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Preparation method of acrylic polymer grafted carbon fiber multi-scale reinforcement

An acrylic and carbon fiber technology, which is applied in fiber processing, physical processing, textiles and papermaking, etc., can solve the problems that the mechanical properties of composite materials such as flexural strength and impact strength have not been effectively improved, and achieve less interface defects. Good performance, the effect of improving tensile strength

Inactive Publication Date: 2015-05-13
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the mechanical properties such as bending strength and impact strength of the composite material made of carbon fiber treated by the above method have not been effectively improved.

Method used

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  • Preparation method of acrylic polymer grafted carbon fiber multi-scale reinforcement

Examples

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example 1

[0017] This example illustrates the preparation method of the acrylic polymer grafted carbon fiber multi-scale reinforcement provided by the present invention;

[0018] Step 1: Immerse 2g of carbon fiber in 60mL of concentrated nitric acid with a concentration of 68%, ultrasonically treat it for 8 hours, and then transfer it to an oil bath at 100°C for 3 hours of reflux reaction. Dry in a vacuum oven at 60°C for 24 hours to obtain nitric acid oxidation treated carbon fiber ;

[0019] Step 2: Oxidize 1g of nitric acid to treat carbon fiber Disperse in 50mL of toluene, add 15g of silane coupling agent (γ-aminopropyltriethoxysilane) after ultrasonic treatment for 20 minutes, then heat up to 120°C, reflux for 7 hours, cool and discharge, wash with toluene 3 times Remove ungrafted silane coupling agent. Vacuum drying at room temperature for 24 hours to obtain silane coupling agent grafted carbon fiber ;

[0020] Step 3: Graft 1g of silane coupling agent to carbon fiber at r...

example 2

[0023] This example illustrates the preparation method of the acrylic polymer grafted carbon fiber multi-scale reinforcement provided by the present invention;

[0024] The first step: immerse 2g of carbon fiber in 80mL of concentrated nitric acid with a concentration of 65%, ultrasonically treat it for 10 hours, and then transfer it to an oil bath at 110°C for 2 hours of reflux reaction. Dry in a vacuum oven at 60°C for 24 hours to obtain nitric acid oxidation treated carbon fiber ;

[0025] Step 2: Oxidize 1g of nitric acid to treat carbon fiber Disperse in 80mL of toluene, add 18g of silane coupling agent (γ-aminopropyltriethoxysilane) after ultrasonic treatment for 30 minutes, then heat up to 110°C, reflux for 5 hours, cool and discharge, wash with toluene 5 times Remove ungrafted silane coupling agent. Vacuum drying at room temperature for 24 hours to obtain silane coupling agent grafted carbon fiber ;

[0026] Step 3: Graft 1g of silane coupling agent to carbon f...

example 3

[0029] This example illustrates the preparation method of the acrylic polymer grafted carbon fiber multi-scale reinforcement provided by the present invention;

[0030] Step 1: Immerse 2g of carbon fiber in 100mL of concentrated nitric acid with a concentration of 67%, ultrasonically treat it for 6 hours, and then transfer it to an oil bath at 120°C for 4 hours of reflux reaction. Dry in a vacuum oven at 60°C for 24 hours to obtain nitric acid oxidation treated carbon fiber ;

[0031] Step 2: Oxidize 1g of nitric acid to treat carbon fiber Disperse in 40mL of toluene, add 20g of silane coupling agent (γ-aminopropyltriethoxysilane) after ultrasonic treatment for 60 minutes, then heat up to 100°C, reflux for 8 hours, cool and discharge, wash with toluene 4 times Remove ungrafted silane coupling agent. Vacuum drying at room temperature for 24 hours to obtain silane coupling agent grafted carbon fiber ;

[0032] Step 3: Graft 1g of silane coupling agent to carbon fiber at ...

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Abstract

The invention discloses a preparation method of an acrylic polymer grafted carbon fiber multi-scale reinforcement, relating to a carbon fiber reinforcement and a preparation method thereof. The preparation method comprises the following steps of: 1) performing oxidation treatment on a carbon fiber surface; 2) grafting a silane coupling agent to the carbon fiber surface after the oxidation treatment; 3) obtaining chain transfer agent grafted carbon fiber through a reaction between the carbon fiber surface grafted silane coupling agent and a chain transfer agent; and 4) initiating acrylic monomer grafting polymerization on the surface of the chain transfer agent grafted carbon fiber to finally obtain an acrylic polymer grafted carbon fiber multi-scale reinforcement. The method disclosed by the invention has the advantages that the roughness of the carbon fiber surface can be greatly improved, a great quantity of active functional groups can be introduced, the reaction activity of the carbon fiber surface is improved, the wettability and cohesiveness between the carbon fiber and a resin matrix are improved, and the interlaminar shear strength of an epoxy composite material is enhanced by 40-50%.

Description

technical field [0001] The invention relates to a preparation method of an acrylic polymer grafted carbon fiber multi-scale reinforcement. Background technique [0002] As a high-performance fiber, carbon fiber has a series of excellent properties such as high specific strength, high specific modulus, fatigue resistance, creep resistance, small thermal expansion coefficient and low friction coefficient, and has become one of the most important reinforcing materials in recent years. It is widely used in many fields. However, due to the graphite random layer structure on the surface of the carbon fiber, the surface is inert, the surface energy is low, and the active functional groups are few, so there are many defects in the bonding interface with the matrix, and the interface bonding strength is low. The interlayer shear strength of the composite material Low. In addition, carbon fiber composites are very anisotropic materials, and their excellent physical and mechanical...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00C08F2/38D06M14/36D06M10/08D06M11/64
Inventor 熊磊李晓丰梁红波黄圣梅
Owner NANCHANG HANGKONG UNIVERSITY
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