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Method for preparing nanometer silicon dioxide grafted carbon fiber reinforcements by aid of mercapto-alkene click reaction

A technology of nano-silica and carbon fiber, which is applied in the field of preparing nano-silica grafted carbon fiber reinforcements, can solve the problems of poor treatment effect, high requirements for equipment and technology, and achieve good adhesion and thermal stability. , the effect of high grafting rate

Inactive Publication Date: 2016-06-08
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional carbon fiber surface treatment technology has high requirements on equipment and process, and the treatment effect is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] This example illustrates a method for preparing a nano-silica grafted carbon fiber reinforcement by using a mercapto-ene click reaction provided by the present invention.

[0019] Step 1: Add 1g of nano-silica and 0.4g of deionized water to 30mL of ethanol, after ultrasonic treatment for 120 minutes, add 2g of mercaptosilane-containing coupling agent (γ-mercaptopropylmethyldimethoxysilane), Put it in an oil bath at 70°C for reflux reaction for 5 hours. After the reaction, wash it with ethanol for 4 times to remove the ungrafted mercapto-containing silane coupling agent, and dry it in a vacuum oven at 100°C for 24 hours to obtain Containing mercaptosilane coupling agent grafted nano-silica;

[0020] Step 2: Immerse 5g of carbon fiber in 160mL of mixed acid, ultrasonically treat it for 60 minutes, then transfer it to an oil bath at 80°C for 4 hours, wash it with deionized water until neutral, and then dry it in a vacuum oven at 100°C After 24 hours, the acid-treated carb...

Embodiment 2

[0025] This example illustrates a method for preparing a nano-silica grafted carbon fiber reinforcement by using a mercapto-ene click reaction provided by the present invention.

[0026] Step 1: Add 1g of nano-silica and 0.4g of deionized water to 60mL of ethanol, after ultrasonic treatment for 60 minutes, add 3g of mercaptosilane-containing coupling agent (γ-mercaptopropyltriethoxysilane), put Reflux and react in an oil bath at 75°C for 6 hours. After the reaction, wash with ethanol for 4 times to remove the ungrafted mercapto-containing silane coupling agent, and place it in a vacuum oven at 100°C for 24 hours to obtain a mercapto-containing silane coupling agent. Silane coupling agent grafted nano silica;

[0027] Step 2: Immerse 5g of carbon fiber in 120mL of mixed acid, ultrasonically treat it for 90 minutes, then transfer it to an oil bath at 100°C for 2 hours, wash it with deionized water until neutral after the reaction, and then dry it in a vacuum oven at 100°C After...

Embodiment 3

[0032] This example illustrates a method for preparing a nano-silica grafted carbon fiber reinforcement by using a mercapto-ene click reaction provided by the present invention.

[0033] Step 1: Add 1g of nano-silica and 0.4g of deionized water to 45mL of ethanol, after ultrasonic treatment for 90 minutes, add 4g of mercaptosilane-containing coupling agent (γ-mercaptopropyltrimethoxysilane), put in oil Reflux reaction at 60°C for 4 hours in a bath, wash with ethanol 4 times after the reaction to remove ungrafted mercaptosilane-containing coupling agent, and dry in a vacuum oven at 100°C for 24 hours to obtain mercaptosilane Coupling agent grafted nano silica;

[0034] Step 2: Immerse 5g of carbon fiber in 100mL of mixed acid, ultrasonically treat it for 120 minutes, and then transfer it to an oil bath at 90°C for 3 hours. After the reaction, wash it with deionized water until it is neutral, and then dry it in a vacuum oven at 100°C. After 24 hours, the acid-treated carbon fib...

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Abstract

The invention relates to a method for preparing nanometer silicon dioxide grafted carbon fiber reinforcements by the aid of mercapto-alkene click reaction. The method includes particular steps of 1), carrying out sulfhydrylation treatment on nanometer silicon dioxide; 2), carrying out acidification treatment on carbon fibers; 3), carrying out amination treatment on the surfaces of the carbon fibers; 4), preparing allyl glycidyl ether grafted carbon fibers; 5), preparing the nanometer silicon dioxide grafted carbon fiber reinforcements by the aid of the mercapto-alkene click reaction. The method has the advantages that the surface roughness can be improved after the nanometer silicon dioxide is grafted on the surfaces of the carbon fibers, the carbon fiber and resin wettability can be obviously improved, the method is favorable for increasing interface binding force between the carbon fibers and resin matrixes, and mechanical properties of carbon fiber reinforcement composite materials can be improved; the heat stability of the carbon fibers can be obviously improved after the nanometer silicon dioxide is grafted on the surfaces of the carbon fibers; the method is short in reaction period, high in yield and favorable for large-scale production, and byproducts are harmless.

Description

technical field [0001] The invention relates to a method for preparing nano silicon dioxide grafted carbon fiber reinforced body by using mercapto-ene click reaction. Background technique [0002] Carbon fiber is a new type of material with low density, high specific strength, high specific modulus, fatigue resistance, thermal conductivity, electrical conductivity and other advantages. It has been widely used in aviation, aerospace, stationery and textile machinery and other fields. However, due to the structural characteristics of carbon fiber itself, its adhesion to the resin matrix is ​​poor, and the interface is not strong enough when it is compounded with the resin matrix, and many excellent properties of the composite material cannot be well exerted. Therefore, the surface modification of carbon fibers is a key issue in the application of carbon fibers in polymer matrix composites. [0003] The traditional carbon fiber surface treatment technology has high requirement...

Claims

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Application Information

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IPC IPC(8): C08K9/06C08K9/04C08K9/02C08K7/06
CPCC08K7/06C08K9/02C08K9/04C08K9/06
Inventor 熊磊兰道松梁红波黄圣梅
Owner NANCHANG HANGKONG UNIVERSITY
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