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Preparation method of carbon fiber reinforced nylon composite material

A nylon composite material and carbon fiber technology, which is applied in the field of carbon fiber reinforced nylon composite material preparation, can solve the problems that are not conducive to the infiltration of thermoplastic resin matrix, increase the clustering of carbon fiber tows, and the low activity of reactive groups, etc., to achieve improvement Interfacial bonding force, enhancing interface and mechanical properties, improving the effect of interfacial bonding

Active Publication Date: 2018-09-07
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method sizing the carbon fiber twice, the sizing amount is as high as 5.2-7.5%, which greatly increases the clustering of the carbon fiber tow, which is not conducive to the wettability between the thermoplastic resin matrix; secondly, the reactive group of the thermoplastic sizing agent itself Low activity and weak interfacial bonding with carbon fibers, resulting in a small improvement in the interfacial performance of the thermoplastic sizing agent for carbon fiber reinforced thermoplastic resins

Method used

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  • Preparation method of carbon fiber reinforced nylon composite material
  • Preparation method of carbon fiber reinforced nylon composite material
  • Preparation method of carbon fiber reinforced nylon composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of carbon fiber reinforced nylon composite material, the preparation steps are as follows:

[0040] (1) The polyacrylonitrile-based carbon fiber coated with epoxy resin sizing agent is kept for 10 min under an oxidizing atmosphere of 280 ° C to obtain a carbon fiber with low temperature heat treatment, wherein the oxidizing atmosphere is an air environment, and the carbon fiber obtained after the above-mentioned treatment The XPS surface chemical composition and structural map such as figure 1 shown;

[0041] (2) After the carbon fiber heat-treated at low temperature is evenly spread, the nylon membrane is placed on both sides of the evenly spread carbon fiber, and the evenly spread surface density is 230g / m 2 , the volume ratio of nylon membrane and carbon fiber is 1:1, the thickness of nylon membrane is 50μm, and the material is nylon 66;

[0042] (3) The carbon fiber reinforced nylon composite material was prepared by thermocompression bonding,...

Embodiment 2

[0050] A preparation method of carbon fiber reinforced nylon composite material, the preparation steps are as follows:

[0051] (1) The carbon fiber of low temperature heat treatment is obtained by keeping the petroleum pitch-based carbon fiber coated with lactone-modified epoxy resin sizing agent for 0.5 min under an oxidizing atmosphere of 250 ° C, wherein the oxidizing atmosphere is a nitrogen dioxide environment;

[0052] (2) After the carbon fiber heat-treated at low temperature is evenly spread, place the nylon membrane on both sides of the evenly spread carbon fiber, and the evenly spread surface density is 60g / m 2 , the volume ratio of nylon membrane and carbon fiber is 8:2, the thickness of nylon membrane is 100μm, and the material is nylon 6;

[0053] (3) The carbon fiber reinforced nylon composite material was prepared by thermocompression bonding, wherein the thermocompression bonding temperature was 200° C. and the pressure was 4MPa.

[0054] The interlaminar she...

Embodiment 3

[0056] A preparation method of carbon fiber reinforced nylon composite material, the preparation steps are as follows:

[0057] (1) The coal pitch-based carbon fiber coated with vinyl unsaturated polyester resin sizing agent is kept for 15 minutes under an oxidative atmosphere of 350 ° C to obtain a carbon fiber with low temperature heat treatment, wherein the oxidative atmosphere is a chlorine gas environment;

[0058] (2) After the carbon fiber heat-treated at low temperature is evenly spread, the nylon membrane is placed on both sides of the evenly spread carbon fiber, and the evenly spread surface density is 400g / m 2 , the volume ratio of nylon membrane and carbon fiber is 3:7, the thickness of nylon membrane is 10μm, and the material is nylon 12;

[0059] (3) The carbon fiber reinforced nylon composite material was prepared by thermocompression bonding, wherein the thermocompression bonding temperature was 300° C. and the pressure was 7MPa.

[0060] The interlaminar shea...

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Abstract

The invention relates to a preparation method of a carbon fiber reinforced nylon composite material. Firstly, carbon fibers having the surface coated with a thermosetting resin sizing agent are subjected to heat treatment at low temperature, then the carbon fibers subjected to heat treatment at low temperature are evenly spread, then nylon films are placed on both sides of the evenly spread carbonfibers, and finally the carbon fiber reinforced nylon composite material is prepared by hot pressing and bonding, wherein the low temperature heat treatment comprises that heat preservation is carried out for 0.5-15 min under a condition of the temperature of 250-350 DEG C. The preparation method of the carbon fiber reinforced nylon composite material has the advantages of low heat treatment temperature, low energy consumption and good treatment effect, and the surface after treatment is rich in carboxyl which can react with a thermoplastic resin matrix, the chemical bonding between the carbon fibers and the nylon resin matrix is facilitated, the interfacial properties between the carbon fibers and the nylon matrix are greatly improved, the mechanical properties of the prepared compositematerial are improved and the prepared composite material has excellent application prospect.

Description

technical field [0001] The invention belongs to the field of carbon fiber composite material preparation, and relates to a preparation method of a carbon fiber reinforced nylon composite material. Background technique [0002] Compared with carbon fiber reinforced thermoset resin matrix composites, carbon fiber reinforced thermoplastic resin (CFRTP) matrix composites have unique advantages, such as fast forming, easy repair, recyclability, low cost, excellent ultimate fatigue resistance and prepreg storage conditions Simple advantages, it is widely used in aerospace, sports leisure and automotive fields. However, carbon fiber reinforced thermoplastic resin (CFRTP)-based composites have poor interfacial bonding with traditional carbon fibers due to their unique properties and high processing temperature, resulting in low overall mechanical properties of the composites, which are restricting its application in some fields. application and promotion. [0003] As an engineerin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/06C08L77/00C08K9/04C08K7/06
CPCC08J5/06C08J2377/00C08K7/06C08K9/08
Inventor 吕永根姚莉丽李志豪张锦财郭玉花
Owner DONGHUA UNIV