remove moon dust. The astronauts can hold it to perform convenient dust removal, or two astronauts can interactively remove dust. This effectively solves the problem that astronauts cannot conveniently remove dust while wearing gloves.

[0026] It should be understood that in the present application, the coupling 4 can use a rigid GY-type flange coupling, the national standard model is GB / T5843-2003, the vacuum motor 5 is a KVM4248D-HT-V5 vacuum high and low temperature stepping system, the vacuum stepping motor complies with the AS9100D aerospace certification standard, and the vacuum stepping motor can be used in the lunar surface environment. The vacuum stepping motor is driven by the rigid GY-type flange coupling 4, and can drive the lunar dust brush to rotate at high speed, thereby peeling the lunar dust off the surface.

[0027] In a possible embodiment, the moon dust brush also includes: a power supply 7, a handle 10, a charging plate 9, a wire 11, a plug 71, and a switch 8. The handle 10 is arranged at the other end of the second connecting rod 62, the power supply 7 is arranged in the handle 10, and the power supply 7 is electrically connected to the vacuum motor 5; one end of the wire 11 is electrically connected to the charging plate 9; the other end of the wire 11 is electrically connected to the plug 71; the plug 71 is arranged on the power supply 7, the switch 8 is arranged on the handle 10, and the switch 8 is electrically connected to the power supply 7.

[0028] Specifically, the charging panel 9 can be a solar panel, which is connected to the power supply 7 at the bottom of the device. When the astronauts are not out of the cabin, it can be mounted outside the cabin and charged by solar energy. It can be charged autonomously during the lunar daytime to extend the battery life, which is very useful especially for long-term lunar missions.

[0029] In one possible implementation, the base is made of copper, which is an excellent conductive material that can effectively and evenly distribute static electricity on the feathers to ensure the effectiveness of the moon dust brush. Copper has good ductility and can be processed into various shapes. Copper has good corrosion resistance and can extend the service life of the moon dust brush.

[0030] In a possible implementation, the brush head copper wire 1 is arranged in a cross-shaped pattern. The cross-shaped brush head can work in multiple directions, whether it is brushing in a straight line or in a circle, it can maintain a good cleaning or smearing effect. Due to the cross-arrangement of the bristles, it can more effectively remove stains and impurities during cleaning, thereby improving the cleaning efficiency.

[0031] Example 1 Select ostrich feathers with a length of 25 mm, a density of 1.01.0 g / cm³, an elastic modulus of 3 GPa, and a hollow ratio of 80%. First, use plasma to clean the ostrich feathers under the action of protective gas to remove pollutants such as grease and dust on the surface. The protective gas is argon gas, the jet velocity of argon gas is 0.8 m / s, and the gas flow rate of argon gas is 40 sccm; the cleaning power is 200 W; the cleaning time is 2 minutes; the cleaning vacuum degree is < 50 mTorr, and the cleaned ostrich feathers are placed at 60°C for drying for 3 minutes, and then the dried ostrich feathers are fixed on the base, placed in the sputtering chamber of the magnetron sputtering instrument, and the chamber is closed; the vacuum pump is turned on to extract the air in the chamber to reach a low vacuum environment (usually at 10^ -5 to 10^ -6Torr). A 99.999% pure aluminum target was selected, the sputtering pressure was 5 Pa, argon (Ar) was used as the sputtering gas, the substrate (ostrich feather) temperature was greater than 50°C; the sputtering power was 5 kilowatt-hours, the deposition rate of the target aluminum was 20 nm / min, and an aluminum film was sputtered on the ostrich feather fixed on the base. The thickness of the aluminum film was 500nm-800nm.

[0032] The coating success rate of the coated ostrich feathers was evaluated by visual inspection to record whether the coating was uniform and whether there were any defects. It was observed that the coating success rate of Example 1 was 90%.

[0033] The coating efficiency of the coated ostrich feathers was evaluated, that is, the time required to achieve an ideal coating effect was recorded. After evaluation, the coating efficiency of Example 1 was 3 minutes / sample.

[0034] The adhesion of the coated ostrich feathers was tested. A certain number of grid lines (usually 6×6, a total of 36 small squares) were drawn on the surface of the coating using a grid knife. The transparent tape was pressed hard to make it close to the drawn area, and then quickly torn off. The degree of coating shedding was observed and recorded. The evaluation criteria were: Level 5: No coating shedding. Level 4: Less than 5% of the coating shedding. Level 3: 5%-15% of the coating shedding. Level 2: 15%-35% of the coating shedding. Level 1: 35%-65% of the coating shedding. Level 0: More than 65% of the coating shedding. After evaluation, the coating shedding of Example 1 was level 5, and the coating did not shed.

[0035] The coated ostrich feathers were placed under a UV lamp for an anti-UV radiation test. The coated ostrich feathers were irradiated with a UV lamp with a wavelength of 254nm. After irradiation for more than 200 minutes, the color of the aluminum film on the surface of the ostrich feathers changed from silvery white or light gray to dark gray, black or mottled colors, and tiny pores appeared on the surface of the aluminum film. After irradiation for more than 300 minutes, the aluminum film on the surface of the ostrich feathers fell off or deformed. The transmittance before and after UV irradiation was tested using a UV intensity detector. The test showed that the transmittance of the coated ostrich feathers before UV irradiation was 60%, and the transmittance of the coated ostrich feathers after UV irradiation was 40%.

[0036] Evaluation of dust removal efficiency of coated ostrich feather moon dust brush: Use ostrich feather moon dust brush to conduct dust removal test on cerium-doped glass. Before and after each dust removal test, use electronic balance to weigh the mass of simulated moon dust to calculate dust removal efficiency. Dust removal efficiency = (dust mass before test - dust mass after test) / dust mass before test × 100%. Conduct at least 5 dust removal tests and obtain the average value. After calculation, the dust removal efficiency is 99.5%.

[0037] Comparative Example 1 Select ostrich feathers with a length of 25 mm, a density of 1.01.0 g / cm³, an elastic modulus of 3 GPa, and a hollow ratio of 80%. Fix the ostrich feathers on a base, then put them into the sputtering chamber of the magnetron sputtering instrument and close the chamber. Turn on the vacuum pump to extract the air in the chamber to achieve a low vacuum environment (usually 10^ -5 to 10^ -6 Aluminum target with a purity of 99.999% was selected, the sputtering pressure was 5 Pa, argon (Ar) was used as the sputtering gas, the substrate (ostrich feather) temperature was greater than 50°C; the sputtering power was 5 kWh, the deposition rate of the target aluminum was 20 nm / min, and a layer of aluminum film was sputtered on the ostrich feather fixed on the base, and the thickness of the aluminum film was between 500nm and 800nm.

[0038] The coating success rate of the coated ostrich feathers was evaluated by visual inspection to record whether the coating was uniform and whether there were any defects. It was observed that the coating success rate of Comparative Example 1 was 30%.

[0039] The coating efficiency of the coated ostrich feathers was evaluated, that is, the time required to achieve an ideal coating effect was recorded. After evaluation, the coating efficiency of Comparative Example 1 was 5 minutes / sample.

[0040] The adhesion of the coated ostrich feathers was tested. A grid cutter was used to draw a certain number of grid lines (usually 6×6, a total of 36 small squares) on the surface of the coating. The transparent tape was pressed hard to make it close to the drawn area, and then quickly torn off. The degree of coating shedding was observed and recorded. The evaluation criteria were: Level 5: No coating shedding. Level 4: Less than 5% of the coating shedding. Level 3: 5%-15% of the coating shedding. Level 2: 15%-35% of the coating shedding. Level 1: 35%-65% of the coating shedding. Level 0: More than 65% of the coating shedding. After evaluation, the coating shedding of Comparative Example 1 was Level 2.

[0041] The coated ostrich feathers were placed under a UV lamp for an anti-UV radiation test. The coated ostrich feathers were irradiated with a UV lamp with a wavelength of 254nm. After irradiation for more than 162 minutes, the color of the aluminum film on the surface of the ostrich feathers changed from silvery white or light gray to dark gray, black or mottled colors, and tiny pores appeared on the surface of the aluminum film. After irradiation for more than 258 minutes, the aluminum film on the surface of the ostrich feathers fell off or deformed. The transmittance before and after UV irradiation was tested using a UV intensity detector. The transmittance of the coated ostrich feathers before UV irradiation was 65%, and the transmittance of the coated ostrich feathers after UV irradiation was 53%.

[0042] After coating, the dust removal efficiency of the coated ostrich feather moon dust brush was evaluated: The dust removal test was carried out on the cerium-doped glass using an ostrich feather moon dust brush. Before and after each dust removal test, the mass of simulated moon dust was weighed using an electronic balance to calculate the dust removal efficiency. Dust removal efficiency = (dust mass before test - dust mass after test) / dust mass before test × 100%. At least 5 dust removal tests were carried out to obtain the average value. The dust removal efficiency was calculated to be 98.6%.

[0043] Comparative Example 2 Select ostrich feathers with a length of 25 mm, a density of 1.01.0 g / cm³, an elastic modulus of 3 GPa, and a hollow ratio of 80%. Use 600-grit sandpaper to gently polish the surface of the ostrich feathers for about 1 minute. Then fix the sandpaper-polished ostrich feathers on the base, put them into the sputtering chamber of the magnetron sputtering instrument, and close the chamber. Turn on the vacuum pump to extract the air in the chamber to achieve a low vacuum environment (usually 10^ -5 to 10^ -6 Aluminum with a purity of 99.999% was selected as the target material, the sputtering pressure was 5 Pa, argon (Ar) was used as the sputtering gas, the substrate (ostrich feather) temperature was greater than 50°C; the sputtering power was 5 kWh, the deposition rate of the target aluminum was 20 nm / min, and the thickness of the aluminum film was between 500nm-800nm.

[0044] The coating success rate of the coated ostrich feathers was evaluated by visual inspection to record whether the coating was uniform and whether there were any defects. It was observed that the coating success rate of Comparative Example 2 was 50%.

[0045] The coating efficiency of the coated ostrich feathers was evaluated, that is, the time required to achieve an ideal coating effect was recorded. After evaluation, the coating efficiency of Comparative Example 2 was 4.5 minutes / sample.

[0046] The adhesion of the coated ostrich feathers was tested. A grid knife was used to draw a certain number of grid lines (usually 6×6, a total of 36 small squares) on the surface of the coating. The transparent tape was pressed hard to make it close to the drawn area, and then quickly torn off. The degree of coating shedding was observed and recorded. The evaluation criteria were: Level 5: No coating shedding. Level 4: Coating shedding was less than 5%. Level 3: Coating shedding was 5%-15%. Level 2: Coating shedding was 15%-35%. Level 1: Coating shedding was 35%-65%. Level 0: Coating shedding was greater than 65%. After evaluation, the coating shedding of Comparative Example 2 was level 3.

[0047] The coated ostrich feathers were placed under a UV lamp for an anti-UV radiation test. The coated ostrich feathers were irradiated with a UV lamp with a wavelength of 254nm. After irradiation for more than 138 minutes, the color of the aluminum film on the surface of the ostrich feathers changed from silvery white or light gray to dark gray, black or mottled colors, and tiny pores appeared on the surface of the aluminum film. After irradiation for more than 220 minutes, the aluminum film on the surface of the ostrich feathers fell off or deformed. The transmittance before and after UV irradiation was tested using a UV intensity detector. The test showed that the transmittance of the coated ostrich feathers before UV irradiation was 60%, and the transmittance of the coated ostrich feathers after UV irradiation was 45%.

[0048] After coating, the dust removal efficiency of the coated ostrich feather moon dust brush was evaluated: The ostrich feather moon dust brush was used to conduct dust removal tests on cerium-doped glass. Before and after each dust removal test, the mass of simulated moon dust was weighed using an electronic balance to calculate the dust removal efficiency. Dust removal efficiency = (dust mass before test - dust mass after test) / dust mass before test × 100%. At least 5 dust removal tests were conducted to obtain the average value. After calculation, the dust removal efficiency was 99.1%.

[0049] Comparative Example 3 Select ostrich feathers with a length of 25 mm, a density of 1.01.0 g / cm³, an elastic modulus of 3 GPa, and a hollow ratio of 80%. Rinse the ostrich feathers with deionized water at a water flow rate of 2 liters / minute for 2 minutes, then place the washed ostrich feathers at 60°C for drying for 3 minutes, fix the dried ostrich feathers on a base, put them into the sputtering chamber of a magnetron sputtering instrument, and close the chamber; turn on the vacuum pump to extract the air in the chamber to achieve a low vacuum environment (usually at 10^ -5 to 10^ -6 Aluminum target with a purity of 99.999% was selected, the sputtering pressure was 5 Pa, argon (Ar) was used as the sputtering gas, the substrate (ostrich feather) temperature was greater than 50°C; the sputtering power was 5 kWh, the aluminum deposition rate was 20 nm / min, and a layer of aluminum film was sputtered on the ostrich feather fixed on the base, and the thickness of the aluminum film was 500nm-800nm.

[0050] The coating success rate of the coated ostrich feathers was evaluated by visual inspection to record whether the coating was uniform and whether there were any defects. It was observed that the coating success rate of Comparative Example 3 was 40%.

[0051] The coating efficiency of the coated ostrich feathers was evaluated, that is, the time required to achieve an ideal coating effect was recorded. After evaluation, the coating efficiency of Comparative Example 3 was 5 minutes / sample.

[0052] The adhesion of the coated ostrich feathers was tested. A grid knife was used to draw a certain number of grid lines (usually 6×6, a total of 36 small squares) on the surface of the coating. The transparent tape was pressed hard to make it close to the drawn area, and then quickly torn off. The degree of coating shedding was observed and recorded. The evaluation criteria were: Level 5: No coating shedding. Level 4: Coating shedding was less than 5%. Level 3: Coating shedding was 5%-15%. Level 2: Coating shedding was 15%-35%. Level 1: Coating shedding was 35%-65%. Level 0: Coating shedding was greater than 65%. After evaluation, the coating shedding of Comparative Example 3 was Level 2.

[0053] The coated ostrich feathers were placed under a UV lamp for an anti-UV radiation test. The coated ostrich feathers were irradiated with a UV lamp with a wavelength of 254nm. After irradiation for more than 150 minutes, the color of the aluminum film on the surface of the ostrich feathers changed from silvery white or light gray to dark gray, black or mottled colors, and tiny pores appeared on the surface of the aluminum film. After irradiation for more than 243 minutes, the aluminum film on the surface of the ostrich feathers fell off or deformed. The transmittance before and after UV irradiation was tested using a UV intensity detector. The test showed that the transmittance of the coated ostrich feathers before UV irradiation was 60%, and the transmittance of the coated ostrich feathers after UV irradiation was 47%.

[0054] After coating, the dust removal efficiency of the coated ostrich feather moon dust brush was evaluated: the ostrich feather moon dust brush was used to conduct dust removal tests on cerium-doped glass. Before and after each dust removal test, the mass of simulated moon dust was weighed using an electronic balance to calculate the dust removal efficiency. Dust removal efficiency = (dust mass before test - dust mass after test) / dust mass before test × 100%. At least 5 dust removal tests were conducted to obtain the average value. After calculation, the dust removal efficiency was 98.9%.

[0055] Comparative Example 4 The ostrich feathers with a length of 25 mm, a density of 1.0-1.0 g / cm³, an elastic modulus of 3 GPa, and a hollow ratio of 80% were selected without coating treatment.

[0056] The ostrich feathers were placed under a UV lamp for an anti-UV radiation test. The coated ostrich feathers were irradiated with a UV lamp with a wavelength of 254nm. After irradiation for more than 108 minutes, the color of the aluminum film on the surface of the ostrich feathers changed from silvery white or light gray to dark gray, black or mottled colors, and tiny pores appeared on the surface of the aluminum film. After irradiation for more than 201 minutes, the aluminum film on the surface of the ostrich feathers fell off or deformed. The transmittance before and after UV irradiation was tested using a UV intensity detector. The test showed that the transmittance of the coated ostrich feathers before UV irradiation was 85%, and the transmittance of the coated ostrich feathers after UV irradiation was 75%.

[0057] Evaluation of dust removal efficiency of uncoated ostrich feather lunar dust brush: Before and after each dust removal test, the mass of simulated lunar dust was weighed using an electronic balance to calculate the dust removal efficiency. Dust removal efficiency = (dust mass before test - dust mass after test) / dust mass before test × 100%. At least 5 dust removal tests were performed to obtain the average value, and the dust removal efficiency was calculated to be 98.4.

[0058] Table 1 Results of different pretreatments of Example 1 and Comparative Examples 1-3 project Treatment Coating success rate (%) Coating efficiency (minutes / sample) Adhesion (grade) Example 1 Plasma cleaning 90 3 5 Comparative Example 1 No treatment 30 5 2 Comparative Example 2 Sandpaper polishing 50 4.5 3 Comparative Example 3 Water flushing 40 4.5 2 As shown in Table 1, the ostrich hair was pretreated by plasma cleaning and then coated. The coating success rate was 90%, the coating efficiency was 3 minutes / sample, and the adhesion was 5 levels, which were much higher than the success rate and efficiency of coating the ostrich hair without treatment. The adhesion was also the strongest. The ostrich hair was pretreated by water flushing. The coating success rate was 40%, the coating efficiency was 4.5 minutes / sample, and the adhesion was 2 levels. The coating success rate of the ostrich hair pretreated by water flushing was higher than that of the non-treatment method. The coating efficiency and adhesion were not significantly different from those of the non-treatment method. Water flushing mainly relied on the impact force and dissolution of the water flow to clean. In addition to dust, grease, protein and other organic pollutants on the surface, the loose substances and some soluble pollutants on the surface are taken away by the flow of water, thereby exposing a more uniform and stable substrate surface, which is conducive to the deposition of sputtered particles; the ostrich feathers are pretreated by sandpaper polishing, and the coating success rate is 50%, the coating efficiency is 4.5 minutes / sample, and the adhesion is level 3. The coating success rate, coating efficiency and adhesion of the ostrich feathers pretreated by sandpaper polishing are higher than those of water flushing. This is because sandpaper polishing can remove pollutants, oxide layers, old coatings or other surface impurities on the substrate surface, and can remove more stubborn pollutants, including some impurities embedded in the substrate surface. In addition, sandpaper polishing increases the roughness of the substrate surface, which can provide more anchor points, making it easier for sputtered particles to deposit and fix on the substrate.

[0059] Table 2 UV irradiation results of Example 1 and Comparative Examples 1-4 project Transmittance before UV irradiation (%) Transmittance after UV irradiation (%) Time for the aluminum film to change color under ultraviolet irradiation (min) Time for aluminum film to fall off under ultraviolet irradiation (min) Example 1 60 40 200 300 Comparative Example 1 65 53 162 258 Comparative Example 2 60 45 138 220 Comparative Example 3 60 47 150 243 Comparative Example 4 85 75 108 201 It can be seen from Table 2 that the ostrich feather brush that is first plasma cleaned and then coated has significantly improved anti-ultraviolet radiation ability, and its ultraviolet transmittance is reduced by 20%. After the ultraviolet irradiation of the aluminum film for 200 minutes, the color of the aluminum film changes from silver white or light gray to dark gray, black or mottled color. After the ultraviolet irradiation of the aluminum film for 300 minutes, the aluminum film begins to fall off or deform, which is much better than Comparative Example 1 (untreated direct coating), Comparative Example 2 (coating after sandpaper polishing) and Comparative Example 3 (coating after water flow cleaning). The ultraviolet transmittance of the untreated direct coating is reduced by 12%, the ultraviolet transmittance of the coating after sandpaper polishing is reduced by 15%, and the ultraviolet transmittance of the coating after water flow cleaning is reduced by 13%. This shows that plasma cleaning, as an effective surface treatment technology, effectively removes pollutants and organic matter by impacting the surface of ostrich feathers with high-energy particles, achieves surface activation and improves roughness, and enhances the adhesion between the coating material and the substrate, thereby improving the uniformity and density of the coating layer. The pores in the coating layer are reduced, which effectively blocks the penetration of ultraviolet rays, significantly improves the ultraviolet blocking effect of the aluminum film, and enhances the stability of the ostrich feather moon dust brush in a vacuum environment.

[0060] Table 3 Comparison of dust removal efficiency and durability between Example 1 and Comparative Examples 1-4 project Number of experiments Durability time (minutes) Dust removal efficiency Example 1 5 117 99.5% Comparative Example 1 5 83 98.6% Comparative Example 2 5 108 99.1% Comparative Example 3 5 91 98.9% Comparative Example 4 5 75 98.4% As shown in Table 3, the dust removal efficiency of ostrich feathers that were first plasma cleaned and then coated was the best and the durability was the longest. Plasma cleaning technology can penetrate into the microstructure of ostrich feathers and effectively remove surface pollutants and organic residues, so that the ostrich feather brush after coating has an extremely high dust removal rate of 99.5%; the dust removal efficiency of ostrich feathers that were coated after sandpaper polishing was second, because the use of 600-mesh sandpaper polishing can remove pollutants, oxide layers, old coatings or other surface impurities on the surface of ostrich feathers. Although sandpaper polishing can also significantly improve the surface cleanliness and roughness, thereby enhancing the bonding force of the coating, its deep cleaning and surface modification effects are slightly inferior to plasma cleaning. The dust removal rate of the ostrich feather brush after coating is 99.1%; water flushing mainly relies on the impact force and dissolution of the water flow to clean the surface, and cannot deeply clean and modify the surface like plasma and sandpaper polishing, resulting in a dust removal rate of 98.9% after coating. Direct coating without any pretreatment resulted in a weaker bond between the coating and the substrate, and the dust removal rate dropped to 98.6%. The uncoated ostrich brush had the lowest dust removal rate of 98.4% due to the lack of any surface treatment or coating to enhance cleaning efficiency. Therefore, the surface pretreatment method has a significant impact on improving the dust removal efficiency of the ostrich brush.

[0061] It can be seen that in a vacuum environment, strong ultraviolet radiation may damage the structure of ostrich feathers, causing them to become brittle or lose elasticity, and reduce dust removal efficiency. By choosing ostrich feathers as the bristles of the lunar dust brush, the ostrich feathers are first plasma cleaned, and then a layer of aluminum film is evenly deposited on the surface of the ostrich feathers using magnetron sputtering technology. This aluminum film can effectively reflect ultraviolet rays and reduce radiation damage to the lunar dust brush; improve wear resistance, the aluminum film can help the ostrich feather lunar dust brush maintain its structural integrity and functionality for a longer period of time during use, reduce replacement frequency, and reduce maintenance costs; it can also enhance the mechanical strength and stiffness of the ostrich feather brush, making it more durable during the cleaning process. The application of this innovative technology provides a more efficient and reliable lunar dust removal solution for future manned lunar missions.

[0062] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for preparing an anti-ultraviolet radiation ostrich feather moon dust brush, characterized in that: include: After cleaning and drying the ostrich feathers with plasma under the action of protective gas, a vacuum magnetron sputtering method is used to sputter a target aluminum onto the surface of the cleaned ostrich feathers to form an aluminum film, wherein the thickness of the aluminum film is 500-800nm, and the transmittance of the aluminum film under ultraviolet irradiation is ≤40%.

2. The method for preparing the ostrich feather dust brush according to claim 1, characterized in that: The protective gas is argon gas, the jet velocity of the argon gas is 0.7-0.8 m / s, and the gas flow rate of the argon gas is 40-100 sccm; The cleaning power is 200-500 W, the cleaning time is 2-5 minutes, and the cleaning vacuum is < 50 mTorr; The drying time is 2-4 minutes, and the drying temperature is 50-70°C.

3. The method for preparing the ostrich feather dust brush according to claim 1, characterized in that: The length of the ostrich feather is 20-30 mm, the density of the ostrich feather is 0.8-1.0 g / cm³, the elastic modulus of the ostrich feather is 2.0-4.5 GPa, the hollow rate of the ostrich feather is 70%-80%, and the diameter of the central hole of the ostrich feather is 0.1 mm-0.5 mm.

4. The method for preparing the ostrich feather dust brush according to claim 1, characterized in that: The sputtering gas is argon, the sputtering power of the target aluminum is 2-5 kWh, the sputtering pressure of the target aluminum is 4-6 Pa, the sputtering flow rate of the target aluminum is 70-90 CC / min, the sputtering pressure of the target aluminum is 4-6 Pa, and the deposition rate of the target aluminum is 5-20 nm / min.

5. An anti-ultraviolet radiation ostrich feather moon dust brush, characterized in that: The moon dust brush is prepared by any one of the preparation methods of claims 1-4.

6. The moon dust brush according to claim 5, characterized in that: The moon dust brush comprises: Ostrich feathers; Base; A first connecting rod, one end of which is detachably connected to the base; An electrostatic switch, wherein the electrostatic switch is arranged on the first connecting rod; A brush head copper wire, one end of which passes through the base and is connected to the feather shaft of the ostrich feather. An electrostatic generator, wherein the electrostatic generator is disposed in the first connecting rod, one end of the electrostatic generator is electrically connected to the brush head copper wire; and the other end of the electrostatic generator is electrically connected to the electrostatic switch.

7. The moon dust brush according to claim 6, characterized in that: The moon dust brush also includes: a second connecting rod; a vacuum motor, the vacuum motor being mounted at one end of the second connecting rod; A coupling, wherein the driven shaft of the coupling is fixedly connected to the first connecting rod; and the driving shaft of the coupling is fixedly connected to the vacuum motor.

8. The moon dust brush according to claim 7, characterized in that: The moon dust brush also includes: power supply; A handle, wherein the power supply is arranged in the handle, and the other end of the second connecting rod is connected to the handle; the power supply is electrically connected to the vacuum motor; Charging pad; A wire, one end of which is electrically connected to the charging plate; A plug, the other end of the wire being electrically connected to the plug; A switch is disposed on the handle and is electrically connected to the power source.

9. The moon dust brush according to claim 8, characterized in that: The base is made of copper.

10. The moon dust brush according to claim 9, characterized in that: The copper wires of the brush head are arranged in a cross shape.

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