Carbon nano-tube connecting carbon fiber multi-scale reinforcing body and method for producing the same

A carbon nanotube and carbon fiber technology, applied in the field of carbon fiber reinforcement and its preparation, can solve the problems of increased interface rigidity, decreased material toughness, unable to improve the performance of fiber resin matrix, etc., achieves less interface defects, improved performance, and promotes popularization and use. Effect

Inactive Publication Date: 2008-05-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the defects that the existing carbon fiber processing method increases the interface rigidity, reduces the material toughness and cannot improve the performance of the resin matrix between the fibers and between the carbon fiber laminates, and provides a carbon nanotube connection Carbon fiber multi-scale reinforcement and its preparation method

Method used

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  • Carbon nano-tube connecting carbon fiber multi-scale reinforcing body and method for producing the same

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specific Embodiment approach 1

[0012] Specific Embodiment 1: This embodiment is described in conjunction with FIG. 1. In this embodiment, the carbon nanotube-connected carbon fiber multi-scale reinforcement is composed of 2 to 6 parts by weight of carbon nanotubes 1 and 100 modified by 1,6 hexamethylenediamine. carbon fiber 2 with acid chloride functional groups on the surface; the carbon nanotube 1 is connected to the surface of the carbon fiber 2 through a chemical bond.

[0013] In this embodiment, the carbon nanotubes modified by 1,6 hexamethylenediamine are made according to the following steps: 1. Pretreatment of carbon nanotubes: putting the carbon nanotubes into a mixed solution of sulfuric acid and nitric acid for 1s pulse ultrasonic treatment for 8-12min , and then reflux at 95-105°C for 4±0.1h, then filter and wash the solid phase until neutral, then dry and grind; 2. Put the pretreated carbon nanotubes into SOCl 2 Medium 1s pulse ultrasonic treatment for 8-12min, then add N,N-dimethylformamide a...

specific Embodiment approach 2

[0016] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the carbon nanotube-connected carbon fiber multi-scale reinforcement consists of 3 to 5 parts by weight of carbon nanotubes modified by 1,6 hexamethylenediamine and 100 carbon fibers with acid chloride functional groups on the surface are combined. Others are the same as the first embodiment.

specific Embodiment approach 3

[0017] Specific embodiment three: The difference between this embodiment and specific embodiment one is: the carbon nanotubes connected carbon fiber multi-scale reinforcement is composed of 4 parts by weight of carbon nanotubes modified by 1,6 hexamethylenediamine and 100 parts It is made by combining carbon fibers with acid chloride functional groups on the surface. Others are the same as the first embodiment.

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Abstract

The invention discloses a multi-scale reinforcement body that carbon nano-tube is connected with carbon fiber and a preparation method aiming at solving the drawbacks of increasing rigidity at the interface, lowering toughness of material and not improving performance of resin base between the fibers and between carbon fiber plywoods after prior carbon fiber treatment is made. The multi-scale reinforcement body of carbon nano-tube connecting carbon fiber is made through combining between a carbon nano-tube decorated by 1, 6 hexamethylenediamine and carbon fiber with acyl chloride functional group on the surface. The preparation method comprises: the carbon nano-tube decorated by 1, 6 hexamethylenediamine and the carbon fiber with acyl chloride functional group on the surface are prepared before put into N,N-dimethylformamide for reaction, thereby getting the multi-scale reinforcement body of carbon nano-tube connecting carbon fiber. The invention has the advantages of big activity on the surface, a plurality of chemical activated functional groups, strong reactive activity, good cohesiveness with the base, improving shearing intensity at the interface for composite material by 127.5% to 144.7% and improving toughness for the base by 34.43% to 48.67%.

Description

technical field [0001] The invention relates to a carbon fiber reinforced body and a preparation method thereof. Background technique [0002] Carbon fiber has a series of excellent properties such as high specific strength, high specific modulus, fatigue resistance, creep resistance and small thermal expansion coefficient, making it one of the most important reinforcement materials in recent years and widely used in many fields. Among them, carbon fiber / epoxy resin composite material is the main form of its application. Carbon fiber / epoxy resin composite material has a series of excellent properties such as high strength, high modulus, low density, and stable size. It has been widely used in aerospace and military industries. and sports equipment. However, due to the high inertia of the carbon fiber surface, low surface energy, few chemically active functional groups, low reactivity, and poor adhesion to the matrix, there are many defects in the interface of the composite ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F11/16D06M11/73
Inventor 赫晓东王荣国张福华刘文博李海燕
Owner HARBIN INST OF TECH
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