Lightweight high-strength fiber resin composite material and preparation method thereof

Abstract

The invention relates to the technical field of novel materials, in particular to a lightweight high-strength fiber resin composite material and a preparation method thereof. The composite material is obtained by combining a fiber laminated body and a resin matrix and then curing and molding, the fiber laminated body accounts for 50-75wt% of the total mass of the light-weight high-strength fiber resin composite material; the fiber laminated body comprises a first laminated body formed by basalt fiber cloth, a second laminated body formed by basalt fiber cloth, and a carbon fiber laminated body sandwiched between the first laminated body and the second laminated body, wherein the carbon fiber laminated body is formed by laminating carbon fiber cloth. The invention also provides a method for preparing the lightweight high-strength fiber resin composite material. According to the composite material, on the basis of guaranteeing the flame resistance and the light weight, the mechanical property is improved, and application of the composite material in the fields of low-altitude economy and light-weight composite materials is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of new materials, and particularly to a lightweight and high-strength fiber resin composite material and a preparation method thereof. Background Art

[0002] Fiber-reinforced composite materials have good application prospects in the lightweighting of vehicles such as the low-altitude economy and automobiles. Basalt fiber and carbon fiber are both among the four high-performance fiber materials in China. The density of basalt fiber cloth is high, which is not conducive to its application in lightweight composite materials, while the density of carbon fiber cloth is low but its flame resistance is worse.

[0003] Currently, fiber-reinforced composite materials made of basalt fiber and carbon fiber can solve and achieve the complementarity of their flame resistance and low density (lightweight) performance. However, as people's requirements for the load and safety performance of vehicles are getting higher and higher, the mechanical properties requirements for fiber-reinforced composite materials are also getting higher and higher, such as the flexural strength.

[0004] In the prior art, CN117301571A discloses a basalt fiber-carbon fiber alternating resin-based composite material and a preparation method thereof, which specifically discloses the preparation of a basalt fiber-carbon fiber alternating resin-based composite material based on staggered stacking and laying, and micro-nano aramid short fibers are introduced into the resin matrix to construct a fiber bridging structure between fiber layers, so that the flexural strength of the basalt fiber-carbon fiber alternating resin-based composite material reaches 532 - 563.60 MPa.

[0005] CN113846489A discloses a conductive modified basalt fiber cloth, a basalt fiber-reinforced polymer composite material with low insulation and a preparation method thereof, and specifically discloses that the fiber laminate is composed of two carbon fiber cloth layers and a conductive modified basalt fiber cloth layer sandwiched between the two carbon fiber cloth layers. It solves the conductive / insulating performance of the composite material, but the improvement of its mechanical properties is unknown.

[0006] In summary, how to improve the mechanical properties of fiber-reinforced composite materials without changing their flame resistance and lightweighting still faces technical challenges. Summary of the Invention

[0007] The present invention provides a lightweight and high-strength fiber resin composite material and a preparation method thereof to solve the above technical problems. Without changing the flame resistance and lightweighting of fiber-reinforced composite materials, the problem of poor mechanical properties of fiber-reinforced composite materials is solved, and the mechanical properties of fiber-reinforced composite materials are improved.

[0008] The technical solution of the present invention to solve the above technical problems is as follows:

[0009] The lightweight high-strength fiber resin composite material is obtained by curing after the combination of a fiber laminate and a resin matrix; wherein, the fiber laminate accounts for 50-75 wt% of the total mass of the lightweight high-strength fiber resin composite material;

[0010] The fiber laminate includes:

[0011] The first laminate formed by laminating x layers of basalt fiber cloth layers in sequence, and

[0012] The second laminate formed by laminating y layers of basalt fiber cloth layers in sequence, and

[0013] The carbon fiber laminate sandwiched between the first laminate and the second laminate, and the carbon fiber laminate is formed by laminating z layers of carbon fiber cloth layers in sequence;

[0014] Wherein, x, y, and z represent natural numbers greater than or equal to 2; x + y + z ≤ 20; y - 1 ≤ x ≤ y + 1; z:x + y = 1:(0.25 - 4).

[0015] In a specific embodiment of the present invention, the basalt fiber cloth layer is twill cloth, with a thickness of 0.2 - 0.8 mm, a surface density of 200 - 600 g / m 3 , and the warp tensile strength is 800 - 1200 MPa.

[0016] In a specific embodiment of the present invention, the carbon fiber cloth layer is twill cloth, with a thickness of 0.2 - 0.5 mm, a surface density of 150 - 600 g / m 2 . The warp tensile strength is 600 - 1400 MPa.

[0017] In a specific embodiment of the present invention, the flexural strength of the lightweight high-strength fiber resin composite material is 800 - 1000 MPa.

[0018] In a specific embodiment of the present invention, the resin in the resin matrix is phenolic resin, epoxy resin, unsaturated polyester, polyester resin, styrene resin, polyamide resin, polyurethane thermoplastic elastomer, polyether resin or polycarbonate resin.

[0019] The method for preparing the above lightweight high-strength fiber resin composite material includes the following steps:

[0020] 1) Impregnation: Treating x + y layers of basalt fiber cloth layers and z layers of carbon fiber cloth layers through impregnation to obtain impregnated cloth;

[0021] 2) Preparing the glue solution: Dissolving resin monomers and curing agents in a solvent to obtain a glue solution;

[0022] 3) Pre-impregnation: evenly apply the glue solution from step 2) on the surface of the impregnated cloth from step 1), and dry it to obtain a pre-impregnated cloth;

[0023] 4) Hot pressing and curing: The prepregs obtained in step 3) are stacked sequentially, ensuring that the z carbon fiber cloth layers are between the x basalt fiber cloth layers and the y basalt fiber cloth layers, and hot pressing and curing is performed to obtain a lightweight and high-strength fiber resin composite material.

[0024] In a specific embodiment of the present invention, in step 1) impregnation, the impregnation treatment is to arrange the basalt fiber cloth and the carbon fiber in an impregnation liquid for immersion, and then take them out and dry them; preferably, the impregnation liquid is any one of acetone, ethanol, and chloroform; preferably, the impregnation is carried out at room temperature for 4 to 10 hours.

[0025] In a specific embodiment of the present invention, in step 2) preparing a glue solution, the solid content of the glue solution is 50-70 wt%.

[0026] In a specific embodiment of the present invention, in step 3) pre-impregnation, the drying refers to drying at 120-160° C. for 0.3-0.6 h.

[0027] In a specific embodiment of the present invention, step 4) hot pressing curing refers to hot pressing at 120-180° C. for 0.1-0.5 h and then hot pressing at 180-280° C. for 1-4 h under a pressure of 2-8 MPa.

[0028] The beneficial effects of the present invention are:

[0029] 1. The lightweight, high-strength fiber-resin composite material of the present invention comprises a carbon fiber cloth layer sandwiched between a first laminate and a second laminate composed of basalt fiber cloth layers in a laminated form. This improves mechanical properties while maintaining flame resistance and lightweight properties, facilitating its application in the fields of low-altitude economical and lightweight composite materials.

[0030] 2. The lightweight, high-strength fiber-resin composite material of the present invention has a flexural strength of 800-1000 MPa, which is approximately 14.3-66.6% higher than the flexural strength of 600-700 MPa achieved by alternating layers of carbon fiber and basalt fiber. It also achieves a maximum flexural strength of 26.6% higher than the flexural strength of approximately 790 MPa achieved by sandwiching basalt layers between carbon fiber layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of the lightweight high-strength fiber-resin composite material of the present invention;

[0032] Figure 2The anti-bending strength curve graph of the lightweight and high-strength fiber resin composite material provided by Embodiment 1 of the present invention;

[0033] Figure 3 The anti-bending strength curve graph of the lightweight and high-strength fiber resin composite material provided by Embodiment 2 of the present invention;

[0034] Figure 4 The anti-bending strength curve graph of the lightweight and high-strength fiber resin composite material provided by Embodiment 3 of the present invention;

[0035] Figure 5 The anti-bending strength curve graph of the lightweight and high-strength fiber resin composite material provided by Embodiment 4 of the present invention;

[0036] Figure 6 The carbon element distribution graphs of five materials provided by Embodiment 5 of the present invention; wherein, A is 10B0C; B is 4B1C5B; C is 4B2C4B; D is 3B3C4B; E is 3B4C3B;

[0037] Figure 7 The TGA thermogravimetric curve graph of five materials provided by Embodiment 5 of the present invention;

[0038] Figure 8 The bar graph of the impact strength and interlaminar shear strength of five materials provided by Embodiment 5 of the present invention;

[0039] Figure 9 The DMA data loss tangent of five materials provided by Embodiment 5 of the present invention; wherein, loss langent represents the loss tangent of the angle;

[0040] Figure 10 The cross-sectional morphology graph of 3B4C3B at 10 μm provided by Embodiment 5 of the present invention;

[0041] Figure 11 The cross-sectional morphology graph of 3B4C3B at 100 μm provided by Embodiment 5 of the present invention;

[0042] Figure 12 The anti-bending strength curve graph of the composite material provided by Comparative Example 1 of the invention;

[0043] Figure 13 The anti-bending strength curve graph of the composite material provided by Comparative Example 2 of the invention;

[0044] Figure 14 The anti-bending strength curve graph of the composite material provided by Comparative Example 3 of the invention;

[0045] Figure 15 The anti-bending strength curve graph of the composite material provided by Comparative Example 4 of the invention;

[0046] Figure 16 The bending strength curve graph of the composite material provided for Invention Comparative Example 5;

[0047] Figure 17 The bending strength curve graph of the composite material provided for Invention Comparative Example 6.

[0048] Appendix Figure 1 In the appendix, the list of components represented by each label is as follows:

[0049] 1. The first laminate; 2. The second laminate; 3. The carbon fiber laminate. Specific Embodiments

[0050] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0051] Based on the appendix Figure 1 , the lightweight high-strength fiber resin composite material is obtained by curing after the combination of a fiber laminate and a resin matrix; wherein, the fiber laminate accounts for 50-75 wt% of the total mass of the lightweight high-strength fiber resin composite material;

[0052] The fiber laminate includes:

[0053] The first laminate 1 formed by laminating x layers of basalt fiber cloth layers in sequence, and

[0054] The second laminate 2 formed by laminating y layers of basalt fiber cloth layers in sequence, and

[0055] The carbon fiber laminate 3 sandwiched between the first laminate and the second laminate, and the carbon fiber laminate 3 is formed by laminating z layers of carbon fiber cloth layers in sequence;

[0056] Wherein, x, y, and z represent natural numbers greater than or equal to 2; x + y + z ≤ 20; y - 1 ≤ x ≤ y + 1; z: x + y = 1: (0.25 - 4).

[0057] In some examples, the basalt fiber cloth layer is twill cloth, with a thickness of 0.2 - 0.8 mm, a surface density of 200 - 600 g / m 2 , and the warp tensile strength is 800 - 1200 MPa.

[0058] In some examples, the carbon fiber cloth layer is twill cloth, with a thickness of 0.2 - 0.5 mm and a surface density of 150 - 600 g / m 2。The warp tensile strength is 600 - 1400 MPa.

[0059] In some examples, the flexural strength of the lightweight high-strength fiber resin composite is 800 - 1000 MPa.

[0060] In some examples, the resin in the resin matrix is phenolic resin, epoxy resin, unsaturated polyester, polyester resin, styrene resin, polyamide resin, polyurethane thermoplastic elastomer, polyether resin or polycarbonate resin.

[0061] The method for preparing the above lightweight high-strength fiber resin composite includes the following steps:

[0062] 1) Impregnation: Treat x + y layers of basalt fiber cloth and z layers of carbon fiber cloth through impregnation to obtain impregnated cloth;

[0063] 2) Prepare the glue solution: Take resin monomer and curing agent and dissolve them in a solvent to obtain the glue solution;

[0064] 3) Pre-impregnation: Uniformly coat the glue solution in step 2) on the surface of the impregnated cloth in step 1), and obtain pre-impregnated cloth after drying;

[0065] 4) Hot pressing and curing: Stack the pre-impregnated cloth obtained in step 3) in sequence, and ensure that z layers of carbon fiber cloth are between x layers of basalt fiber cloth and y layers of basalt fiber cloth, and perform hot pressing and curing to obtain the lightweight high-strength fiber resin composite.

[0066] In some examples, for the impregnation in step 1), the impregnation treatment is to place the basalt fiber cloth and carbon fiber cloth in an impregnating solution for impregnation and then take them out for drying; the impregnating solution is any one of acetone, ethanol, and chloroform; preferably, impregnate at room temperature for 4 - 10 h.

[0067] In some examples, for the preparation of the glue solution in step 2), the solid content in the glue solution is 50 - 70 wt%.

[0068] In some examples, for the preparation of the glue solution in step 2), the glue solution is obtained by mixing epoxy resin E51 and curing agent in proportion and dissolving them in DMF to obtain a glue solution with a solid content of 50 - 70 wt%; the dosage of the curing agent relative to the epoxy resin is designed according to the requirement of the solid content.

[0069] In some examples, for the pre-impregnation in step 3), the drying means drying at 120 - 160 °C for 0.3 - 0.6 h.

[0070] In some examples, for the hot pressing and curing in step 4), the hot pressing and curing means under a pressure of 2 - 8 MPa, first hot press at 120 - 180 °C for 0.1 - 0.5 h, and then hot press at 180 - 280 °C for 1 - 4 h.

[0071] To further prove the role of the lightweight and high-strength fiber resin composite material of the present invention in improving its mechanical properties, the following examples and comparative examples are provided:

[0072] Raw materials for the following examples:

[0073] The basalt fiber cloth has a thickness of 0.5 mm and a surface density of 450 g / m 2 , purchased from Sichuan Juyuan Basalt Fiber Technology Co., Ltd.;

[0074] The carbon fiber cloth has a thickness of 0.45 mm and a surface density of 350 g / m 2 , purchased from Yixing Qianyu Materials Technology Co., Ltd.;

[0075] Epoxy resin E51, purchased from Chengdu Kelong Chemical Co., Ltd.;

[0076] The curing agent is 2-methylimidazole (CAS No.: 693-98-1), purchased from Chengdu Kelong Chemical Co., Ltd.;

[0077] Acetone, analytical pure (AR).

[0078] Example 1

[0079] This example prepares a lightweight and high-strength fiber resin composite material, including the following steps:

[0080] 1. Cut the basalt fiber cloth (hereinafter referred to as BF or B) and the carbon fiber cloth (hereinafter referred to as CF or C) into squares of 10 cm × 10 cm, and then immerse BF and CF in acetone at room temperature for 2 h to remove surface impurities and surface treatment agents, and dry for later use;

[0081] 2. Dissolve epoxy resin E51 and the curing agent in DMF to prepare a glue solution with a solid content of 60 wt%;

[0082] 3. Take the glue solution according to 40 wt% of the total mass of the lightweight and high-strength fiber resin composite material, as well as 4 impregnated and dried carbon fiber cloths and 4 impregnated and dried basalt fiber cloths, and evenly coat the glue solution on the surfaces of the carbon fiber cloth and the basalt fiber cloth; after coating, place it in an oven at 150 °C and dry for 20 min, take it out and cool to obtain a prepreg cloth;

[0083] 4. Stack the prepreg cloths in the following order: B - B - C - C - C - C - B - B;

[0084] Place it on a hot press and perform hot pressing and curing at 5 MPa, specifically: first keep it at 140 °C for 30 min, then keep it at 180 °C for 120 min, and finally cool to obtain the lightweight and high-strength fiber resin composite material (hereinafter referred to as BBCCCCBB).

[0085] In this example, a lightweight and high-strength fiber resin composite material was sampled and its flexural strength was detected according to the flexural strength test method in GB / T 9341-2008 "Determination of Flexural Properties of Plastics". The results are as shown in the appendix Figure 2 as follows

[0086] Example 2

[0087] In this example, a lightweight and high-strength fiber resin composite material was prepared according to the method of Example 1. The difference from Example 1 is that

[0088] The prepreg cloth was stacked in the following order: B-B-B-B-B-C-C-C-C-C-B-B-B-B-B

[0089] The lightweight and high-strength fiber resin composite material prepared in this example is abbreviated as 5B5C5B

[0090] In this example, the lightweight and high-strength fiber resin composite material was sampled and its flexural strength was detected. The results are as shown in the appendix Figure 3 as follows

[0091] Example 3

[0092] In this example, a lightweight and high-strength fiber resin composite material was prepared according to the method of Example 1. The difference from Example 1 is that

[0093] The prepreg cloth was stacked in the following order: B-B-B-B-B-C-C-C-C-C-C-C-C-C-C-B-B-B-B-B

[0094] The lightweight and high-strength fiber resin composite material prepared in this example is abbreviated as 5B10C5B

[0095] In this example, the lightweight and high-strength fiber resin composite material was sampled and its flexural strength was detected. The results are as shown in the appendix Figure 4 as follows

[0096] Example 4

[0097] In this example, a lightweight and high-strength fiber resin composite material was prepared according to the method of Example 1. The difference from Example 1 is that

[0098] The prepreg cloth was stacked in the following order: B-B-B-B-B-B-C-C-C-C-C-C-C-C-B-B-B-B-B-B

[0099] The lightweight and high-strength fiber resin composite material prepared in this example is abbreviated as 6B8C6B

[0100] In this example, a lightweight and high-strength fiber resin composite material was sampled and its flexural strength was tested. The results are shown in the appendix Figure 5 as follows.

[0101] Example 5 studied the effects of adding carbon fiber cloth on the combustion resistance and lightweight properties of lightweight and high-strength fiber resin composite materials

[0102] In this example, 5 materials with a total of 10 fiber cloth layers were prepared according to the method of Example 1, namely 10B0C, 4B1C5B(9B1C), 4B2C4B(8B2C), 3B3C4B(7B3C), and 3B4C3B(6B4C).

[0103] I. The carbon element distribution of the 5 materials in this example is shown in the appendix Figure 6 as follows; in the appendix Figure 6 , A is 10B0C; B is 4B1C5B; C is 4B2C4B; D is 3B3C4B; E is 3B4C3B.

[0104] II. The densities of the 5 materials in this example were tested, and the results are statistically shown in Table 1.

[0105] Table 1

[0106] Sample 10B0C 4B1C5B 4B2C4B 3B3C4B 3B4C3B <![CDATA[Density (g / cm 3 )]]> 2.11 2.07 1.91 1.88 1.78

[0107] As can be seen from Table 1, with the addition and increase in the number of carbon fiber cloth, the material density can be reduced.

[0108] III. The 5wt% decomposition temperature, 10wt% decomposition temperature, and char residue rate of the 5 materials in this example were tested, and the results are statistically shown in Table 2.

[0109] Table 2

[0110]

[0111]

[0112] As can be seen from Table 2, with the addition and increase in the number of carbon fiber cloth layers, the thermal stability of the material slightly decreases, but the impact is not significant.

[0113] IV. The TGA thermogravimetric curves of the 5 materials in this example were obtained, and the results are shown in the appendix Figure 7 as follows.

[0114] According to the appendix Figure 7 it can be seen that with the addition and increase in the number of carbon fiber cloth layers, the thermal stability of the material changes little.

[0115] V. The impact strength and interlaminar shear strength of the 5 materials in this example were tested, and the results are shown in the appendix Figure 8 as follows.

[0116] According to the attached Figure 8 It can be seen that the addition and increasing quantity of carbon fiber will improve the impact strength and shear strength of the material.

[0117] Sixth, test the DMA data of the 5 materials in this example, and the results are as shown in the attached Figure 9 and Table 3; in the attached Figure 9 , losslangent represents the tangent of the loss angle; in Table 3, T tanδ is the glass transition temperature obtained from the tangent of the loss angle, and T loss is the glass transition temperature obtained from the loss modulus

[0118] Table 3

[0119]

[0120] From the attached Figure 9 and Table 3, it can be seen that the addition of carbon fiber cloth will slightly reduce the heat resistance of the material, but will increase the storage modulus.

[0121] Seventh, the cross-sectional morphology of 3B4C3B in this example is as shown in the attached Figure 10 and 11 shown.

[0122] From the attached Figure 10 and 11 it can be seen that CF and BF both have good bonding ability with epoxy resin.

[0123] Eighth, the microcalorimetry data (heat release capacity, peak heat release rate, total heat release amount, and T max ) of the 5 materials in this example are statistically shown in Table 4.

[0124] Table 4

[0125]

[0126] From Table 4, it can be seen that the addition of carbon fiber cloth will increase the heat release rate and reduce the heat release temperature, but the amplitude is not large.

[0127] Ninth, the statistical results of the limiting oxygen index test of the materials in Example 5 are shown in Table 5

[0128] Table 5

[0129] Sample Limiting Oxygen Index 10B0C 29.2 4B1C5B 28.0 4B2C4B 27.8 3B3C4B 27.6 3B4C3B 27.5

[0130] From Table 5, it can be seen that the addition of carbon fiber cloth will reduce the limiting oxygen index of the material, but the amplitude is not large, and it is still a non-combustible material (limiting oxygen index > 27).

[0131] According to the above test results, it shows that the composite material made of carbon fiber cloth and basalt fiber cloth can not only ensure that the fire resistance of the composite material is not damaged, but also achieve the purpose of lightweight of the composite material.

[0132] Comparative Example 1

[0133] A composite material was prepared according to the method of Example 1 in this comparative example. The difference from Example 1 is that:

[0134] The prepreg cloth was stacked in the following order: B-C-B-C-B-C-B-C-B.

[0135] The composite material of this comparative example was sampled and tested for flexural strength. The results are as follows Figure 12 shown.

[0136] Comparative Example 2

[0137] A composite material was prepared according to the method of Example 1 in this comparative example. The difference from Example 1 is that:

[0138] The prepreg cloth was stacked in the following order: B-B-C-C-B-B-C-C-B-B-C-C-B-B.

[0139] The composite material of this comparative example was sampled and tested for flexural strength. The results are as follows Figure 13 shown.

[0140] Comparative Example 3

[0141] A composite material was prepared according to the method of Example 1 in this comparative example. The difference from Example 1 is that:

[0142] The prepreg cloth was stacked in the following order: B-B-B-B-C-C-C-C.

[0143] The composite material of this comparative example was sampled and tested for flexural strength. The results are as follows Figure 14 shown.

[0144] Comparative Example 4

[0145] A composite material was prepared according to the method of Example 1 in this comparative example. The difference from Example 1 is that:

[0146] The prepreg cloth was stacked in the following order: C-C-B-B-B-B-C-C.

[0147] The composite material of this comparative example was sampled and tested for flexural strength. The results are as follows Figure 15 shown.

[0148] Comparative Example 5

[0149] This comparative example prepared a composite material according to the method of Example 1, the difference from Example 1 being that:

[0150] The prepreg cloth was stacked in the following order: C - C - B - B - B - B - C - C.

[0151] The composite material prepared in this comparative example is abbreviated as 4C12B4C.

[0152] The composite material of this comparative example was sampled and tested for flexural strength, and the results are as shown in the appendix Figure 16 as follows.

[0153] Comparative Example 6

[0154] This comparative example prepared a composite material according to the method of Example 1, the difference from Example 1 being that:

[0155] The prepreg cloth was stacked in the following order: C - C - C - C - C - C - C - C - C - C - B - B - B - B - B - B - B - B - B - B.

[0156] The composite material prepared in this comparative example is abbreviated as 10C10B.

[0157] The composite material of this comparative example was sampled and tested for flexural strength, and the results are as shown in the appendix Figure 17 as follows.

[0158] According to the flexural strength results of Examples 1 - 4 and Comparative Examples 1 - 6, it shows that for the lightweight and high-strength fiber resin composite material made of carbon fiber cloth and basalt fiber cloth, and the z-layer carbon fiber cloth is interposed inside the basalt fiber cloth to form the first laminate and the second laminate in a laminated manner, it significantly improves the flexural strength of the composite material, and the flexural strength of the composite material exceeds 950 MPa, and can even reach 1000 MPa, with excellent mechanical properties; while arranging the carbon fiber cloth staggered between the basalt fiber cloth layers, or placing the laminate of the carbon fiber cloth outside the composite material, the obtained composite material has poor mechanical properties.

[0159] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A lightweight and high-strength fiber resin composite material, characterized in that: It is obtained by curing after the combination of a fiber laminate and a resin matrix; wherein, the fiber laminate accounts for 50-75 wt% of the total mass of the lightweight high-strength fiber resin composite material; The fiber laminate includes: The first laminate formed by laminating x layers of basalt fiber cloth layers in sequence, and The second laminate formed by laminating y layers of basalt fiber cloth layers in sequence, and A carbon fiber laminate sandwiched between the first laminate and the second laminate, and the carbon fiber laminate is formed by laminating z layers of carbon fiber cloth layers in sequence; Wherein, x, y, and z represent natural numbers greater than or equal to 2; x + y + z ≤ 20; y - 1 ≤ x ≤ y + 1; z:(x + y)=1:(0.25 - 4).

2. The lightweight high-strength fiber resin composite material according to claim 1, characterized in that: The basalt fiber cloth layer is twill cloth with a thickness of 0.2 - 0.8 mm and a surface density of 200 - 600 g / m 2 , and the tensile strength in the warp direction is 800 - 1200 MPa.

3. The lightweight high-strength fiber resin composite material according to claim 1, wherein: The carbon fiber cloth layer is twill cloth with a thickness of 0.2 to 0.5 mm and a surface density of 150 to 600 g / m 2 . The tensile strength in the warp direction is 600-1400 MPa.

4. The lightweight and high-strength fiber resin composite material according to claim 1, wherein: The flexural strength of the lightweight high-strength fiber resin composite material is 800-1000 MPa.

5. The lightweight high-strength fiber resin composite material according to claim 1, wherein: The resin in the resin matrix is a phenolic resin, an epoxy resin, an unsaturated polyester, a polyester resin, a styrene resin, a polyamide resin, a polyurethane thermoplastic elastomer, a polyether resin, or a polycarbonate resin.

6. A method for preparing the lightweight high-strength fiber resin composite material according to any one of claims 1-5, characterized in that, It includes the following steps: 1) Impregnation: Impregnate x + y layers of basalt fiber cloth layers and z layers of carbon fiber cloth layers through impregnation treatment to obtain impregnated cloth; 2) Prepare the glue solution: Dissolve the resin monomer and the curing agent in a solvent to obtain the glue solution; 3) Pre-impregnation: Uniformly coat the glue solution in step 2) on the surface of the impregnated cloth in step 1), and dry it to obtain pre-impregnated cloth; 4) Hot pressing and curing: Stack the pre-impregnated cloth obtained in step 3) in sequence, and ensure that z layers of carbon fiber cloth layers are between x layers of basalt fiber cloth layers and y layers of basalt fiber cloth layers, and perform hot pressing and curing to obtain the lightweight high-strength fiber resin composite material.

7. The method according to claim 6, characterized in that: In step 1) impregnation, the impregnation treatment is to place the basalt fiber cloth and the carbon fiber cloth in an impregnating solution for impregnation and then take them out and dry; preferably, the impregnating solution is any one of acetone, ethanol, and chloroform; preferably, impregnate at room temperature for 4-10 h.

8. The method according to claim 6, wherein: In step 2) prepare the glue solution, the solid content in the glue solution is 50-70 wt%.

9. The method according to claim 6, characterized in that: In step 3) pre-impregnation, the drying means drying at 120-160 °C for 0.3-0.6 h.

10. The method according to claim 6, characterized in that: In step 4) hot pressing and curing, the hot pressing and curing means under a pressure of 2-8 MPa, first hot press at 120-180 °C for 0.1-0.5 h, and then hot press at 180-280 °C for 1-4 h.

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