Carbon fiber composite material, method of manufacture and carbon fiber profile
By adding graphene oxide and attapulgite to carbon fiber composites, combined with ultraviolet and high-temperature treatment, the problem of easy scratching of carbon fiber profiles was solved, achieving high self-healing ability and high fracture toughness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ANHUI RONGQI SECURITY TECH CO LTD
- Filing Date
- 2024-07-02
- Publication Date
- 2026-07-10
AI Technical Summary
Carbon fiber profiles are easily scratched during application, resulting in insufficient self-healing ability.
By adding graphene oxide and attapulgite to carbon fiber composites, the graphene oxide is embedded in the porous channels of attapulgite to promote the self-healing of the material when scratched. Combined with ultraviolet irradiation and high-temperature treatment, a carbon fiber composite material with self-healing ability was prepared.
The carbon fiber material exhibits good self-healing ability under fine scratches, with a fracture toughness of over 265 J/m2 and a 3-day self-healing rate of over 60%.
Smart Images
Figure BDA0004922825500000061
Abstract
Description
Technical Field
[0001] This application relates to the field of carbon fiber composite materials technology, and in particular to a carbon fiber composite material, a preparation method thereof, and a carbon fiber profile. Background Technology
[0002] Carbon fiber is widely used in various fields due to its high specific strength and specific modulus, light weight, and corrosion resistance; among them, carbon fiber profiles are a relatively common application area.
[0003] However, due to the various application scenarios of the profiles, carbon fiber panels are frequently scratched, affecting their use in profiles. Therefore, it is necessary to research a carbon fiber material that can achieve better self-healing capabilities even with fine scratches. Summary of the Invention
[0004] In order to solve at least one of the above-mentioned technical problems and to develop a carbon fiber material that can achieve good self-healing ability under fine scratches, this application provides a carbon fiber composite material, a preparation method, and a carbon fiber profile.
[0005] On the one hand, the carbon fiber composite material provided in this application is prepared from the following components in parts by weight:
[0006] 100 parts bamboo pulp fiber;
[0007] 0.2–1.5 parts of graphene oxide;
[0008] Attapulgite 1.5–2.8 parts;
[0009] 0.35 to 0.6 parts of coupling agent.
[0010] Optionally, the weight ratio of graphene oxide to attapulgite is 1:(2-2.75).
[0011] Optionally, the particle size of the attapulgite soil is 0.2 to 1 μm.
[0012] Optional, graphene oxide: diameter 0.01μm~15μm, thickness 0.55nm~3.85nm.
[0013] Optionally, the coupling agent is one or more combinations of silane coupling agents KH550 and KH560.
[0014] Secondly, this application also provides a method for preparing the above-mentioned carbon fiber composite material, comprising the following steps:
[0015] S1. Add bamboo pulp fibers to water and stir evenly to form a suspension;
[0016] S2. Add graphene oxide, attapulgite, and coupling agent to the suspension in S1, stir evenly, and then age at room temperature to obtain a solid mixture.
[0017] S3. The solid mixture prepared in S2 is dehydrated and then subjected to ultraviolet irradiation to obtain cross-linked fiber material;
[0018] S4. The cross-linked fiber material prepared in S3 is pre-oxidized at 200-300℃; then, in a protective gas atmosphere, it is heated to 1000-2000℃ for carbonization treatment to obtain carbon fiber composite material.
[0019] Optionally, in step S3, the ultraviolet irradiation time is 10 to 15 minutes.
[0020] Optionally, in step S4, the carbonization process takes 30 to 75 minutes.
[0021] Thirdly, this application also provides a carbon fiber profile prepared from the above-mentioned carbon fiber composite material.
[0022] In summary, this invention endows carbon fiber composites with a certain degree of self-healing ability by adding graphene oxide to carbon fibers. Furthermore, by adding attapulgite and selecting appropriate sizes for both the attapulgite and graphene oxide, the graphene oxide is partially embedded within the porous channels of the attapulgite. This allows the graphene oxide to be evenly distributed within the carbon fiber composite material through the attapulgite, while also facilitating electron movement through the porous channels of the attapulgite. When the carbon fiber composite material is scratched, the adjacent graphene oxide moves the attapulgite and carbon fibers, enabling the scratch to self-heal. Detailed Implementation
[0023] The present application will be further described in detail below with reference to the embodiments.
[0024] Unless otherwise specified, the main components involved in the following embodiments of this application are all purchased from commercially available products.
[0025] Graphene oxide: number of layers <10, >99% wt; purchased from Shenzhen Turing Evolution Technology Co., Ltd.
[0026] Coupling agent: In the following embodiments of this application, silane coupling agent KH550 is used as an example. Specific Implementation
[0028] Example 1
[0029] This embodiment is used to prepare a carbon fiber composite material, and the preparation method is as follows:
[0030] Add 1 kg of bamboo pulp fiber to water and stir until a suspension is formed;
[0031] 2g of graphene oxide, 28g of attapulgite and 3.5g of coupling agent were added to the prepared suspension and stirred evenly. Then, the suspension was aged at room temperature to obtain a solid mixture.
[0032] The prepared solid mixture was dehydrated and then irradiated with ultraviolet light for 10 minutes to obtain cross-linked fiber material;
[0033] The prepared cross-linked fiber material was pre-oxidized at 200℃; then, in a nitrogen atmosphere, it was heated to 1500℃ for 45 minutes to obtain carbon fiber composite material.
[0034] Example 2
[0035] This embodiment is used to prepare a carbon fiber composite material, and the preparation method is as follows:
[0036] Add 1 kg of bamboo pulp fiber to water and stir until a suspension is formed;
[0037] 5g of graphene oxide, 25g of attapulgite and 4g of coupling agent were added to the prepared suspension and stirred evenly. Then, the suspension was aged at room temperature to obtain a solid mixture.
[0038] The prepared solid mixture was dehydrated and then irradiated with ultraviolet light for 10 minutes to obtain cross-linked fiber material;
[0039] The prepared cross-linked fiber material was pre-oxidized at 200℃; then, in a nitrogen atmosphere, it was heated to 1500℃ for 45 minutes to obtain carbon fiber composite material.
[0040] Example 3
[0041] This embodiment is used to prepare a carbon fiber composite material, and the preparation method is as follows:
[0042] Add 1 kg of bamboo pulp fiber to water and stir until a suspension is formed;
[0043] 8g of graphene oxide, 22g of attapulgite and 4.5g of coupling agent were added to the prepared suspension and stirred evenly. Then, the suspension was aged at room temperature to obtain a solid mixture.
[0044] The prepared solid mixture was dehydrated and then irradiated with ultraviolet light for 10 minutes to obtain cross-linked fiber material;
[0045] The prepared cross-linked fiber material was pre-oxidized at 200℃; then, in a nitrogen atmosphere, it was heated to 1500℃ for 45 minutes to obtain carbon fiber composite material.
[0046] Example 4
[0047] This embodiment is used to prepare a carbon fiber composite material, and the preparation method is as follows:
[0048] Add 1 kg of bamboo pulp fiber to water and stir until a suspension is formed;
[0049] 10g of graphene oxide, 20g of attapulgite and 5g of coupling agent were added to the prepared suspension and stirred evenly. Then, the suspension was aged at room temperature to obtain a solid mixture.
[0050] The prepared solid mixture was dehydrated and then irradiated with ultraviolet light for 10 minutes to obtain cross-linked fiber material;
[0051] The prepared cross-linked fiber material was pre-oxidized at 200℃; then, in a nitrogen atmosphere, it was heated to 1500℃ for 45 minutes to obtain carbon fiber composite material.
[0052] Example 5
[0053] This embodiment is used to prepare a carbon fiber composite material, and the preparation method is as follows:
[0054] Add 1 kg of bamboo pulp fiber to water and stir until a suspension is formed;
[0055] 12g of graphene oxide, 18g of attapulgite and 5.5g of coupling agent were added to the prepared suspension and stirred evenly. Then, the suspension was aged at room temperature to obtain a solid mixture.
[0056] The prepared solid mixture was dehydrated and then irradiated with ultraviolet light for 10 minutes to obtain cross-linked fiber material;
[0057] The prepared cross-linked fiber material was pre-oxidized at 200℃; then, in a nitrogen atmosphere, it was heated to 1500℃ for 45 minutes to obtain carbon fiber composite material.
[0058] Example 6
[0059] This embodiment is used to prepare a carbon fiber composite material, and the preparation method is as follows:
[0060] Add 1 kg of bamboo pulp fiber to water and stir until a suspension is formed;
[0061] 15g of graphene oxide, 15g of attapulgite and 6g of coupling agent were added to the prepared suspension and stirred evenly. Then, the suspension was aged at room temperature to obtain a solid mixture.
[0062] The prepared solid mixture was dehydrated and then irradiated with ultraviolet light for 10 minutes to obtain cross-linked fiber material;
[0063] The prepared cross-linked fiber material was pre-oxidized at 200℃; then, in a nitrogen atmosphere, it was heated to 1500℃ for 45 minutes to obtain carbon fiber composite material.
[0064] Fracture toughness tests were conducted on Examples 1 to 6 above using a double cantilever beam (DCB) test, and the specific results are shown in Table 1.
[0065] Using a scratching needle with a steel ball tip of 0.5mm, a force of 1N perpendicular to the surface of the composite material is applied to create a scratch with an initial length of 10mm. After 3 days, the remaining length of the scratch is observed.
[0066]
[0067] Table 1
[0068] Composite materials weight ratio <![CDATA[Fracture toughness (J / m 2 )]]> Scratch width / mm 3-day healing rate / % Example 1 14.00 265 0.5 65 Example 2 5.00 273 0.5 72 Example 3 2.75 292 0.5 85 Example 4 2.00 301 0.5 84 Example 5 1.50 284 0.5 75 Example 6 1.00 287 0.5 78
[0069] As shown in Examples 1-6 and Table 1, the fracture toughness of the composite material prepared by the technical solution of this application can reach 265 J / m. 2 Furthermore, it possesses a certain degree of self-healing ability even when the surface has fine scratches (0.5mm); the self-healing rate can reach over 60% in 3 days.
[0070] Furthermore, the inventors found that the data from Examples 3 and 4 were significantly superior to those from other examples. Therefore, the inventors preliminarily determined that the carbon fiber composite material prepared with a weight ratio of graphene oxide to attapulgite of 1:(2 to 2.75) exhibits better fracture toughness and self-healing ability.
[0071] Furthermore, the inventors provided Examples 7 to 15 to further verify this.
[0072] Example 7
[0073] The difference between this embodiment and Embodiment 3 is that the amount of attapulgite added in this embodiment is 28g. The specific preparation method is as follows:
[0074] Add 1 kg of bamboo pulp fiber to water and stir until a suspension is formed;
[0075] 8g of graphene oxide, 22g of attapulgite and 4.5g of coupling agent were added to the prepared suspension and stirred evenly. Then, the suspension was aged at room temperature to obtain a solid mixture.
[0076] The prepared solid mixture was dehydrated and then irradiated with ultraviolet light for 10 minutes to obtain cross-linked fiber material;
[0077] The prepared cross-linked fiber material was pre-oxidized at 200℃; then, in a nitrogen atmosphere, it was heated to 1500℃ for 45 minutes to obtain carbon fiber composite material.
[0078] Example 8
[0079] The difference between this embodiment and Embodiment 3 is that the amount of attapulgite added in this embodiment is 25g. The specific preparation method is as follows:
[0080] Add 1 kg of bamboo pulp fiber to water and stir until a suspension is formed;
[0081] 8g of graphene oxide, 25g of attapulgite and 4.5g of coupling agent were added to the prepared suspension and stirred evenly. Then, the suspension was aged at room temperature to obtain a solid mixture.
[0082] The prepared solid mixture was dehydrated and then irradiated with ultraviolet light for 10 minutes to obtain cross-linked fiber material;
[0083] The prepared cross-linked fiber material was pre-oxidized at 200℃; then, in a nitrogen atmosphere, it was heated to 1500℃ for 45 minutes to obtain carbon fiber composite material.
[0084] Example 9
[0085] The difference between this embodiment and Embodiment 3 is that the amount of attapulgite added in this embodiment is 20g. The specific preparation method is as follows:
[0086] Add 1 kg of bamboo pulp fiber to water and stir until a suspension is formed;
[0087] 8g of graphene oxide, 20g of attapulgite and 4.5g of coupling agent were added to the prepared suspension and stirred evenly. Then, the suspension was aged at room temperature to obtain a solid mixture.
[0088] The prepared solid mixture was dehydrated and then irradiated with ultraviolet light for 10 minutes to obtain cross-linked fiber material;
[0089] The prepared cross-linked fiber material was pre-oxidized at 200℃; then, in a nitrogen atmosphere, it was heated to 1500℃ for 45 minutes to obtain carbon fiber composite material.
[0090] Example 10
[0091] The difference between this embodiment and Embodiment 3 is that the amount of attapulgite added in this embodiment is 18g. The specific preparation method is as follows:
[0092] Add 1 kg of bamboo pulp fiber to water and stir until a suspension is formed;
[0093] 8g of graphene oxide, 18g of attapulgite and 4.5g of coupling agent were added to the prepared suspension and stirred evenly. Then, the suspension was aged at room temperature to obtain a solid mixture.
[0094] The prepared solid mixture was dehydrated and then irradiated with ultraviolet light for 10 minutes to obtain cross-linked fiber material;
[0095] The prepared cross-linked fiber material was pre-oxidized at 200℃; then, in a nitrogen atmosphere, it was heated to 1500℃ for 45 minutes to obtain carbon fiber composite material.
[0096] Example 11
[0097] The difference between this embodiment and Embodiment 3 is that the amount of attapulgite added in this embodiment is 15g. The specific preparation method is as follows:
[0098] Add 1 kg of bamboo pulp fiber to water and stir until a suspension is formed;
[0099] 8g of graphene oxide, 15g of attapulgite and 4.5g of coupling agent were added to the prepared suspension and stirred evenly. Then, the suspension was aged at room temperature to obtain a solid mixture.
[0100] The prepared solid mixture was dehydrated and then irradiated with ultraviolet light for 10 minutes to obtain cross-linked fiber material;
[0101] The prepared cross-linked fiber material was pre-oxidized at 200℃; then, in a nitrogen atmosphere, it was heated to 1500℃ for 45 minutes to obtain carbon fiber composite material.
[0102] The carbon fiber composite materials prepared in Examples 7 to 11 were tested, and the results are shown in Table 2.
[0103] Table 2
[0104] Composite materials weight ratio <![CDATA[Fracture toughness (J / m 2 )]]> Scratch width / mm 3-day healing rate / % Example 7 3.50 269 0.5 71 Example 8 3.13 272 0.5 76 Example 3 2.75 292 0.5 85 Example 9 2.50 304 0.5 87 Example 10 2.25 308 0.5 81 Example 11 1.88 291 0.5 74
[0105] As verified by Examples 3, 7-11, and Table 2, based on Example 3, by adjusting the amount of attapulgite added to make the weight ratio of graphene oxide to attapulgite fall within the range of 1:(2-2.75), the carbon fiber composite materials prepared in Examples 3, 9, and 10 exhibit better fracture toughness and self-healing ability compared to other examples, with a fracture toughness reaching 300 J / m. 2 Furthermore, the 3D self-healing rate can reach over 80%.
[0106] Example 12
[0107] The difference between this embodiment and Embodiment 4 is that the amount of attapulgite added in this embodiment is 28g. The specific preparation method is as follows:
[0108] Add 1 kg of bamboo pulp fiber to water and stir until a suspension is formed;
[0109] 10g of graphene oxide, 28g of attapulgite and 5g of coupling agent were added to the prepared suspension and stirred evenly. Then, the suspension was aged at room temperature to obtain a solid mixture.
[0110] The prepared solid mixture was dehydrated and then irradiated with ultraviolet light for 10 minutes to obtain cross-linked fiber material;
[0111] The prepared cross-linked fiber material was pre-oxidized at 200℃; then, in a nitrogen atmosphere, it was heated to 1500℃ for 45 minutes to obtain carbon fiber composite material.
[0112] Example 13
[0113] The difference between this embodiment and Embodiment 4 is that the amount of attapulgite added in this embodiment is 25g. The specific preparation method is as follows:
[0114] Add 1 kg of bamboo pulp fiber to water and stir until a suspension is formed;
[0115] 10g of graphene oxide, 25g of attapulgite and 5g of coupling agent were added to the prepared suspension and stirred evenly. Then, the suspension was aged at room temperature to obtain a solid mixture.
[0116] The prepared solid mixture was dehydrated and then irradiated with ultraviolet light for 10 minutes to obtain cross-linked fiber material;
[0117] The prepared cross-linked fiber material was pre-oxidized at 200℃; then, in a nitrogen atmosphere, it was heated to 1500℃ for 45 minutes to obtain carbon fiber composite material.
[0118] Example 14
[0119] The difference between this embodiment and Embodiment 4 is that the amount of attapulgite added in this embodiment is 22g. The specific preparation method is as follows:
[0120] Add 1 kg of bamboo pulp fiber to water and stir until a suspension is formed;
[0121] 10g of graphene oxide, 22g of attapulgite and 5g of coupling agent were added to the prepared suspension and stirred evenly. Then, the suspension was aged at room temperature to obtain a solid mixture.
[0122] The prepared solid mixture was dehydrated and then irradiated with ultraviolet light for 10 minutes to obtain cross-linked fiber material;
[0123] The prepared cross-linked fiber material was pre-oxidized at 200℃; then, in a nitrogen atmosphere, it was heated to 1500℃ for 45 minutes to obtain carbon fiber composite material.
[0124] Example 15
[0125] The difference between this embodiment and Embodiment 4 is that the amount of attapulgite added in this embodiment is 18g. The specific preparation method is as follows:
[0126] Add 1 kg of bamboo pulp fiber to water and stir until a suspension is formed;
[0127] 10g of graphene oxide, 18g of attapulgite and 5g of coupling agent were added to the prepared suspension and stirred evenly. Then, the suspension was aged at room temperature to obtain a solid mixture.
[0128] The prepared solid mixture was dehydrated and then irradiated with ultraviolet light for 10 minutes to obtain cross-linked fiber material;
[0129] The prepared cross-linked fiber material was pre-oxidized at 200℃; then, in a nitrogen atmosphere, it was heated to 1500℃ for 45 minutes to obtain carbon fiber composite material.
[0130] The carbon fiber composite materials prepared in Examples 12-15 were tested, and the results are shown in Table 3.
[0131] Table 3
[0132] Composite materials weight ratio <![CDATA[Fracture toughness (J / m 2 )]]> Scratch width / mm 3-day healing rate / % Example 12 2.80 264 0.5 67 Example 13 2.50 291 0.5 80 Example 14 2.20 295 0.5 82 Example 4 2.00 301 0.5 84 Example 15 1.80 288 0.5 73
[0133] As verified by Examples 4, 12-15, and Table 3, based on Example 4, by adjusting the amount of attapulgite added to make the weight ratio of graphene oxide to attapulgite fall within the range of 1:(2-2.75), the carbon fiber composite materials prepared in Examples 4, 13, and 14 exhibit better fracture toughness and self-healing ability compared to other examples, with a fracture toughness reaching 300 J / m. 2 Furthermore, the 3D self-healing rate can reach over 80%.
[0134] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A carbon fiber composite material, characterized in that, It is prepared from the following components in parts by weight: 100 parts bamboo pulp fiber; 0.2 to 1.5 parts of graphene oxide; the graphene oxide has a diameter of 0.01 μm to 15 μm and a thickness of 0.55 nm to 3.85 nm; 1.5 to 2.8 parts of attapulgite; the particle size of the attapulgite is 0.2 to 1 μm; 0.35~0.6 parts of coupling agent; the coupling agent is one or more combinations of silane coupling agents KH550 and KH560; The method for preparing the carbon fiber composite material includes the following steps: S1. Add bamboo pulp fibers to water and stir evenly to form a suspension; S2. Add graphene oxide, attapulgite, and coupling agent to the suspension in S1, stir evenly, and then age at room temperature to obtain a solid mixture. S3. The solid mixture prepared in S2 is dehydrated and then subjected to ultraviolet irradiation to obtain cross-linked fiber material; S4. The cross-linked fiber material prepared in S3 is pre-oxidized at 200~300℃; then, in a protective gas atmosphere, it is heated to 1000~2000℃ for carbonization treatment to obtain carbon fiber composite material.
2. The carbon fiber composite material according to claim 1, characterized in that, The weight ratio of graphene oxide to attapulgite is 1:(2~2.75).
3. The carbon fiber composite material according to claim 1, characterized in that, In step S3, the ultraviolet irradiation time is 10-15 minutes.
4. The carbon fiber composite material according to claim 1, characterized in that, In step S4, the carbonization process takes 30 to 75 minutes.
5. A carbon fiber profile, prepared from the carbon fiber composite material according to claim 1.