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Method for green grafting of polyether amine on carbon fiber surface

A technology of carbon fiber and polyetheramine, which is applied in the field of carbon fiber surface grafting, can solve the problems of loss of carbon fiber body strength and low bonding strength of carbon fiber composite material interface, and achieve the effect of improving interface performance, easy operation, and simple steps

Active Publication Date: 2017-09-08
青岛碳智新材料科技有限公司
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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 problems of large loss of carbon fiber body strength and low interfacial bonding strength of carbon fiber composite materials in the existing method of carbon fiber surface modification, and to provide a method for green grafting of polyetheramine on the surface of carbon fiber

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  • Method for green grafting of polyether amine on carbon fiber surface
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  • Method for green grafting of polyether amine on carbon fiber surface

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specific Embodiment approach 1

[0039] Specific embodiment one: This embodiment is a method of green grafting polyether amine on the surface of carbon fiber, which is completed according to the following steps:

[0040] 1. Cleaning:

[0041] ① Put the carbon fiber into a Soxhlet extractor filled with acetone, and use acetone to clean and remove impurities on the surface of the carbon fiber at a temperature of 75°C to 85°C. The cleaning time is 2h to 8h, and the cleaned carbon fiber is taken out. Obtain the carbon fiber after cleaning with acetone;

[0042] ②. Place the carbon fiber cleaned with acetone obtained in step ① into a supercritical device, and soak it in a supercritical acetone-water system with a temperature of 350°C to 370°C and a pressure of 8MPa to 14MPa for 20min to 30min to obtain ring removal Carbon fiber after oxygen coating;

[0043] The volume ratio of acetone and water in the supercritical acetone-water system described in step 2. is 5:1;

[0044] ③. Place the carbon fibers obtained i...

specific Embodiment approach 2

[0065] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the volume ratio of the mass of N,N'-dicyclohexylcarbodiimide described in step 3 to dimethylformamide is (0.2g ~0.4g): (100mL~150mL). Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0066] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the mass ratio of polyetheramine described in step three to dimethylformamide is (0.2g~0.4g): (100mL ~ 150mL). Other steps are the same as those in Embodiment 1 or 2.

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Abstract

Relating to a carbon fiber surface grafting method, the invention provides a method for green grafting of polyether amine on a carbon fiber surface. The invention aims to solve the problems of great loss of loaded carbon fiber body strength and low interfacial bonding strength of a carbon fiber composite material in existing carbon fiber surface modification methods. The method includes: 1. cleaning; 2. oxidation; 3. carbon fiber grafting treatment, thus obtaining carbon fiber with a surface grafted with polyether amine, i.e. accomplishing the method for green grafting of polyether amine on the carbon fiber surface. The interfacial shear strength of the carbon fiber with the surface grafted with polyether amine prepared by the method provided by the invention is increased from the 48.8MPa of protofilament to 76.6Mpa-82.3MPa, and is improved by more than 57.4%. The tensile strength of the carbon fiber with the surface grafted with polyether amine prepared by the method provided by the invention is enhanced from 3.80GPa to 3.89Gpa-3.92GPa, and is improved by 2.4%-3.2%. The invention can acquire the method for green grafting of polyether amine on a carbon fiber surface.

Description

technical field [0001] The invention relates to a method for grafting carbon fiber surface. Background technique [0002] Carbon fiber is widely used as a reinforcing filler for polymer matrix composites due to its high specific strength / stiffness, chemical corrosion resistance, high temperature resistance, excellent electrical and thermal conductivity and other characteristics. Carbon fiber reinforced resin matrix composites are the most widely used high-performance structural materials in aerospace and other military industries, and their consumption has become an important symbol of the advancement of aeronautical structural components. The interface is a unique component of composite materials, which is directly related to whether the load can be transmitted and dispersed evenly and effectively between the matrix and the reinforcement. Therefore, in order to improve the interface performance and comprehensive performance of composite materials, it is necessary to contro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/53D06M11/50D06M11/65D06L1/02D06M101/40
CPCD06L1/02D06M11/50D06M11/65D06M15/53D06M2101/40
Inventor 马丽春宋国君朱莹莹余文佳韩萍王刚李晓茹
Owner 青岛碳智新材料科技有限公司
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