A kind of carbon fiber surface modification method

A surface modification, carbon fiber technology, used in carbon fiber, fiber processing, textiles and papermaking, etc., can solve the application limitations of composite materials, and achieve the effect of improving interlaminar shear strength, improving bonding performance, and improving bonding performance.

Active Publication Date: 2021-12-31
迈爱德科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the coating method currently mainly uses polymers or coupling agents, the application of composite materials in the high temperature field is limited.

Method used

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  • A kind of carbon fiber surface modification method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A carbon fiber surface modification method, comprising the following steps:

[0029] Step 1: Mix nano-titanium powder with a diameter of 10nm, nano-aluminum powder with a diameter of 10nm, sodium chloride, potassium chloride, and phenolic resin in a certain mass ratio; 45 parts of nano-titanium powder, 25 parts of nano-aluminum powder, chlorine 25 parts of sodium chloride, 15 parts of potassium chloride, and 5 parts of phenolic resin.

[0030] Step 2: Embedding carbon fibers with a diameter of 5-10 microns in the above mixed powder;

[0031] Step 3: Place the embedding in Step 2 in a tube furnace, carbonize under the protection of nitrogen, the carbonization temperature is 900°C, the time is 60 minutes, and then cool naturally;

[0032] Step 4: Clean the carbon fiber obtained in Step 3 with deionized water, and vacuum-dry at 80°C for 6 hours;

[0033] Step 5: Soak the carbon fiber obtained in Step 4 with a mixed solution of 10% lithium fluoride and 10% hydrochloric ac...

Embodiment 2

[0035] A carbon fiber surface modification method, comprising the following steps:

[0036] Step 1: Mix nano-titanium powder with a diameter of 800nm, nano-aluminum powder with a diameter of 800nm, sodium chloride, potassium chloride, and phenolic resin in a certain mass ratio; 50 parts of nano-titanium powder, 30 parts of nano-aluminum powder, chlorine 30 parts of sodium chloride, 20 parts of potassium chloride, and 10 parts of phenolic resin.

[0037] Step 2: Embedding carbon fibers with a diameter of 5-10 microns in the above mixed powder;

[0038] Step 3: Place the embedding in Step 2 in a tube furnace, carbonize under the protection of nitrogen, the carbonization temperature is 900°C, the time is 60 minutes, and then cool naturally;

[0039] Step 4: Clean the carbon fiber obtained in Step 3 with deionized water, and vacuum-dry at 80°C for 6 hours;

[0040] Step 5: Soak the carbon fiber obtained in Step 4 with a mixed solution of 10% lithium fluoride and 10% hydrochloric...

Embodiment 3

[0042] A carbon fiber surface modification method, comprising the following steps:

[0043] Step 1: Mix nano-titanium powder with a diameter of 200nm, nano-aluminum powder with a diameter of 200nm, sodium chloride, potassium chloride, and phenolic resin in a certain mass ratio; 45 parts of nano-titanium powder, 25 parts of nano-aluminum powder, chlorine 25 parts of sodium chloride, 15 parts of potassium chloride, and 5 parts of phenolic resin.

[0044] Step 2: Embedding carbon fibers with a diameter of 5-10 microns in the above mixed powder;

[0045] Step 3: Place the embedding in Step 2 in a tube furnace, carbonize under the protection of nitrogen, the carbonization temperature is 900°C, the time is 60 minutes, and then cool naturally;

[0046] Step 4: Clean the carbon fiber obtained in Step 3 with deionized water, and vacuum-dry at 80°C for 6 hours;

[0047] Step 5: Soak the carbon fiber obtained in Step 4 with a mixed solution of 10% lithium fluoride and 10% hydrochloric ...

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Abstract

The invention discloses a carbon fiber surface modification method, comprising the following steps: (1) mixing nano-titanium powder, nano-aluminum powder, sodium chloride, potassium chloride, and phenolic resin; (2) embedding carbon fiber in the above-mentioned mixed powder (3) Place the embedding in step (2) in a tube furnace, carbonize under the protection of an inert atmosphere, and then cool naturally; (4) Clean the carbon fiber obtained in step (3) with deionized water, and vacuum dry drying; (5) soaking the carbon fiber obtained in step (4) with a mixed solution of lithium fluoride and hydrochloric acid, and then washing with deionized water to obtain a modified carbon fiber. The carbon fiber modification technology provided by the invention obviously improves the bonding performance of the fiber and the matrix, and has a very good reinforcing effect. Compared with the polymer or coupling agent coating method, the applicable temperature is greatly increased, and the maximum applicable temperature is 900°C. At the same time, the interlaminar shear strength of the composite was increased by 20‑30%.

Description

technical field [0001] The invention belongs to the field of material modification, and in particular relates to a carbon fiber surface modification method. Background technique [0002] Since the 1960s, carbon fiber has been developed as one of the most important industrial materials in modern science and technology. Because of its excellent properties such as high specific strength and modulus, low density and thermal expansion, heat resistance, and chemical stability, carbon fiber reinforced plastics (CFRP) are currently widely used in aviation, aerospace, sporting goods, new energy and other industries. [0003] The interface between the carbon fiber and the matrix, which plays a role in transmitting loads in the composite, determines the final performance of CFRP. However, due to the smooth surface and low surface energy of carbon fiber, it is difficult to mechanically fit and chemically bond with the resin matrix with good performance. Therefore, it is necessary to m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/74D06M11/13D06M101/40
CPCD06M11/74D06M11/13D06M2101/40
Inventor 赵伟仪修杰位登虎
Owner 迈爱德科技(上海)有限公司
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