Preparation method of polyhedral oligomeric silsesquioxane-grafted carbon fiber reinforcement

A technology of polysilsesquioxane and carbon fiber, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc. It can solve the problems of low interface bonding strength, poor resin wettability, and affecting the performance of carbon fiber, etc., to achieve good adhesion, The effect of high interface bonding strength and high grafting rate

Inactive Publication Date: 2016-07-20
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inert surface of carbon fiber and poor wettability with resin, the interfacial bonding strength between carbon fiber and resin matrix is ​​not high during compounding. These shortcomings affect the performance of carbon fiber, so its surface needs to be modified.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] This example illustrates the preparation method of a cage polysilsesquioxane grafted carbon fiber reinforcement provided by the present invention.

[0018] Step 1: Add 10g of carbon fiber to 150mL of concentrated nitric acid with a mass fraction of 65%, ultrasonic treatment for 60 minutes, then gradually raise the temperature to 100°C in an oil bath, react for 2 hours, and wash the obtained product with deionized water To neutrality, dry in a vacuum oven at 100°C for 24 hours to obtain acid-treated carbon fibers;

[0019] Step 2: Mix 5g of acid-treated carbon fiber and 10g of vinyl silane coupling agent (vinyltriethoxysilane), add it to 100mL of ethanol solvent, adjust the pH value to 4 with acetic acid, ultrasonicate for 45 minutes, and then React at 60°C for 4 hours. After the reaction, wash with ethanol for 4 times to remove the ungrafted vinyl silane coupling agent, and dry it in a vacuum oven at 100°C for 24 hours to obtain the grafted vinyl silane coupling agent. ...

Embodiment 2

[0023] This example illustrates the preparation method of a cage polysilsesquioxane grafted carbon fiber reinforcement provided by the present invention.

[0024] The first step: Add 10g of carbon fiber to 180mL of concentrated nitric acid with a mass fraction of 65%, ultrasonic treatment for 30 minutes, then gradually raise the temperature to 90°C in an oil bath, react for 3 hours, and wash the obtained product with deionized water To neutrality, dry in a vacuum oven at 100°C for 24 hours to obtain acid-treated carbon fibers;

[0025] Step 2: Mix 5g of acid-treated carbon fiber and 5g of vinyl silane coupling agent (vinyltrimethoxysilane), add it to 120mL of ethanol solvent, adjust the pH value to 3 with acetic acid, ultrasonicate for 30 minutes, and then in React at 75°C for 5 hours. After the reaction, wash with ethanol for 4 times to remove the ungrafted vinyl silane coupling agent, and dry it in a vacuum oven at 100°C for 24 hours to obtain the grafted vinyl silane coupli...

Embodiment 3

[0029] This example illustrates the preparation method of a cage polysilsesquioxane grafted carbon fiber reinforcement provided by the present invention.

[0030] Step 1: Add 10g of carbon fiber to 200mL of concentrated nitric acid with a mass fraction of 65%, ultrasonic treatment for 45 minutes, then gradually raise the temperature to 80°C in an oil bath, react for 4 hours, and wash the obtained product with deionized water To neutrality, dry in a vacuum oven at 100°C for 24 hours to obtain acid-treated carbon fibers;

[0031] Step 2: Mix 5g of acid-treated carbon fiber and 8g of vinyl silane coupling agent (methacryloxypropyl trimethoxysilane), add it to 160mL of ethanol solvent, adjust the pH value to 5 with acetic acid, and ultrasonically Treat for 60 minutes, then react at 40°C for 6 hours, wash with ethanol 4 times after the reaction to remove ungrafted vinyl silane coupling agent, and dry in a vacuum oven at 100°C for 24 hours to obtain vinyl Silane coupling agent graf...

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Abstract

The invention relates to a preparation method of a polyhedral oligomeric silsesquioxane-grafted carbon fiber reinforcement. The preparation method comprises the following steps of firstly, grafting a vinyl silane coupling agent onto the carbon fiber surface which is acidified by a hydrolysis method; then, generating a click reaction between introduced vinyl on the carbon fiber surface and sulfydryl on the sulfydryl polyhedral oligomeric silsesquioxane, so as to obtain the polyhedral oligomeric silsesquioxane-grafted carbon fiber reinforcement. After the polyhedral oligomeric silsesquioxane is introduced onto the carbon fiber surface, the wettability between the carbon fiber and the resin is improved, and the interfacial strength between the carbon fiber and the resin is improved. The preparation method has the advantages that the process is simple, the reaction time is short, the byproduct has no toxicity, and the scaled production is favorably realized.

Description

technical field [0001] The invention relates to a preparation method of cage polysilsesquioxane grafted carbon fiber reinforced body. Background technique [0002] Carbon fiber is a new type of inorganic fiber material. Compared with traditional fiber materials, carbon fiber not only has higher specific strength and specific modulus, but also has good high temperature resistance, strong fatigue resistance, low thermal expansion coefficient, good corrosion resistance, and X-ray transmission. Good performance, so it is widely used in aerospace and other fields. However, due to the inert surface of carbon fiber and poor wettability with resin, the interfacial bonding strength between carbon fiber and resin matrix is ​​not high during composite. These shortcomings affect the performance of carbon fiber, so its surface needs to be modified. [0003] Cage polysilsesquioxane is a new type of organic-inorganic hybrid material. Its interior is composed of silicon and oxygen to form ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/06C08K7/06D06M11/64D06M13/513D06M15/643C08G77/04D06M101/40
CPCC08G77/045C08K7/06C08K9/06D06M11/64D06M13/513D06M15/643D06M2101/40
Inventor 熊磊王秋萍梁红波黄圣梅
Owner NANCHANG HANGKONG UNIVERSITY
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