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Modified carbon fiber and preparation of modified carbon fiber and nylon 6 composite materials

A technology for modifying carbon and carbon fiber, which is applied in the fields of carbon fiber, fiber processing, textiles and paper making, etc. It can solve difficult chemical bonding of PA6 matrix, poor wettability and bonding between CF surface and PA6 matrix, and restrict CF/PA6 composite materials. application and other issues to achieve the effect of increasing the degree of disorder, improving the interfacial compatibility and bonding, and improving the heat and humidity resistance and mechanical properties

Pending Publication Date: 2020-05-12
GUIZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The active functional groups on the commercial CF surface are less, showing chemical inertness, and it is difficult to combine with the PA6 matrix by chemical bonding, resulting in poor wettability and binding between the CF surface and the PA6 matrix, which restricts the application of CF / PA6 composite materials

Method used

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  • Modified carbon fiber and preparation of modified carbon fiber and nylon 6 composite materials
  • Modified carbon fiber and preparation of modified carbon fiber and nylon 6 composite materials
  • Modified carbon fiber and preparation of modified carbon fiber and nylon 6 composite materials

Examples

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Embodiment Construction

[0036] 1. CF surface pretreatment

[0037] (1) Cut 10 sections of CF precursors each 3 meters long, dry, weigh and number them. For the heating device in the constant temperature oil bath experiment, open the oil bath in advance to adjust the temperature to a constant temperature, wrap the CF on the steam outlet end of the extraction tube, pour 150ml of acetone solution into the extraction bottle, connect the condenser tube to tap water, and assemble the extraction bottle, extraction tube and serpentine condenser, and then put them in a constant temperature oil bath. The acetone vapor cleaning process on the CF surface shown in Table 1 explores the influence of the system reaction time and reaction temperature (80°C is the critical temperature at which the acetone vapor reaches the steam outlet) on the cleaning of the CF surface.

[0038] Table 1 Acetone vapor cleaning treatment CF process

[0039] Serial number 1 2 3 4 5 6 7 8 9 10 Temperature(°C) ...

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Abstract

The invention discloses modified carbon fiber. The modified carbon fiber is characterized by being prepared through firstly treating carbon fiber by a Soxhlet extractor steam molecule pretreatment method, and then carrying out electrophoretic deposition of chitosan to modify the carbon fiber, wherein the steam molecules are acetone and concentrated nitric acid. (1) A novel pretreatment method, namely the Soxhlet extractor steam molecule pretreatment method is proposed, and compared with a traditional solvent soaking treatment method, the novel pretreatment method has the advantages that the damage to the bulk property of CF is reduced and uniform and effective cleaning and oxidation treatment can be carried out on the surface of the CF. (2) In the electrophoretic deposition process, the CFis modified by positively charged chitosan molecules, so that the chemical activity of the surface of the CF and the disorder degree of a graphite layer are improved, the surface roughness is improved, the interface compatibility and associativity of the CF and PA6 are improved and the moisture and heat resistance and the mechanical properties of the CF / PA6 composite materials are improved.

Description

technical field [0001] The invention relates to a carbon fiber modification and a preparation method of a composite material of the modified carbon fiber and nylon 6, specifically in the field of carbon fiber modification research. Background technique [0002] From a geometric point of view, carbon fiber (CF) monofilaments roughly belong to a kind of cylinder, and their structure and properties show centrosymmetry along the axial direction. CF not only has the characteristics of high strength and high modulus in terms of mechanics, but also has high thermal conductivity and electrical conductivity, excellent corrosion resistance, low linear thermal expansion coefficient and low density, etc., which establishes it as a reinforcing phase filled in the matrix material Mechanics and hygrothermal properties of medium-reinforced composites. At present, CF composite materials have been widely used in some cutting-edge fields, such as automobiles, sports equipment, ships, aerospac...

Claims

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Application Information

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IPC IPC(8): D06M15/03D06M13/127D06M11/64D06M23/00C08L77/02C08K9/02C08K9/04C08K7/06D06M101/40
CPCD06M15/03D06M13/127D06M11/64D06M23/00C08K9/02C08K9/04C08K9/08C08K7/06C08L2201/08D06M2101/40
Inventor 何敏张道海秦舒浩徐国敏刘玉飞张凯龙丽娟
Owner GUIZHOU UNIV
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