A composite engineering material for delaying aging and its preparation method

Abstract

The present invention belongs to the field of new materials, and particularly relates to a composite engineering material for delaying aging and a preparation method thereof. A composite engineering material for delaying aging, calculated by weight, the raw materials for its preparation include 500-800 parts of poly(dicyclopentadiene) Parmax resin, 20-30 parts of norbornene dianhydride modified carbon fiber, 10-20 parts of ultra-high molecular weight polyethylene fiber, 10-15 parts of fumed silica, 5-8 parts of coupling agent, and 8-12 parts of anti-aging agent; the anti-aging agent is composed of an antioxidant, a light stabilizer, an ultraviolet absorber, and a light shielding agent mixed in a mass ratio of 1:(0.6-0.8):(0.4-0.6):(0.2-0.3). The composite engineering material for delaying aging provided by this application has excellent aging resistance and wear resistance.

Description

Technical Field

[0001] The present invention belongs to the field of new materials, and particularly relates to a composite engineering material for delaying aging and a preparation method thereof. Background Art

[0002] New energy vehicles refer to vehicles that use non-traditional fuels, such as electric vehicles, hybrid vehicles, etc. Under the pressure of energy and environmental protection, new energy vehicles have become the development direction of the automotive industry. Compared with traditional fuel vehicles, the lightweighting of new energy vehicles is more urgent. Lightweight materials can reduce the weight of vehicles, thereby reducing energy consumption and emissions.

[0003] Polydicyclopentadiene (PDCPD) is a new type of high impact engineering plastic that emerged in the international market after the 1990s. Due to the low density, high strength, high hardness, high impact resistance and excellent corrosion resistance of PDCPD materials, PDCPD can replace metals or fiberglass and be applied to the outer shells and other components of new energy vehicles, making new energy vehicles lightweight. Moreover, PDCPD belongs to environmentally friendly materials. However, due to the poor wear resistance of PDCPD and the presence of unsaturated double bonds, the physical or chemical structure of PDCPD will change during use, resulting in low aging resistance and reducing the service life of the outer shells of new energy vehicles.

[0004] In order to improve the service life of the outer shells of new energy vehicles, anti-aging additives such as heat stabilizers, ultraviolet absorbers and antioxidants are often added to PDCPD, which can improve the aging resistance of PDCPD, but cannot improve the wear resistance of PDCPD. Summary of the Invention

[0005] In order to improve the aging resistance and wear resistance of PDCPD, the present application provides a composite engineering material for delaying aging and a preparation method thereof.

[0006] In the first aspect, the present application provides a composite engineering material for delaying aging, which is realized by the following technical solution: A composite engineering material for delaying aging, by weight, its preparation raw materials include 500 - 800 parts of polydicyclopentadiene Parmax resin, 20 - 30 parts of norbornene dianhydride modified carbon fiber, 10 - 20 parts of ultra-high molecular weight polyethylene fiber, 10 - 15 parts of fumed silica, 5 - 8 parts of coupling agent, and 8 - 12 parts of anti-aging additive; the anti-aging additive is composed of antioxidant, light stabilizer, ultraviolet absorber and light shielding agent mixed in a mass ratio of 1:(0.6 - 0.8):(0.4 - 0.6):(0.2 - 0.3).

[0007] By adopting the above technical solution, norbornene dianhydride is introduced onto the surface of carbon fiber by modifying carbon fiber with norbornene dianhydride, which improves the interfacial bonding force between carbon fiber, polydicyclopentadiene Parmax resin and ultra-high molecular weight polyethylene fiber, and enhances the wear resistance of the material. The combined action of norbornene dianhydride modified carbon fiber and ultra-high molecular weight polyethylene fiber not only improves the wear resistance of the material, but also enhances the stability of the anti-aging agent, preventing the abnormal precipitation of the anti-aging agent and improving the aging resistance of the material. The coupling agent improves the compatibility between fumed silica and other components, enhances the wear resistance of the material, and also improves the dispersibility of the anti-aging agent, thereby improving the aging resistance of the material.

[0008] Preferably, the preparation method of the norbornene dianhydride modified carbon fiber comprises the following steps:

[0009] S1. Immerse the carbon fiber in the oxidation solution, take it out and wash it to obtain the carbon fiber after surface oxidation treatment;

[0010] S2. Dissolve norbornene dianhydride in ethanol, then add the carbon fiber after surface oxidation treatment, and react at 80 - 100 °C for 10 - 16 h, then wash it to obtain the norbornene dianhydride modified carbon fiber;

[0011] The mass ratio of the norbornene dianhydride, ethanol and the carbon fiber after surface oxidation treatment is (0.1 - 0.2):5:1.

[0012] By adopting the above technical solution, oxygen active functional groups such as hydroxyl groups and carboxyl groups are formed on the surface of the carbon fiber after oxidation etching with the oxidation solution, and then the norbornene dianhydride modified carbon fiber is prepared by grafting with norbornene dianhydride. It can form a network structure by chemical bonding with polydicyclopentadiene Parmax resin, improving the interfacial bonding force between the norbornene dianhydride modified carbon fiber, polydicyclopentadiene Parmax resin and ultra-high molecular weight polyethylene fiber, and enhancing the wear resistance of the composite engineering material for delaying aging.

[0013] Preferably, the oxidation solution is composed of 10 wt% sodium chlorate aqueous solution and 25 wt% sulfuric acid aqueous solution mixed according to a mass ratio of 1:(0.8 - 1.2).

[0014] By adopting the above technical solution, the oxidation solution composed of 10 wt% sodium chlorate aqueous solution and 25 wt% sulfuric acid aqueous solution increases the content of oxygen active functional groups on the surface of the carbon fiber, and at the same time increases the roughness of the carbon fiber, which is beneficial to improving the grafting rate of norbornene dianhydride, enhancing the interfacial bonding force between the norbornene dianhydride modified carbon fiber, polydicyclopentadiene Parmax resin and ultra-high molecular weight polyethylene fiber, and thus enhancing the wear resistance of the composite engineering material for delaying aging.

[0015] Preferably, the coupling agent is formed by mixing a silane coupling agent and a polymer coupling agent in a mass ratio of 1:(1.5 - 2.5).

[0016] By adopting the above technical solution, the silane coupling agent can improve the compatibility between fumed silica and norbornene dianhydride modified carbon fiber, poly(dicyclopentadiene) Parmax resin, and ultra-high molecular weight polyethylene fiber. The polymer coupling agent can improve the compatibility between the anti-aging agent and norbornene dianhydride modified carbon fiber, poly(dicyclopentadiene) Parmax resin, and ultra-high molecular weight polyethylene fiber. The combined action of the silane coupling agent and the polymer coupling agent improves the dispersibility of each component, thereby improving the wear resistance and weather resistance of the anti-aging composite engineering material.

[0017] Preferably, the silane coupling agent is methylvinyldichlorosilane.

[0018] By adopting the above technical solution, methylvinyldichlorosilane contains vinyl and Si-Cl bonds, which improves the activity of the silane coupling agent, is beneficial to improving the compatibility between fumed silica and norbornene dianhydride modified carbon fiber, poly(dicyclopentadiene) Parmax resin, and ultra-high molecular weight polyethylene fiber, further improving the wear resistance of the material, and is beneficial to improving the compatibility between the anti-aging agent and components such as poly(dicyclopentadiene) Parmax resin, and also improving the weather resistance of the material.

[0019] Preferably, the polymer coupling agent is polyethylene graft maleic anhydride.

[0020] By adopting the above technical solution, polyethylene graft maleic anhydride not only has the good processability and other excellent properties of polyethylene, but also has the re-reactivity and strong polarity of the polar molecule of maleic anhydride, improving the compatibility between the anti-aging agent and norbornene dianhydride modified carbon fiber, poly(dicyclopentadiene) Parmax resin, and ultra-high molecular weight polyethylene fiber, thereby improving the aging resistance of the material.

[0021] Preferably, the specific surface area of the fumed silica is 250 - 350m 2 / g.

[0022] By adopting the above technical solution, the large specific surface area of the fumed silica can increase the contact area between the fumed silica and components such as poly(dicyclopentadiene) Parmax resin, improve the dispersibility of the fumed silica, and thus improve the wear resistance of the material.

[0023] Preferably, the mass ratio of the antioxidant, light stabilizer, ultraviolet absorber, and light shielding agent is 1:0.7:0.5:0.2.

[0024] By adopting the above technical solution, the heat aging resistance and ultraviolet aging resistance of the material can be adjusted by controlling the mass ratio of the antioxidant, light stabilizer, ultraviolet absorber and light screening agent. When the mass ratio of the antioxidant, light stabilizer, ultraviolet absorber and light screening agent is 1:0.7:0.5:0.2, the thermal aging degradation and photoaging degradation of the poly dicyclopentadiene Parmax resin are effectively inhibited, and the aging resistance of the composite engineering material with delayed aging is relatively excellent.

[0025] Preferably, the weight average molecular weight of the ultra-high molecular weight polyethylene fiber is 3.5 million - 4.5 million.

[0026] By adopting the above technical solution, the ultra-high molecular weight polyethylene fiber has a high weight average molecular weight, which can improve the tensile strength of the material.

[0027] In a second aspect, the present application provides a preparation method of a composite engineering material with delayed aging, which is realized by adopting the following technical solution:

[0028] A preparation method of a composite engineering material with delayed aging includes the following steps:

[0029] Stir and mix poly dicyclopentadiene Parmax resin, norbornene dianhydride modified carbon fiber, ultra-high molecular weight polyethylene fiber, fumed silica, coupling agent and anti-aging additive to obtain a mixture, melt-extrude and mold the mixture, cool and pelletize to obtain a composite engineering material with delayed aging.

[0030] In summary, the present application has the following beneficial effects:

[0031] 1. In the present application, norbornene dianhydride modified carbon fiber is used to introduce norbornene dianhydride on the surface of the carbon fiber, improving the interfacial bonding force between the carbon fiber and poly dicyclopentadiene Parmax resin and ultra-high molecular weight polyethylene fiber, and improving the wear resistance of the material.

[0032] 2. In the present application, through the combined action of norbornene dianhydride modified carbon fiber and ultra-high molecular weight polyethylene fiber, the aging resistance and wear resistance of the material are improved.

[0033] 3. In the present application, a coupling agent is used to improve the compatibility between fumed silica and other components and the dispersibility of the anti-aging additive, thereby improving the wear resistance and aging resistance of the material.

[0034] 4. In the present application, it is preferably to use a compound of silane coupling agent and polymer coupling agent as the coupling agent, which improves the compatibility between the components, makes the components uniformly dispersed, and improves the wear resistance and weather resistance of the composite engineering material with delayed aging. Specific embodiments

[0035] The present application will be further described in detail below in conjunction with embodiments.

[0036] Preparation Example

[0037] Preparation Example 1 provides a norbornene dianhydride modified carbon fiber, and its preparation steps are as follows:

[0038] S1. Place 500 g of carbon fiber in 10 L of an oxidation solution formed by mixing a 10 wt% sodium chlorate aqueous solution and a 25 wt% sulfuric acid aqueous solution in a mass ratio of 1:0.8, soak at 60 °C for 24 h, take out, filter by suction, wash 5 times with deionized water, and dry to obtain carbon fiber after surface oxidation treatment;

[0039] S2. Dissolve 40 g of norbornene dianhydride in 2 kg of ethanol, then add 400 g of the carbon fiber after surface oxidation treatment obtained in step S1, stir evenly, react at 80 °C for 16 h, take out, filter by suction, wash 5 times with ethanol, and dry to obtain norbornene dianhydride modified carbon fiber.

[0040] Preparation Example 2 provides a norbornene dianhydride modified carbon fiber. The difference from Preparation Example 1 is only that: the reaction temperature in step S2 is 100 °C and the reaction time is 10 h.

[0041] Preparation Example 3 provides a norbornene dianhydride modified carbon fiber. The difference from Preparation Example 2 is only that: the mass of norbornene dianhydride is 80 g.

[0042] Preparation Example 4 provides a norbornene dianhydride modified carbon fiber. The difference from Preparation Example 2 is only that: the mass of norbornene dianhydride is 60 g.

[0043] Preparation Example 5 provides a norbornene dianhydride modified carbon fiber. The difference from Preparation Example 4 is only that: the oxidation solution is formed by mixing a 10 wt% sodium chlorate aqueous solution and a 25 wt% sulfuric acid aqueous solution in a mass ratio of 1:1.2.

[0044] Example

[0045] Example 1 provides an anti-aging composite engineering material, and its preparation steps are as follows:

[0046] Mix 5 kg of poly(dicyclopentadiene) Parmax resin, 200 g of norbornene dianhydride modified carbon fiber, 100 g of ultra-high molecular weight polyethylene fiber, 100 g of fumed silica, 50 g of aminopropylmethyldiethoxysilane, and 80 g of anti-aging agent to obtain a mixture. Add the mixture to a twin-screw extruder, melt it, and set the melting temperature as follows: the temperature of the first stage is 260 °C, the temperature of the second stage is 265 °C, the temperature of the third stage is 275 °C, the temperature of the fourth stage is 285 °C, and the temperature of the fifth stage is 295 °C. Then extrude, cool the extruded material and pelletize it to obtain an anti-aging composite engineering material;

[0047] Among them, the poly dicyclopentadiene Parmax resin is purchased from Paimai New Materials (Chengdu) Co., Ltd.;

[0048] The norbornene dianhydride modified carbon fiber is derived from Preparation Example 1;

[0049] The weight-average molecular weight of the ultra-high molecular weight polyethylene fiber is 3.5 million;

[0050] The specific surface area of the fumed silica is 250 m 2 / g;

[0051] The anti-aging agent is composed of n-octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, 2,2,6,6-tetramethyl-4-piperidyl stearate, ultraviolet absorber UV1130 and titanium dioxide mixed in a mass ratio of 1:0.6:0.4:0.2.

[0052] Example 2 provides a composite engineering material for delaying aging, which is different from Example 1 only in that: the masses of the poly dicyclopentadiene Parmax resin, the norbornene dianhydride modified carbon fiber, the ultra-high molecular weight polyethylene fiber, the fumed silica, the aminopropylmethyldiethoxysilane and the anti-aging agent are 8 kg, 300 g, 200 g, 150 g, 80 g, and 120 g respectively.

[0053] Example 3 provides a composite engineering material for delaying aging, which is different from Example 1 only in that: the masses of the poly dicyclopentadiene Parmax resin, the norbornene dianhydride modified carbon fiber, the ultra-high molecular weight polyethylene fiber, the fumed silica, the aminopropylmethyldiethoxysilane and the anti-aging agent are 6.5 kg, 280 g, 180 g, 140 g, 70 g, and 120 g respectively.

[0054] Example 4 provides a composite engineering material for delaying aging, which is different from Example 3 only in that: the anti-aging agent is composed of n-octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, 2,2,6,6-tetramethyl-4-piperidyl stearate, ultraviolet absorber UV1130 and titanium dioxide mixed in a mass ratio of 1:0.8:0.6:0.3.

[0055] Example 5 provides a composite engineering material for delaying aging, which is different from Example 3 only in that: the anti-aging agent is composed of n-octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, 2,2,6,6-tetramethyl-4-piperidyl stearate, ultraviolet absorber UV1130 and titanium dioxide mixed in a mass ratio of 1:0.7:0.5:0.2.

[0056] Examples 6 - 9 provide a composite engineering material for delaying aging, which is only different from Example 5 in that: the sources of the norbornene dianhydride modified carbon fibers are different, as shown in Table 1 specifically.

[0057] Table 1 Sources of Norbornene Dianhydride Modified Carbon Fibers in Examples 5 - 9

[0058]

[0059] Example 10 provides a composite engineering material for delaying aging, which is only different from Example 9 in that: the aminopropylmethyldiethoxysilane is replaced with polyethylene grafted maleic anhydride (brand: DuPont 41E710 of the United States) in equal mass.

[0060] Example 11 provides a composite engineering material for delaying aging, which is only different from Example 9 in that: the aminopropylmethyldiethoxysilane is replaced with a mixture of aminopropylmethyldiethoxysilane and polyethylene grafted maleic anhydride, and the mass ratio of aminopropylmethyldiethoxysilane to polyethylene grafted maleic anhydride is 1:1.5.

[0061] Example 12 provides a composite engineering material for delaying aging, which is only different from Example 11 in that: the mass ratio of aminopropylmethyldiethoxysilane to polyethylene grafted maleic anhydride is 1:2.5.

[0062] Example 13 provides a composite engineering material for delaying aging, which is only different from Example 11 in that: the aminopropylmethyldiethoxysilane is replaced with methylvinyldichlorosilane in equal mass.

[0063] Example 14 provides a composite engineering material for delaying aging, which is only different from Example 13 in that: the specific surface area of the fumed silica is 350 m 2 / g.

[0064] Example 15 provides a composite engineering material for delaying aging, which is only different from Example 14 in that: the weight - average molecular weight of the ultra - high molecular weight polyethylene fiber is 4.5 million.

[0065] Comparative Examples

[0066] Comparative Example 1 provides a composite engineering material for delaying aging, which is only different from Example 1 in that: the norbornene dianhydride modified carbon fiber is replaced with carbon fiber in equal mass.

[0067] Comparative Example 2 provides a composite engineering material for delaying aging, which is only different from Example 1 in that: the norbornene dianhydride modified carbon fiber is replaced with ultra - high molecular weight polyethylene fiber in equal mass.

[0068] Comparative Example 3 provides a composite engineering material for delaying aging, which is different from Example 1 only in that: the ultra-high molecular weight polyethylene fiber is replaced with norbornene dianhydride modified carbon fiber in equal mass.

[0069] Comparative Example 4 provides a composite engineering material for delaying aging, which is different from Example 1 only in that: aminopropylmethyldiethoxysilane is not added.

[0070] Performance detection test

[0071] For the composite engineering materials for delaying aging prepared in Examples 1-15 and Comparative Examples 1-4 of the present application, the following performance detections are carried out.

[0072] 1. Tensile strength: Referring to the provisions of GB1040-92 "Test Method for Tensile Properties of Plastics", the tensile strengths of the composite engineering materials for delaying aging prepared in Examples 1-15 and Comparative Examples 1-4 are tested respectively, and the test results are shown in Table 2.

[0073] 2. Thermal aging test: According to the provisions of GB / T 7141-1992 "Test Method for Exposure of Plastics to Hot Air", the composite engineering materials for delaying aging prepared in Examples 1-15 and Comparative Examples 1-4 are thermally aged for 8h respectively, and then the tensile strength is tested with reference to GB1040-92 "Test Method for Tensile Properties of Plastics", and the test results are shown in Table 2.

[0074] 3. UV aging performance: According to the IEC61215:2005 standard, the composite engineering materials for delaying aging prepared in Examples 1-15 and Comparative Examples 1-4 are subjected to UV aging test for 2h respectively, and then the tensile strength is tested with reference to GB1040-92 "Test Method for Tensile Properties of Plastics", and the test results are shown in Table 2.

[0075] 4. Abrasion resistance test: According to the provisions of GB / T 3960-2016 "Test Method for Sliding Friction and Wear of Plastics", the wear amounts of the composite engineering materials for delaying aging prepared in Examples 1-15 and Comparative Examples 1-4 are tested respectively. The lower the wear amount, the better the abrasion resistance. The test results are shown in Table 2.

[0076] Table 2 Test results

[0077]

[0078] The following details the present application in view of the test data in Table 2.

[0079] From the test data of Example 1 and Comparative Example 1, it can be seen that compared with carbon fiber, norbornene dianhydride modified carbon fiber reduces the wear amount of the material and improves the tensile strength after thermal aging and the tensile strength after UV aging of the material.

[0080] From the test data of Example 1 and Comparative Examples 2-3, it can be seen that the combined action of maleic anhydride modified carbon fiber and ultra-high molecular weight polyethylene fiber improves the aging resistance and wear resistance of the material.

[0081] From the test data of Example 1 and Comparative Example 4, it can be seen that the addition of aminopropylmethyldiethoxysilane improves the wear resistance and aging resistance of the material. This is because aminopropylmethyldiethoxysilane improves the compatibility between fumed silica and other components and enhances the dispersibility of anti-aging additives.

[0082] From the test data of Examples 3-5, it can be seen that the anti-aging additive in Example 5, which is a mixture of antioxidant, light stabilizer, ultraviolet absorber and light shield agent in a mass ratio of 1:0.7:0.5:0.2, has a strong inhibitory effect on the thermal aging degradation and photoaging degradation of polybicyclopentadiene Parmax resin, and improves the heat aging resistance and ultraviolet aging resistance of the composite engineering material for delaying aging.

[0083] From the test data of Examples 6-8, it can be seen that increasing the content of maleic anhydride reduces the wear amount of the composite engineering material for delaying aging and improves the wear resistance of the material; however, if the content of maleic anhydride is too high, it will reduce the tensile strength after thermal aging and the tensile strength after ultraviolet aging of the material.

[0084] From the test data of Examples 9-11, it can be seen that Example 11 uses a compound of aminopropylmethyldiethoxysilane and polyethylene grafted maleic anhydride as a coupling agent, which improves the compatibility between the components, makes the components uniformly dispersed, and improves the wear resistance and weather resistance of the composite engineering material for delaying aging.

[0085] From the test data of Examples 12-13, it can be seen that Example 12 uses aminopropylmethyldiethoxysilane, and Example 13 uses methylvinyldichlorosilane. The wear amount of the material in Example 13 is less than that in Example 12, indicating that methylvinyldichlorosilane is beneficial to improving the wear resistance of the material. The tensile strength after thermal aging and the tensile strength after ultraviolet aging of the material in Example 13 are higher, indicating that methylvinyldichlorosilane can also improve the aging resistance of the material.

[0086] From the test data of Examples 13-14, it can be seen that the fumed silica in Example 14 has a large specific surface area and good dispersibility, which improves the wear resistance of the composite engineering material for delaying aging.

[0087] From the test data of Examples 14-15, it can be seen that the ultra-high molecular weight polyethylene fiber in Example 15 has a high weight average molecular weight, which improves the tensile strength of the composite engineering material for delaying aging.

[0088] This specific embodiment is only an interpretation of the present application and does not limit the present application. After reading this specification, those skilled in the art can make modifications to this embodiment that do not contribute creatively as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A composite engineering material for delaying aging, characterized in that, By weight, the raw materials for its preparation include 500 - 800 parts of poly(dicyclopentadiene) Parmax resin, 20 - 30 parts of norbornene anhydride modified carbon fiber, 10 - 20 parts of ultra-high molecular weight polyethylene fiber, 10 - 15 parts of fumed silica, 5 - 8 parts of coupling agent, and 8 - 12 parts of anti-aging agent; the anti-aging agent is composed of antioxidant, light stabilizer, ultraviolet absorber, and light shielding agent mixed in a mass ratio of 1:(0.6 - 0.8):(0.4 - 0.6):(0.2 - 0.3).

2. The composite engineering material for delaying aging according to claim 1, characterized in that, The preparation method of the norbornene anhydride modified carbon fiber includes the following steps: S1. Immerse the carbon fiber in the oxidation solution, take it out and wash it to obtain the carbon fiber after surface oxidation treatment; S2. Dissolve norbornene anhydride in ethanol, then add the carbon fiber after surface oxidation treatment, react at 80 - 100 °C for 10 - 16 h, wash it to obtain the norbornene anhydride modified carbon fiber; The mass ratio of the norbornene anhydride, ethanol, and the carbon fiber after surface oxidation treatment is (0.1 - 0.2):5:

1.

3. A composite engineering material for delaying aging according to claim 2, characterized in that, The oxidation solution is composed of 10 wt% sodium chlorate aqueous solution and 25 wt% sulfuric acid aqueous solution mixed in a mass ratio of 1:(0.8 - 1.2).

4. A composite engineering material for delaying aging according to claim 1, characterized in that, The coupling agent is composed of silane coupling agent and polymer coupling agent mixed in a mass ratio of 1:(1.5 - 2.5).

5. A composite engineering material for delaying aging according to claim 4, characterized in that, The silane coupling agent is methylvinyldichlorosilane.

6. The composite engineering material for delaying aging according to claim 4, characterized in that, The polymer coupling agent is polyethylene grafted maleic anhydride.

7. A composite engineering material for delaying aging according to claim 1, characterized in that, The specific surface area of the fumed silica is 250 - 350 m 2 / g.

8. A composite engineering material for delaying aging according to claim 1, characterized in that, The mass ratio of the antioxidant, light stabilizer, ultraviolet absorber, and light shielding agent is 1:0.7:0.5:0.

2.

9. A composite engineering material for delaying aging according to any one of claims 1-8, characterized in that, The weight-average molecular weight of the ultra-high molecular weight polyethylene fiber is 3.5 million - 4.5 million.

10. A method for preparing the anti-aging composite engineering material according to any one of claims 1-9, characterized in that, Including the following steps: Stir and mix the poly(dicyclopentadiene) Parmax resin, norbornene anhydride modified carbon fiber, ultra-high molecular weight polyethylene fiber, fumed silica, coupling agent, and anti-aging agent to obtain a mixture, melt-extrude and mold the mixture, cool and pelletize it to obtain the anti-aging composite engineering material.

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