High-strength carbon fiber material with meteorite-like texture and preparation method thereof

Abstract

The invention discloses a high-strength carbon fiber material with meteorite-like texture and a preparation method thereof.The preparation method includes the steps that S1, a carbon fiber sheet and a texture mold are obtained, and a concave-convex structure with meteorite texture is formed on the surface of the texture mold; s2, a plurality of carbon fiber sheets are circularly laid in a texture mold according to a plurality of preset angles, and each layer of carbon fiber sheets are bonded through resin; carrying out curing treatment until the multi-layer carbon fiber sheet is uniformly combined with the resin, and demolding to obtain a primary finished product with meteorite-like textures on the surface; s3, performing roughness treatment on the surface of the primary finished product to obtain a fiber material; by means of the steps, the meteorite-like textures and the meteorite-like surface roughness are formed on the surface of the carbon fiber material, no chemical auxiliaries are introduced to process the carbon fiber sheet, the original strength of the carbon fiber material cannot be affected, the carbon fiber material has rich and novel meteorite-like textures, and the defect that the appearance of the carbon fiber material is single is overcome.

Description

Technical Field

[0001] The present invention relates to the field of polymer material preparation, and in particular to a carbon fiber material with a meteorite-like texture and a preparation method thereof. Background Art

[0002] Carbon fiber composite materials are widely used in aerospace, automobile manufacturing, sporting goods, electronic products and high-end consumer goods due to their excellent properties such as high strength, low density and corrosion resistance. However, with the growing demand for carbon fiber materials in all walks of life, carbon fiber materials have the following application disadvantages:

[0003] 1. The appearance is relatively simple. Since traditional carbon fiber materials mostly use woven or stretched fiber structures, their surface texture is relatively monotonous, which is difficult to meet the market demand for high-end consumer products that pursue unique appearance design and visual impact;

[0004] 2. Poor texture: In some decorative and high-end applications, although existing carbon fiber materials have strength, they lack surface structures with high-end visual effects and special textures, which limits their wide application in high-end design fields;

[0005] 3. Complexity of preparation methods: The traditional manufacturing process of carbon fiber composite materials is complex. Especially when it is required to maintain high strength of the material and give it a unique surface texture, the existing process is difficult to achieve under the premise of efficient production and cost reduction;

[0006] It can be seen that the existing carbon fiber materials are difficult to have both high strength and unique and rich visual appearance texture. Therefore, a more reasonable high-strength carbon fiber material is urgently needed to meet the above-mentioned technical drawbacks. Summary of the invention

[0007] The present invention provides a solution to the technical problem that carbon fiber materials in the prior art cannot be compatible with high strength and unique and rich visual appearance texture.

[0008] To achieve the above objectives, the present invention provides a high-strength carbon fiber material with a meteorite-like texture. The fiber material is composited by multiple layers of carbon fiber sheets through resin bonding, and the surface of the fiber material has a meteorite-like texture and a meteorite-like surface roughness.

[0009] A method for preparing a high-strength carbon fiber material with a meteorite-like texture is also provided, which is used to prepare the carbon fiber material mentioned in the claim, comprising the following steps:

[0010] S1. Obtain a carbon fiber sheet and a texture mold, and form a concave-convex structure with a meteorite-like texture on the surface of the texture mold;

[0011] S2, cyclically laying multiple pieces of the carbon fiber sheets in the texture mold at multiple preset angles, and bonding each layer of the carbon fiber sheets by resin; until the multiple layers of the carbon fiber sheets are evenly combined with the resin and cured, and demolded to obtain a primary finished product with a meteorite-like texture on the surface;

[0012] S3. The surface of the primary finished product is roughened to obtain the fiber material.

[0013] It can be seen that the above steps can be used to form a meteorite-like texture and a meteorite-like surface roughness on the surface of the carbon fiber material. Since no chemical additives are introduced to process the carbon fiber sheet, the original strength of the carbon fiber material will not be affected. The material has a rich and novel meteorite-like texture, which improves the disadvantage of the single appearance of the carbon fiber material.

[0014] As an improved solution of the present invention, in step S2, the resin is a thermosetting resin, and the curing process comprises:

[0015] Preliminary curing: firstly, the texture mold stacked with the carbon fiber sheets is placed in a flexible vacuum container, air is extracted from the vacuum container to form a negative pressure; and the vacuum state is maintained at a temperature of 120-180° C. for 60-120 minutes to complete the preliminary curing;

[0016] High temperature and high pressure curing; placing the vacuum container after the preliminary curing into an autoclave, and continuing curing at 170-190°C for 2-4 hours using a pressure of 5-10 MPa.

[0017] As an improved solution of the present invention, the thermosetting resin is epoxy resin.

[0018] As an improved solution of the present invention, before step S1, the carbon fiber sheet needs to be prepreg treated.

[0019] As an improved solution of the present invention, the fiber content of the carbon fiber sheet is 60-65%.

[0020] As an improved solution of the present invention, the fabric density of the carbon fiber sheet is 200g / m2.

[0021] As an improved solution of the present invention, the plurality of preset angles are respectively 0°, 45° and 90°.

[0022] As an improved solution of the present invention, the concave-convex structure includes concave parts with a depth of 0.5-1.5 mm and strip-shaped protrusions randomly distributed between the concave parts.

[0023] As an improved solution of the present invention, in step S3, the surface of the primary finished product after the roughness treatment is subjected to coating treatment to obtain the desired glossiness.

[0024] The beneficial effect of the present invention is: compared with the prior art, the present invention provides a high-strength carbon fiber material with a meteorite-like texture and a preparation method thereof. In terms of process, the carbon fiber sheet is pressed and cured by using a texture mold with a concave-convex structure with a meteorite-like texture, and the surface of the primary finished product obtained after the curing is roughened, so that the surface of the carbon fiber material has a meteorite-like texture and a meteorite-like surface roughness. Since no chemical additives are introduced to process the carbon fiber sheet, the original strength of the carbon fiber material will not be affected, and it has rich and novel meteorite-like textures, which improves the disadvantage of the single appearance of the carbon fiber material. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a process flow chart of the present invention;

[0026] Figure 2 It is a schematic diagram of the laying of the present invention;

[0027] Figure 3-4 This is a schematic diagram of the carbon fiber material product of the present invention. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with the accompanying drawings.

[0029] In the following description, the example details are given to provide a deeper understanding of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. It should be understood that the specific embodiments are only used to explain the present invention and are not used to limit the present invention.

[0030] It should be understood that when the terms "include" and / or "comprises" are used in this specification, they indicate the existence of the stated features, integers, steps, operations, elements or components, but do not exclude the existence or addition of one or more other features, integers, steps, operations, elements, components or combinations thereof.

[0031] In view of the fact that the carbon fiber materials in the prior art are difficult to have both high strength and unique and rich visual appearance texture, the present application provides a high-strength carbon fiber material with a meteorite-like texture. The carbon fiber material is composited by multiple layers of carbon fiber sheets through resin bonding, and the surface of the carbon fiber material has a meteorite-like texture and a meteorite-like surface roughness.

[0032] It can be seen that the surface of the above-mentioned carbon fiber material has a meteorite-like texture and a meteorite-like surface roughness, which greatly enriches the user's visual experience and obtains rich appearance characteristics. It is prepared based on carbon fiber sheets as the main substrate, and then can be implemented and used with spacing strength values.

[0033] This application also provides a method for preparing a high-strength carbon fiber material with a meteorite-like texture. Figure 1-4 , used to prepare the above-mentioned carbon fiber material, comprising the following steps:

[0034] S1. Obtain a carbon fiber sheet and a texture mold, and form a concave-convex structure with a meteorite-like texture on the surface of the texture mold; in order to give the carbon fiber material a meteorite-like texture, the texture mold is designed, its surface is processed, a special texture mold is added during the molding process, and a unique texture with a meteorite-like appearance is pressed under a suitable pressure and temperature environment;

[0035] S2, laying multiple carbon fiber sheets in a texture mold according to multiple preset angles in a loop, thereby enhancing the multi-directional load-bearing capacity of the material and enhancing its impact resistance, and each layer of carbon fiber sheet is bonded by resin; until the multiple layers of carbon fiber sheets are evenly combined with the resin and cured, and demolded to obtain a primary finished product with a meteorite-like texture on the surface;

[0036] S3. The surface of the primary finished product is roughened to obtain carbon fiber material, so that the surface texture has a texture similar to that of the meteorite surface; the surface can be processed by laser etching or sandblasting. Laser etching can accurately adjust the depth and shape of the detailed texture, while sandblasting gives the surface a more uniform matte effect.

[0037] It can be understood that after the preparation is completed, the obtained carbon fiber material can be subjected to parameters such as tensile strength test, bending test, impact resistance test, etc. to ensure that it meets the high-strength standards; the surface texture part is subjected to microscopic analysis and tactile test to verify the fineness and similarity of the meteorite texture; in terms of application, the prepared carbon fiber material not only has a unique appearance and high-end artistic texture, but also its mechanical properties are maintained at a high level, which is suitable for high-end consumer products, electronic product casings and decorative materials.

[0038] Through the above steps, a meteorite-like texture and a meteorite-like surface roughness can be formed on the surface of the carbon fiber material. Since no chemical additives are introduced to process the carbon fiber sheet, the original strength of the carbon fiber material will not be affected. The material has rich and novel meteorite-like textures, which improves the disadvantage of the single appearance of the carbon fiber material. It is worth mentioning that if the carbon fiber material is used for complex structures, CNC machining equipment can be used for further cutting and hole processing to ensure that the product can be seamlessly connected with other parts.

[0039] In this embodiment, in step S2, the resin is a thermosetting resin, and the thermosetting resin can be cured within a specific temperature range to achieve bonding to the carbon fiber sheet. The specific steps of the curing process are:

[0040] Initial curing: First, place the texture mold with the carbon fiber sheets stacked on it in a flexible vacuum container, extract air from the vacuum container to form a negative pressure; and maintain the vacuum state at a temperature of 120-180°C for 60-120 minutes to complete the initial curing;

[0041] High temperature and high pressure curing: Place the vacuum container that has completed the preliminary curing into an autoclave, and continue curing at 170-190°C for 2-4 hours using a pressure of 5-10MPa.

[0042] It is not difficult to understand that in the preliminary curing stage, the texture mold loaded with carbon fiber sheets is placed in a vacuum container to ensure sufficient bonding of multiple layers of carbon fiber sheets. Specifically, in the negative pressure formation stage, it can ensure that the resin can fully penetrate each layer of carbon fiber sheet to avoid bubbles or insufficient infiltration; in the subsequent vacuum state, the carbon fiber sheet and resin can be fully combined and complete the preliminary curing; high temperature and high pressure curing stage, this stage can further improve the density and strength of the material, while ensuring that the surface texture is clearly formed. Under this process, the concave and convex structure of the texture mold is tightly fitted with the carbon fiber sheet to form a unique meteorite-like surface; in the preferred scheme, the thermosetting resin is epoxy resin, and the curing temperature is 120℃-180℃ to ensure the stability of the mechanical properties of the carbon fiber material.

[0043] In a further solution, before step S1, the carbon fiber sheet needs to be prepreg treated; the prepreg treatment can achieve organic bonding of the carbon fiber sheet in the later stage. Among the specific parameters, the fiber content of the carbon fiber sheet is 60-65%, and the fabric density of the carbon fiber sheet is 200g / m2.

[0044] In an important embodiment, multiple preset angles are 0°, 45° and 90°, respectively. The analysis is carried out in combination with examples as follows: three carbon fiber sheets are obtained, namely the first sheet, the second sheet and the third sheet. The first sheet, the second sheet and the third sheet are each provided with a first texture straight line, a second texture straight line and a third texture straight line respectively. The texture mold is provided with a reference layer respectively. The fiber direction of the reference layer is used as a reference line. When laying, the first texture straight line of the first sheet overlaps with the standard line, and thus is 0°. The first texture straight line of the second sheet is perpendicular to the standard line, and thus is 90°. The third texture straight line of the third sheet intersects with the reference line, and thus is 45°. By analogy, the above-mentioned laying action is repeated to obtain a carbon fiber material with high load-bearing capacity.

[0045] In a specific solution, the concave-convex structure includes a concave portion with a depth of 0.5-1.5 mm and strip-shaped protrusions randomly distributed between the concave portions, which can make the carbon fiber material have a stronger simulation effect.

[0046] In a more optimal solution, in step S3, the surface of the primary finished product after the roughening treatment is coated to obtain the expected glossiness; in actual production, according to customer needs, a high-gloss or matte coating is applied to the surface of the carbon fiber material to enhance protection and visual effects. The coating can also improve the material's wear resistance, corrosion resistance and UV resistance.

[0047] Product Data:

[0048] The carbon fiber material sheets prepared in the above embodiment scheme and the traditional BMC / SMC carbon fiber material sheets were obtained for performance comparison, and the results are as follows:

[0049] This application Carbon fiber materials for BMC / SMC tensile strength 360Mpa 160-260Mpa Bending strength 510Mpa 390-420Mpa density <![CDATA[1.45-1.47g / cm 3 ]]> <![CDATA[1.51-1.66g / cm 3 ]]> Curing speed capacity 1mm / min 1mm / 30-40min Finished product qualification rate 95％ 50％

[0050] It can be seen from the above table that the material obtained in this application has a 38% improvement in tensile strength compared with traditional carbon fiber BMC / SMC materials; and the flexural strength is also higher than the 420MPa of the prior art; while ensuring the strength, the density requirement is lower, and it has the advantage of lightweight weight; in terms of production, the production capacity and pass rate are better than the prior art, and have greater market development value.

[0051] The advantages of the present invention are:

[0052] Compared with the existing technology, the present invention solves many problems of carbon fiber materials in appearance design, mechanical properties and production process, and provides an innovative material that has both high strength and light weight and a unique meteorite-like appearance. It is suitable for a wide range of high-end application fields and has significant market competitive advantages.

[0053] The above disclosures are only several specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A high-strength carbon fiber material with a meteorite-like texture, characterized in that: The fiber material is formed by bonding multiple layers of carbon fiber sheets by resin, and the surface of the fiber material has a meteorite-like texture and a meteorite-like surface roughness.

2. A method for preparing a high-strength carbon fiber material with a meteorite-like texture, characterized in that: The method for preparing the carbon fiber material according to claim 1 comprises the following steps: S1. Obtain a carbon fiber sheet and a texture mold, and form a concave-convex structure with a meteorite texture on the surface of the texture mold; S2, cyclically laying multiple pieces of the carbon fiber sheets in the texture mold at multiple preset angles, and bonding each layer of the carbon fiber sheets by resin; until the multiple layers of the carbon fiber sheets are evenly combined with the resin and cured, and demolded to obtain a primary finished product with a meteorite-like texture on the surface; S3. The surface of the primary finished product is roughened to obtain the fiber material.

3. The preparation method according to claim 2, characterized in that: In step S2, the resin is a thermosetting resin, and the curing process comprises: Preliminary curing: firstly, the texture mold stacked with the carbon fiber sheets is placed in a flexible vacuum container, air is extracted from the vacuum container to form a negative pressure; and the vacuum state is maintained at a temperature of 120-180° C. for 60-120 minutes to complete the preliminary curing; High temperature and high pressure curing; placing the vacuum container after the preliminary curing into an autoclave, and continuing curing at 170-190°C for 2-4 hours using a pressure of 5-10MPa.

4. The preparation method according to claim 3, characterized in that: The thermosetting resin is epoxy resin.

5. The preparation method according to claim 3, characterized in that: Before step S1, the carbon fiber sheet needs to be prepreg treated.

6. The preparation method according to claim 5, characterized in that: The fiber content of the carbon fiber sheet is 60-65%.

7. The preparation method according to claim 6, characterized in that: The fabric density of the carbon fiber sheet is 200g / m 2 .

8. The preparation method according to claim 3, characterized in that: The plurality of preset angles are respectively 0°, 45° and 90°.

9. The preparation method according to claim 3, characterized in that: The concave-convex structure includes concave parts with a depth of 0.5-1.5 mm and strip-shaped protrusions randomly distributed between the concave parts.

10. The preparation method according to claim 3, characterized in that: In step S3, a coating process is performed on the surface of the primary finished product after the roughness treatment to obtain a desired glossiness.

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