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Carbon fiber surface modification emulsion, preparation method thereof, and modified carbon fiber and polyamide composite prepared therefrom

A technology of surface modification and surface modifier, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc. It can solve the problems of easy damage to the surface of carbon fiber, high production and operation costs, and destructive mechanical properties, and achieve good impact strength, The effect of small impact and simple process

Active Publication Date: 2015-12-23
GUANGZHOU KINGFA CARBON FIBER NEW MATERIALS DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the interfacial properties between carbon fiber and matrix polyamide, the surface of carbon fiber is usually oxidized in industry to give active oxygen-containing functional groups such as hydroxyl and carbonyl on the surface of carbon fiber. Common methods include anodic oxidation, nitric acid oxidation, and potassium permanganate oxidation. method, etc., but such methods are easy to damage the surface of carbon fiber and destroy its mechanical properties
In order not to damage the surface of the fiber and improve the interfacial performance between the carbon fiber and the matrix, the Chinese patent application CN1944783A uses polymer grafting technology to modify the surface of the carbon nanofiber, so that the surface of the fiber is rich in a variety of active functional groups. However, this method is complicated. Harsh conditions and high production and operation costs limit industrial production to a certain extent

Method used

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  • Carbon fiber surface modification emulsion, preparation method thereof, and modified carbon fiber and polyamide composite prepared therefrom
  • Carbon fiber surface modification emulsion, preparation method thereof, and modified carbon fiber and polyamide composite prepared therefrom
  • Carbon fiber surface modification emulsion, preparation method thereof, and modified carbon fiber and polyamide composite prepared therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Preparation of surface modifier: Add 0.1mol of 1,1-dimethyl-1,2-diamine to a 1.5L polymerization kettle, add 300mL of ethanol, dissolve, and then dropwise add 0.2mol of 3,5-dihydroxy salicyl Aldehyde ethanol solution 300mL, control the temperature of the polymerization kettle at 55°C, reflux for 6 hours, add 300mL of DMSO solution, control the temperature of the polymerization kettle at 0°C, and then add 4 equivalents of NaBH 4 , stirred until the reaction solution was colorless, the reaction was complete. Add 500 mL of water to the reaction system, and separate the layers. CH 2 Cl 2 Extraction, combined organic layer, with anhydrous Na 2 SO 4 Drying, standing, filtering, and rotary evaporation of the solution to obtain a surface modifier

[0088] 40g PA66 and 9.5g surface modifier Place in a 1000mL beaker, add 100mlDMSO, stir evenly, stir with a high-shear dispersing emulsifier (manufactured by Shanghai Fluke Electromechanical Equipment Co., Ltd., model FA40),...

Embodiment 2

[0093] Preparation of surface modifier: Add 0.1mol of 1,1,2-trimethyl-1,2-diamine to a 1.5L polymerization kettle, add 300mL of ethanol to dissolve, then dropwise add 0.3mol of 3,5-dihydroxy Salicylaldehyde ethanol solution 300mL, control the temperature of the polymerization kettle at 55°C, after reflux for 6h, add 300mL of DMSO solution, control the temperature of the polymerization kettle at 0°C, and then add 4 equivalents of NaBH 4 , stirred until the reaction solution was colorless, the reaction was complete. Add 500 mL of water to the reaction system, and separate the layers. CH 2 Cl 2 Extraction, combined organic layer, with anhydrous Na 2 SO 4 Drying, standing, filtering, and rotary evaporation of the solution to obtain a surface modifier

[0094] 71.25g PA66 and 47.5g surface modifier Place in a 1000mL beaker, add 100ml DMSO, stir evenly, and stir with a high-shear dispersing emulsifier at a speed of 12000r / min. Take 232g of distilled water, 4.75g of emulsif...

Embodiment 3

[0099] Preparation of surface modifier: Add 0.1mol of 1,1-dimethyl-1,2-diamine to a 1.5L polymerization kettle, add 300mL of ethanol to dissolve, and then dropwise add 0.4mol of 3,5-dihydroxy salicyl Aldehyde ethanol solution 300mL, control the temperature of the polymerization kettle at 55°C, reflux for 6 hours, add 300mL of DMSO solution, control the temperature of the polymerization kettle at 0°C, and then add 4 equivalents of NaBH 4 , stirred until the reaction solution was colorless, the reaction was complete. Add 500 mL of water to the reaction system, and separate the layers. CH 2 Cl 2 Extraction, combined organic layer, with anhydrous Na 2 SO 4 Drying, standing, filtering, and rotary evaporation of the solution to obtain a surface modifier

[0100] 4.75g PA66 and 9.5g surface modifier Place in a 1000ml beaker, add 100mL DMSO, stir evenly, and stir with a high-shear dispersing emulsifier at a speed of 12000r / min. Take 298.5g of distilled water, 0.95g of emulsi...

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Abstract

The invention provides a carbon-fiber-surface modifying emulsion, a preparation method thereof, and modified carbon fiber and polyamide complex prepared from the same. The carbon-fiber-surface modifying emulsion comprises the following compositions: 2-10 wt% of a surface modifier, 1-15 wt% of polyamide, 0.7-3 wt% of an emulsifier, 0-25 wt% of an organic solvent and 47-96.3 wt% of water. The surface modifier has a structural formula shown in the specification, and in the structural formula, R1, R2, R1' and R2' independently represent hydrogen, hydroxyl or a C1-C3 alkyl. The invention also provided the preparation method of the carbon-fiber-surface modifying emulsion, the modified carbon fiber obtained by employing the above emulsion and a preparation method, and the polyamide complex containing the modified carbon fiber and a preparation method and application of the polyamide complex. The carbon fiber modified by employing the carbon-fiber-surface modifying emulsion is high in surface resin content and good in compatibility with resin, and the prepared polyamide complex is good in mechanical properties.

Description

technical field [0001] The invention relates to a modifier, in particular to a carbon fiber surface modified emulsion and a preparation method thereof, carbon fiber using the carbon fiber surface modified emulsion, and a polyamide compound prepared from modified carbon fiber and polyamide. Background technique [0002] Carbon fiber has outstanding mechanical properties. Carbon fiber is widely used in composite materials for reinforcement. In recent years, improving the interfacial properties between carbon fiber and matrix polyamide has become a research hotspot. Carbon fiber has few active functional groups on the surface, less effective chemical bonds and poor compatibility when compounded with matrix polyamide, which leads to the formation of brittle interfacial layer structure in carbon fiber composite materials. In order to improve the interfacial performance between carbon fiber and matrix polyamide, the surface of carbon fiber is usually oxidized in industry to endow ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/59D06M13/368C08L77/00C08K9/04C08K7/06C08K3/04D06M101/40
Inventor 谢怀玉宋威蔡彤旻雷震易明黄险波陈大华
Owner GUANGZHOU KINGFA CARBON FIBER NEW MATERIALS DEV