New carbon fiber surface treatment method

A surface treatment, carbon fiber technology, applied in fiber treatment, carbon fiber, textiles and papermaking, etc., can solve the problems of low reactivity, low surface energy, poor matrix adhesion, etc., to improve mechanical properties and mechanical properties, reduce manufacturing costs , the preparation method is simple

Inactive Publication Date: 2016-10-19
洛阳新巨能高热技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high inertia of the carbon fiber surface, low surface energy, lack of chemically active functional groups, low reactivity, poor adhesion to the matrix, and many defects at the interface, it directly affects the mechanical properties of the composite material and limits the high performance of the carbon fiber. play

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Shred the carbon fiber to make it 40mm in length, then soak the carbon fiber in acetone solution for 15 hours, take out the carbon fiber and wash it with distilled water three times, and then dry it at 50°C; put the dried carbon fiber at 380°C in oxygen Oxidation treatment was carried out in the atmosphere for 10 minutes; then the carbon fiber after the oxidation treatment was placed in a 0.5% by weight ammonium phosphate solution, so that the weight percent of the carbon fiber in the ammonium phosphate solution was 1.5%, treated with ultrasonic waves at room temperature for 20 minutes, and the ultrasonic The frequency is 60Hz; finally filtered, washed with distilled water, and dried.

[0034] The surface-treated carbon fiber and acrylic resin were used to prepare a composite material, and the interlaminar shear strength was 110.5MPa.

Embodiment 2

[0036] Shred the carbon fibers to make them 50 mm in length, then soak the carbon fibers in acetone solution for 15 hours, take out the carbon fibers and wash them three times with distilled water, and then dry them at 50°C; place the dried carbon fibers at 380°C in oxygen Oxidation treatment was carried out in the atmosphere for 10 minutes; then the carbon fiber after the oxidation treatment was placed in a 0.7% ammonium phosphate solution by weight, so that the weight percent of the carbon fiber in the ammonium phosphate solution was 2.0%, treated with ultrasonic waves at room temperature for 20 minutes, and the ultrasonic The frequency is 60Hz; finally filtered, washed with distilled water, and dried.

[0037] The surface-treated carbon fiber and acrylic resin were used to prepare a composite material, and the interlaminar shear strength was 119.6MPa.

Embodiment 3

[0039] Shred the carbon fibers to make them 50 mm in length, then soak the carbon fibers in acetone solution for 15 hours, take out the carbon fibers and wash them three times with distilled water, and then dry them at 50°C; place the dried carbon fibers at 380°C in oxygen Oxidation treatment was carried out in the atmosphere for 10 minutes; then the carbon fiber after the oxidation treatment was placed in an ammonium phosphate solution with a weight percentage of 1.0%, so that the weight percentage of the carbon fiber in the ammonium phosphate solution was 3.0%, treated with ultrasonic waves at room temperature for 20 min, and the ultrasonic The frequency is 70Hz; finally filtered, washed with distilled water, and dried.

[0040] The surface-treated carbon fiber and acrylic resin were used to prepare a composite material, and the interlaminar shear strength was 126.4MPa.

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Abstract

The invention relates to a new carbon fiber surface treatment method. Carbon fibers are subjected to oxidation treatment in an oxygen atmosphere, and then the carbon fibers obtained after oxidation treatment are subjected to surface treatment with an ammonium phosphate solution; the interlaminar shear strength of a composite prepared from the carbon fibers obtained after surface treatment and acrylic resin reaches up to 110.5-132.7 MPa, the bonding performance of the carbon fibers and the resin matrix material is greatly improved, and the mechanical performance of the carbon fibers is further improved. Raw materials are easy to obtain, and the preparation method is simple, meets the demand of industrial development and has quite high practicability.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a new method for surface treatment of carbon fibers. Background technique [0002] Due to the advantages of low density, high specific strength, high specific modulus, and small thermal expansion coefficient, carbon fiber reinforced resin matrix composites have been widely used in spacecraft structures. Carbon fiber is a reinforcement and is the main load-bearing structure; the resin matrix plays the role of connecting fibers and transmitting loads, can transmit and bear shear stress, bear tensile and compressive loads perpendicular to fibers, and protect fibers from damage and corrosion. [0003] The performance of composite materials not only depends on its component materials, but also largely depends on the quality of the interface between the components. The interface of composite materials is the intermediate phase between the reinforcement phase and the matrix phase, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/34D06M11/71C08L33/00C08K9/02C08K7/06D06M101/40
Inventor 高学昆郭帅丁超
Owner 洛阳新巨能高热技术有限公司
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