Automobile solar rain eyebrow and preparation method thereof

Abstract

The invention discloses an automobile solar rain eyebrow and a preparation method thereof, and relates to the technical field of automobile photovoltaic accessories. The automobile solar rain eyebrow comprises a photovoltaic panel and a light-emitting assembly, and a frame material of the photovoltaic panel comprises, by weight, 10-15 parts of modified carbon fibers, 30-40 parts of ethylene-trifluorochlor oethylene copolymer fibers, 60-70 parts of polypropylene resin, 2-4 parts of an antistatic agent, 1-2 parts of a light stabilizer, 1-3 parts of a compatilizer and 2-4 parts of an antioxidant. The automobile solar rain eyebrow is diversified in function, and the frame is firm and can adapt to the outdoor environment.

Description

Technical Field

[0001] The invention relates to the field of photovoltaic accessories for automobiles, and in particular to an automobile solar rain eyebrow and a preparation method thereof. Background Art

[0002] The rearview mirror eyebrows are indispensable parts of automobiles. In addition to simply blocking rain, today's high-end automobile rearview mirror eyebrows can also have functions such as heating in rainy and snowy weather, rear image detection, and blind spot scanning. However, the vehicle needs to provide a stable power supply for different functions, and the power supply design for different functions is relatively complicated.

[0003] The overall structure of a solar photovoltaic module includes a frame, solar photovoltaic glass, silicon wafer, hot melt adhesive layer, junction box and insulating backplane. The frame is the solar photovoltaic cell packaging frame. In the existing technology, aluminum alloy materials are mostly used as the frame. The frame made of aluminum alloy has the advantages of strong oxidation resistance, high strength, good tensile strength, high fatigue resistance and long service life. However, it also consumes non-ferrous metal resources, has complex manufacturing processes, complex equipment and is expensive. Moreover, after being applied to rearview mirrors, the aluminum alloy frame is heavy and the surface is easily oxidized by wind and sun.

[0004] Therefore, if solar photovoltaic modules are to be applied to automobile rearview mirrors, there is currently a lack of a low-cost, high-performance framework. Summary of the invention

[0005] The present invention is made in view of the above-mentioned problems and provides a car solar rain eyebrow and a preparation method thereof.

[0006] The first aspect of the present invention provides a car solar rain eyebrow, which includes a photovoltaic panel and a light-emitting component. The frame material of the photovoltaic panel includes, by weight, 10 to 15 parts of modified carbon fiber, 30 to 40 parts of ethylene-trifluorochloroethylene copolymer fiber, 60 to 70 parts of polypropylene resin, 2 to 4 parts of antistatic agent, 1 to 2 parts of light stabilizer, 1 to 3 parts of compatibilizer, and 2 to 4 parts of antioxidant.

[0007] In some embodiments of the present invention, the modified carbon fiber is chopped carbon fiber modified with graphene oxide, and the fiber retention length of the chopped carbon fiber is greater than 800 μm.

[0008] In some embodiments of the present invention, the melt flow rate of the polypropylene resin is 2.5 g / 10 min to 4.0 g / 10 min.

[0009] In some embodiments of the present invention, the antistatic agent includes a stearic acid monoglyceride antistatic agent.

[0010] In some embodiments of the present invention, the light stabilizer includes light stabilizer 5229, UV-3853PP5, UV-3808PP5, T-81, T-70; and / or, the compatibilizer includes CMG9801 or CMG5001-T; and / or, the antioxidant includes at least one of antioxidant 1010, antioxidant 1076, and antioxidant 2246.

[0011] In some embodiments of the present invention, the photovoltaic panel is used to power a light-emitting component, the power of the light-emitting component is 5 watts to 15 watts, and the power of the photovoltaic panel is 50 watts to 70 watts.

[0012] A second aspect of the present invention provides a method for preparing a solar rain eyebrow for an automobile, comprising the following steps:

[0013] a: preparing a carbon fiber mixed solution, preparing a graphene oxide mixed solution, adding the graphene oxide mixed solution dropwise into the carbon fiber mixed solution, stirring, filtering, washing, and drying to obtain modified carbon fiber;

[0014] b: mixing the modified carbon fiber, ethylene-chlorotrifluoroethylene copolymer fiber, polypropylene resin, antistatic agent, light stabilizer, compatibilizer and antioxidant by a mixer to obtain a mixture;

[0015] c: extruding the mixture into a mold of a rain eyebrow through a screw extruder, and pulling it into a water tank for cooling by a tractor to obtain a parison;

[0016] d: Cut the obtained parison into pieces to obtain the frame of the photovoltaic panel, install the components of the photovoltaic panel except the frame and the light-emitting components, form electrical connections, and obtain an integrated automotive solar rain eyebrow.

[0017] In some embodiments of the present invention, in step a, carbon fiber and potassium permanganate ethanol solution are mixed to prepare a carbon fiber mixed solution, and graphene oxide and anhydrous ethanol are mixed to prepare a graphene oxide mixed solution.

[0018] In some embodiments of the present invention, in step b, the temperature of the mixture is 125° C. to 140° C., the speed of the mixture is 40 r / min to 70 r / min, and the time of the mixture is 20 min to 30 min.

[0019] In some embodiments of the present invention, the extrusion temperatures of the screw extruder are: 150°C to 160°C in the conveying section, 165°C to 170°C in the melting section, 190°C to 195°C in the mixing section, 200°C to 205°C in the exhaust section and 220°C to 230°C in the homogenizing section.

[0020] The beneficial effects that can be achieved by the present invention are:

[0021] The present invention provides a kind of automobile solar rain eyebrow, the frame material of which combines the high strength and light weight characteristics of modified carbon fiber, the chemical corrosion resistance of ethylene-chlorotrifluoroethylene copolymer fiber, and the processing convenience and cost-effectiveness of polypropylene resin. Through the joint action of the reinforcing effect of carbon fiber and the plasticity of resin, higher tensile strength and impact resistance are achieved, and the addition of light stabilizer and antioxidant improves the stability of the material under long-term sunshine and reduces the aging caused by ultraviolet rays. Through this combination, the rain eyebrow is not only improved in physical properties, but also significantly enhanced in environmental adaptability. In addition, the bonding between the fiber and the resin matrix is ​​enhanced by improving the surface treatment of the fiber, thereby improving the overall performance of the composite material. This comprehensive optimization not only improves the durability and reliability of the solar rain eyebrow, but also provides more possibilities for its application in the automotive field. DETAILED DESCRIPTION

[0022] The following description is provided for those skilled in the art to fully understand the present invention, and is not intended to limit the subject matter described in the claims.

[0023] The "range" disclosed in the present invention is defined in the form of a lower limit and an upper limit, and a given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of the particular range. The range defined in this way can be inclusive or exclusive of the end values, and can be arbitrarily combined, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 60 to 120 and 80 to 110 is listed for a particular parameter, it is understood that a range of 60 to 110 and 80 to 120 is also expected. In addition, if the minimum range values ​​1 and 2 are listed, and if the maximum range values ​​3, 4 and 5 are listed, the following ranges can all be expected: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4 and 2 to 5. In the present invention, unless otherwise specified, the numerical range "a to b" represents an abbreviation of any real number combination between a and b, wherein a and b are both real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" are listed in this document, and "0-5" is just an abbreviation of these numerical combinations. In addition, when a parameter is expressed as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0024] If not otherwise specified, all embodiments and optional embodiments of the present invention can be combined with each other to form a new technical solution.

[0025] Unless otherwise specified, all technical features and optional technical features of the present invention can be combined with each other to form a new technical solution.

[0026] If not otherwise specified, all steps of the present invention may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, the method may further include step (c), which means that step (c) may be added to the method in any order, for example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0027] In view of this, the present invention proposes a car solar rain eyebrow, which includes a photovoltaic panel and a light-emitting component. The frame material of the photovoltaic panel includes, by weight: 10 to 15 parts of modified carbon fiber, 30 to 40 parts of ethylene-trifluorochloroethylene copolymer fiber, 60 to 70 parts of polypropylene resin, 2 to 4 parts of antistatic agent, 1 to 2 parts of light stabilizer, 1 to 3 parts of compatibilizer, and 2 to 4 parts of antioxidant.

[0028] The frame material of the automotive solar rain eyebrow combines the high strength and light weight of modified carbon fiber, the chemical corrosion resistance of ethylene-trifluorochloroethylene copolymer fiber, and the processing convenience and cost-effectiveness of polypropylene resin. Through the combined effect of the reinforcement of carbon fiber and the plasticity of resin, higher tensile strength and impact resistance are achieved. The addition of light stabilizers and antioxidants improves the stability of the material under long-term sunlight and reduces aging caused by ultraviolet rays.

[0029] Through this combination, the rain brow has not only been improved in physical properties, but also significantly enhanced in environmental adaptability. In addition, the fiber surface treatment is improved to enhance its bonding with the resin matrix, thereby improving the overall performance of the composite material and reducing weight while adding components. This comprehensive optimization not only improves the durability and reliability of the solar rain brow, but also provides more possibilities for its application in the automotive field.

[0030] In some embodiments, the car solar rain eyebrow also includes an energy storage device, which can provide power even without sunlight, and can achieve more functions through an intelligent control system. For example, it can be combined with the vehicle navigation system to automatically adjust the brightness and color of the light-emitting components according to the weather forecast and road conditions to provide better lighting effects and warning functions. In addition, the solar car rain eyebrow can also be linked with other systems of the vehicle to achieve more intelligent functions. For example, it can be combined with the reversing radar system. When an obstacle or an oncoming vehicle is detected at the rear, the light-emitting component will automatically light up to remind the driver to pay attention to the situation behind; or it can be linked with the automatic driving system to automatically adjust the brightness and direction of the light-emitting component according to the vehicle's driving status and the surrounding environment to provide better assisted driving functions.

[0031] In some embodiments, the modified carbon fiber is chopped carbon fiber modified with graphene oxide, and the fiber retention length of the chopped carbon fiber is greater than 800 μm.

[0032] In this scheme, the surface roughness and the number of chemical functional groups of graphene oxide modified carbon fiber will increase, which helps to improve the bonding strength between the carbon fiber and the resin matrix, and can significantly improve the interfacial adhesion with the thermoplastic resin, thereby improving the mechanical properties of the composite material. The high thermal conductivity of graphene helps to improve the thermal management capability of the composite material and has high thermal stability. In addition, the addition of graphene can also improve the electrical conductivity of carbon fiber composites and expand the application of electromagnetic shielding or electrothermal performance.

[0033] Generally, the longer the length of the short carbon fiber, the better its performance in the matrix. However, the modification method and blending system of this scheme prove that the fiber retention length of the short carbon fiber is greater than 800 μm, which can achieve a good effect. After it is greater than 2 mm, the effect growth slows down and the cost performance decreases. Preferably, the fiber retention length of the short carbon fiber is 1 to 1.5 mm.

[0034] In some embodiments, the melt flow rate of the polypropylene resin is 2.5 g / 10 min to 4.0 g / 10 min.

[0035] In this solution, polypropylene resin within this MFR range generally has better processing performance, helps to reduce deformation of products, improves dimensional stability and appearance quality of products, can more effectively fill molds, reduce material waste and is suitable for a variety of processing techniques.

[0036] In some embodiments, the antistatic agent comprises a stearic acid monoglyceride antistatic agent. In some embodiments, the stearic acid monoglyceride antistatic agent comprises ADA-10M or ASA-10.

[0037] In some embodiments, the light stabilizer includes light stabilizer 5229, UV-3853PP5, UV-3808PP5, T-81, The compatibilizer includes CMG9801 or CMG5001-T; the antioxidant includes at least one of antioxidant 1010, antioxidant 1076, and antioxidant 2246.

[0038] Light stabilizer 5229 is a hindered amine light stabilizer with excellent compatibility with polyolefin resins, and has the characteristics of migration resistance, low precipitation, low color pollution, and excellent surface stability.

[0039] UV-3853PP5 is a 50% hindered amine light stabilizer 2,2,6,6-tetramethyl-4-piperidinol stearate oligopropylene mixture, which has the dual functions of UV absorption and free radical capture. It is suitable for polyolefin systems and can effectively prevent light-oxidation aging of products during use.

[0040] UV-3808PP5 is a compound light-stabilized masterbatch that can be used with the above two light stabilizers.

[0041] T-81 and T-70 significantly improves the compatibility of light stabilizers with resins, allowing the light stabilizers to form higher concentrations on the surface of the product exposed to light without precipitation, thereby significantly improving the effectiveness of the light stabilizers.

[0042] Compatibilizers CMG9801 and CMG5001-T can impart polarity and adhesion to polypropylene through the action of maleic anhydride groups, improve the interfacial bonding between polypropylene and fillers, fibers, etc., and thus enhance the mechanical properties and weather resistance of the material. CMG5001-T is preferably used, as adding a small amount can significantly enhance the adhesion between polyolefins and inorganic fillers, thereby significantly improving the key properties of the material, such as tensile strength, flexural strength, impact strength, and heat deformation temperature.

[0043] The chemical name of antioxidant 1010 (IRGANOX 1010) is pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], which has good compatibility, high anti-extraction and low volatility.

[0044] The chemical name of antioxidant 1076 is β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate octadecyl alcohol ester, which has good heat resistance and water extraction resistance.

[0045] In some embodiments, the photovoltaic panel is used to power the light emitting assembly, the power of the light emitting assembly is 5 watts to 15 watts, and the power of the photovoltaic panel is 50 watts to 70 watts. In some embodiments, the adjustment is made according to the average sunshine hours and intensity in the area.

[0046] A second aspect of the present invention provides a method for preparing a solar rain eyebrow for an automobile, comprising the following steps:

[0047] a: preparing a carbon fiber mixed solution, preparing a graphene oxide mixed solution, adding the graphene oxide mixed solution dropwise into the carbon fiber mixed solution, stirring, filtering, washing, and drying to obtain modified carbon fiber;

[0048] b: mixing the modified carbon fiber, ethylene-chlorotrifluoroethylene copolymer fiber, polypropylene resin, antistatic agent, light stabilizer, compatibilizer and antioxidant by a mixer to obtain a mixture;

[0049] c: extruding the mixture into a mold of a rain eyebrow through a screw extruder, and pulling it into a water tank for cooling by a tractor to obtain a parison;

[0050] d: Cut the obtained parison into pieces to obtain the frame of the photovoltaic panel, install the components of the photovoltaic panel except the frame and the light-emitting components, form electrical connections, and obtain an integrated automotive solar rain eyebrow.

[0051] It should be noted that the framework materials in the preparation method include, by weight, 10 to 15 parts of modified carbon fiber, 30 to 40 parts of ethylene-chlorotrifluoroethylene copolymer fiber, 60 to 70 parts of polypropylene resin, 2 to 4 parts of antistatic agent, 1 to 2 parts of light stabilizer, 1 to 3 parts of compatibilizer, and 2 to 4 parts of antioxidant.

[0052] In some embodiments, in step a, carbon fiber and potassium permanganate ethanol solution are mixed to prepare a carbon fiber mixed solution, and graphene oxide and anhydrous ethanol are mixed to prepare a graphene oxide mixed solution.

[0053] In some embodiments, the preparation of modified carbon fiber includes: pretreating carbon fiber, ultrasonically treating with 60°C deionized water for 2 hours, or soaking in a concentrated nitric acid solution at 60°C for 2 hours to increase the oxygen-containing functional groups on the surface of the carbon fiber; adding 15 parts of surface-treated carbon fiber and 10 parts of 15% mass concentration potassium permanganate solution to 25 parts of anhydrous ethanol, stirring for 2 hours to obtain a carbon fiber mixed solution; adding 5 parts of graphene oxide to 20 parts of anhydrous ethanol, stirring at 300r / min~500r / min for 2 hours to obtain a graphene oxide mixed solution; adding the graphene oxide mixed solution dropwise to the carbon fiber mixed solution, stirring at 500r / min~800r / min for 2h~4h, filtering, washing and drying the product to obtain modified carbon fiber.

[0054] In some embodiments, in step b, the mixing temperature is 125° C. to 140° C., the mixing speed is 40 r / min to 70 r / min, and the mixing time is 20 min to 30 min.

[0055] This temperature range ensures that the plastic material can be fully melted and mixed while avoiding material decomposition or performance degradation due to excessive temperatures.

[0056] The mixing speed range can ensure that the materials have good circulation flow during the mixing process, but will not cause uneven dispersion of the materials or generate excessive friction heat due to excessive speed.

[0057] The mixing time frame allows sufficient mixing cycles to ensure adequate dispersion and uniform distribution between the additive and the base resin while avoiding over-mixing that would degrade the material properties.

[0058] In some embodiments, the extrusion temperatures of the screw extruder are: 150°C to 160°C in the conveying section, 165°C to 170°C in the melting section, 190°C to 195°C in the mixing section, 200°C to 205°C in the exhaust section, and 220°C to 230°C in the homogenizing section.

[0059] The temperature range of the conveying section is mainly used for the initial preheating and conveying of plastics, ensuring that the plastic particles have a certain amount of thermal energy before entering the melting section, reducing the heat load on the melting section. The plastic particles in the melting section begin to melt, and this temperature is set slightly higher than the conveying section to provide enough energy to completely melt the plastic, while avoiding excessively high temperatures that cause material decomposition. The temperature range of the mixing section helps to improve mixing efficiency. The main purpose of the exhaust section is to remove moisture and volatile substances from the plastic melt. Higher temperatures help remove volatiles while maintaining a stable flow of the melt. The homogenization section ensures that the melt reaches optimal fluidity and uniformity before extrusion. This temperature range helps to improve the appearance quality and physical properties of the extrudate.

[0060] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the following specific embodiments are only used to explain the present invention, and are not used to limit the present invention.

[0061] Example 1

[0062] 1. Preparation of modified carbon fiber

[0063] Pretreating carbon fiber, using 60°C deionized water for ultrasonic treatment for 2 hours, or soaking in 60°C concentrated nitric acid solution for 2 hours to increase the oxygen-containing functional groups on the surface of the carbon fiber; adding 15 parts of surface-treated carbon fiber and 10 parts of 15% mass concentration potassium permanganate solution to 25 parts of anhydrous ethanol, stirring for 2 hours to obtain a carbon fiber mixed solution; adding 5 parts of graphene oxide to 20 parts of anhydrous ethanol, stirring at 400r / min for 2 hours to obtain a graphene oxide mixed solution; adding the graphene oxide mixed solution dropwise to the carbon fiber mixed solution, stirring at 600r / min for 2 hours to 4 hours, the carbon fiber has a fiber retention length of about 1.5mm, filtering, washing and drying the product to obtain a modified carbon fiber;

[0064] 2. Prepare the framework

[0065] In parts by weight, 12 parts of modified carbon fiber, 30 parts of ethylene-chlorotrifluoroethylene copolymer fiber, 65 parts of polypropylene resin, 1 part of ADA-10M, 2 parts of T-70, 2 parts of CMG5001-T and 3 parts of antioxidant 1010 are mixed in a mixer at 130°C and 55r / min for 30min to obtain a mixture, wherein the melt flow rate of the polypropylene resin is about 3g / 10min; the mixture is extruded into a mold of a rain eyebrow through a screw extruder, and the extrusion temperatures are: 160°C for the conveying section, 170°C for the melting section, 190°C for the mixing section, 200°C for the exhaust section and 230°C for the homogenizing section, and the mixture is pulled into a water tank by a tractor for cooling to obtain a preform, and the obtained preform is cut to obtain a frame of a photovoltaic panel;

[0066] 3. Assemble the rain eyebrow

[0067] Install solar photovoltaic glass, silicon wafer, hot melt adhesive layer, junction box, insulating backplane and LED module. The size of LED module is 800mm x 200mm x 2.5mm. Use MC4 connector to make electrical connection. The power of LED lamp is 15 watts and the power of photovoltaic panel is 60 watts to get an integrated automotive solar rain eyebrow.

[0068] Example 2

[0069] In parts by weight, the frame material includes 10 parts of modified carbon fiber, 35 parts of ethylene-chlorotrifluoroethylene copolymer fiber, 65 parts of polypropylene resin, 1 part of ADA-10M, T-702 parts, CMG5001-T2 parts and antioxidant 10103 parts, and refer to Example 1 for the rest.

[0070] Example 3

[0071] In parts by weight, the frame material includes 12 parts of modified carbon fiber, 35 parts of ethylene-chlorotrifluoroethylene copolymer fiber, 65 parts of polypropylene resin, 1 part of ADA-10M, T-702 parts, CMG5001-T2 parts and antioxidant 10103 parts, and refer to Example 1 for the rest.

[0072] Example 4

[0073] In parts by weight, the frame material includes 15 parts of modified carbon fiber, 30 parts of ethylene-chlorotrifluoroethylene copolymer fiber, 65 parts of polypropylene resin, 1 part of ADA-10M, T-702 parts, CMG5001-T2 parts and antioxidant 10103 parts, and refer to Example 1 for the rest.

[0074] Example 5

[0075] In parts by weight, the frame material includes 15 parts of modified carbon fiber, 30 parts of ethylene-chlorotrifluoroethylene copolymer fiber, 70 parts of polypropylene resin, 1 part of ADA-10M, T-702 parts, CMG5001-T2 parts and antioxidant 10103 parts, and refer to Example 1 for the rest.

[0076] Comparative Example 1

[0077] In Comparative Example 1, no modified carbon fiber was added, and unmodified chopped carbon fiber was added. The rest was referred to Example 1.

[0078] Comparative Example 2

[0079] The solar rain eyebrow frame of Comparative Example 2 is cast from a commercially available aluminum alloy frame, and the rest is as in Example 1.

[0080] Performance Testing:

[0081] The automotive solar rain eyebrow frames obtained in the embodiments and comparative examples were tested for performance and the results were recorded:

[0082] Table 1: Test results of Examples 1 to 5 and Comparative Examples 1 to 2

[0083]

[0084]

[0085] It can be seen from Table 1 that the automotive solar rain eyebrows of Examples 1 to 5 all show better performance in terms of weight, softening temperature resistance, elongation at break, tensile strength, bending modulus and resistance to ultraviolet aging. They are light in weight and can remain stable at high temperatures. The elongation at break and tensile strength are both within a reasonable range. The bending modulus is high, indicating good flexibility and strength, and there is no obvious aging phenomenon under ultraviolet irradiation. In contrast, Comparative Examples 1 and 2 have deficiencies in certain properties, such as cracking in Comparative Example 1, and Comparative Example 2 is heavier and the surface is obviously discolored under ultraviolet irradiation. This shows that the rain eyebrows of this scheme have obvious advantages in weather resistance and stability, and are suitable for long-term use in outdoor environments. The automotive solar rain eyebrows of this scheme can also be used as a stable support for photovoltaics in high temperature outdoor weather, expanding the application ideas of automotive rain eyebrows.

[0086] It should be noted that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present invention are all included in the technical scope of the present invention. In addition, without departing from the scope of the main purpose of the present invention, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present invention.

Claims

1. A car solar rain eyebrow, characterized in that: The automobile solar rain eyebrow comprises a photovoltaic panel and a light-emitting component. The frame material of the photovoltaic panel comprises, by weight: 10-15 parts of modified carbon fiber, 30-40 parts of ethylene-chlorotrifluoroethylene copolymer fiber, 60-70 parts of polypropylene resin, 2-4 parts of antistatic agent, 1-2 parts of light stabilizer, 1 to 3 parts of compatibilizer, 2 to 4 parts of antioxidant.

2. The automobile solar rain eyebrow according to claim 1, characterized in that: The modified carbon fiber is chopped carbon fiber modified with graphene oxide, and the fiber retention length of the chopped carbon fiber is greater than 800 μm.

3. The automobile solar rain eyebrow according to claim 1, characterized in that: The melt flow rate of the polypropylene resin is 2.5 g / 10 min to 4.0 g / 10 min.

4. The automobile solar rain eyebrow according to claim 1, characterized in that: The antistatic agent includes stearic acid monoglyceride antistatic agent.

5. The automobile solar rain eyebrow according to claim 1, characterized in that: The light stabilizers include light stabilizer 5229, UV-3853PP5, UV-3808PP5, At least one of; And / or, the compatibilizer includes CMG9801 or CMG5001-T; And / or, the antioxidant includes at least one of antioxidant 1010, antioxidant 1076, and antioxidant 2246.

6. The automobile solar rain eyebrow according to claim 1, characterized in that: The photovoltaic panel is used to supply power to the light-emitting component. The power of the light-emitting component is 5 watts to 15 watts, and the power of the photovoltaic panel is 50 watts to 70 watts.

7. A method for preparing a solar rain eyebrow for a car according to any one of claims 1 to 6, characterized in that: The following steps are involved: a: preparing a carbon fiber mixed solution, preparing a graphene oxide mixed solution, adding the graphene oxide mixed solution dropwise into the carbon fiber mixed solution, stirring, filtering, washing, and drying to obtain modified carbon fiber; b: mixing the modified carbon fiber, ethylene-chlorotrifluoroethylene copolymer fiber, polypropylene resin, antistatic agent, light stabilizer, compatibilizer and antioxidant by a mixer to obtain a mixture; c: extruding the mixture into a mold of a rain eyebrow through a screw extruder, and pulling it into a water tank for cooling by a tractor to obtain a parison; d: Cut the obtained parison into pieces to obtain the frame of the photovoltaic panel, install the components of the photovoltaic panel except the frame and the light-emitting components, form electrical connections, and obtain an integrated automotive solar rain eyebrow.

8. The method for preparing the automobile solar rain eyebrow according to claim 7, characterized in that: In step a, carbon fiber and potassium permanganate ethanol solution are mixed to prepare a carbon fiber mixed solution, and graphene oxide and anhydrous ethanol are mixed to prepare a graphene oxide mixed solution.

9. The method for preparing the automobile solar rain eyebrow according to claim 7, characterized in that: In step b, the temperature of the mixture is 125° C. to 140° C., the speed of the mixture is 40 r / min to 70 r / min, and the time of the mixture is 20 min to 30 min.

10. The method for preparing the automobile solar rain eyebrow according to claim 7, characterized in that: The extrusion temperatures of the screw extruder are: 150°C to 160°C in the conveying section, 165°C to 170°C in the melting section, 190°C to 195°C in the mixing section, 200°C to 205°C in the exhaust section and 220°C to 230°C in the homogenizing section.

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