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Method for efficiently preparing carbon fiber-grafted polymer

A technology of grafting polymer and carbon fiber, applied in the direction of carbon fiber, fiber processing, textiles and papermaking, etc., can solve the problems of low-carbon fiber body with low graft rate, damage to carbon fiber interface strength, high energy consumption, and reduce pollution and energy consumption. , the effect of improving the interfacial shear strength and increasing the grafting rate

Active Publication Date: 2017-09-22
QINGDAO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of high energy consumption, environmental pollution, low grafting rate, serious damage to the carbon fiber body and low interface strength of the modified carbon fiber in the existing modification method of carbon fiber, and to provide a high-efficiency carbon fiber grafting method. dendrimer approach

Method used

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  • Method for efficiently preparing carbon fiber-grafted polymer
  • Method for efficiently preparing carbon fiber-grafted polymer

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specific Embodiment approach 1

[0043] Specific embodiment one: this embodiment is a kind of method of high-efficiency carbon fiber grafting polymer specifically is finished according to the following steps:

[0044] 1. Extraction of carbon fiber:

[0045] Put the carbon fiber in a Soxhlet extractor, then use acetone as a cleaning agent, and heat and reflux at a temperature of 80°C to 82°C for 48h to 50h to obtain the extracted carbon fiber; place the extracted carbon fiber in a vacuum Vacuum drying in a drying oven to obtain cleaned carbon fibers;

[0046] 2. Oxidation of carbon fiber:

[0047] ①. Dissolve silver nitrate in distilled water, then add potassium persulfate, and then sonicate at an ultrasonic power of 350W-400W for 10min-15min to obtain a black solution;

[0048] The concentration of silver nitrate in the black solution described in step 2. 1. is 0.008mol / L~0.01mol / L;

[0049] The concentration of potassium persulfate in the black solution described in step 2. 1. is 0.08mol / L~0.1mol / L;

[0...

specific Embodiment approach 2

[0075] Embodiment 2: This embodiment differs from Embodiment 1 in that: the temperature of the vacuum drying described in step 1 is 80° C. to 85° C., and the degree of vacuum is -0.1 MPa. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0076] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the temperature of the vacuum drying described in Step 2 ⑥ is 80°C-85°C, and the degree of vacuum is -0.1MPa. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for efficiently preparing a carbon fiber-grafted polymer and relates to a carbon fiber surface modifying method. The invention aims to solve the problems of high energy consumption, environment pollution, low grafting degree, serious damage to the main bodies of carbon fibers, and low interfacial strength of the modified carbon fibers of the current carbon fiber modifying method. The method comprises the following steps of 1, extracting the carbon fibers; 2, oxidizing the carbon fibers; and 3, grafting PEI (Polyetherimide) to the carbon fibers to obtain the carbon fiber grafted polyethyleneimine. Content of nitrogen element of the carbon fiber-grafted polyethyleneimine prepared by the method is up to 15.51 to 17.84 percent; compared with the carbon fibers, the carbon fiber-grafted polyethyleneimine prepared by the method is obviously improved in interfacial shear strength, and the interfacial shear strength is improved to 73.7MPa to 89.6MPa from 48.8MPa of the carbon fibers and is improved by 51 to 83.6 percent. An efficient carbon fiber-grafted polymer can be obtained by the method.

Description

technical field [0001] The invention relates to a method for modifying the surface of carbon fibers. Background technique [0002] As a representative of high-performance composite material reinforcement, carbon fiber has high strength, high modulus, good chemical and thermal stability, and has been widely used in aerospace, electronics, transportation and other fields in recent years. Therefore, carbon fiber reinforced composites are a very important research direction in high-performance materials. The quality of the interface between carbon fiber and polymer matrix is ​​very important to the properties of carbon fiber reinforced composites, high quality interface can enhance the compatibility and load transfer between carbon fiber and matrix. However, due to the smooth surface of carbon fiber, chemical amphobia and chemical inertness, poor wettability with the resin matrix, there are many interface defects, resulting in unsatisfactory interface bonding, and the performan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/61D06M11/50D06M101/40
CPCD06M11/50D06M15/61D06M2101/40
Inventor 韩萍宋国君马丽春李晓茹石龙龙王刚丛龙亮江水青
Owner QINGDAO UNIV
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