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Carbon fiber sizing agent and preparation method thereof, carbon fiber reinforced polypropylene composite material and preparation method of carbon fiber reinforced polypropylene composite material

A composite material, carbon fiber technology, applied in the direction of carbon fiber, fiber processing, textile and papermaking, etc., can solve the problems of limited interface performance and poor adhesion performance of small molecule silane coupling agents

Active Publication Date: 2018-02-16
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the small molecule silane coupling agent in the above method has poor adhesion performance and extremely limited improvement of interfacial performance.

Method used

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  • Carbon fiber sizing agent and preparation method thereof, carbon fiber reinforced polypropylene composite material and preparation method of carbon fiber reinforced polypropylene composite material
  • Carbon fiber sizing agent and preparation method thereof, carbon fiber reinforced polypropylene composite material and preparation method of carbon fiber reinforced polypropylene composite material
  • Carbon fiber sizing agent and preparation method thereof, carbon fiber reinforced polypropylene composite material and preparation method of carbon fiber reinforced polypropylene composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of sizing agent

[0037] (1) Under the condition of nitrogen protection and 30 DEG C, dodecene and maleic anhydride are dissolved in xylene according to the ratio of 1.0:1.0 substance amount;

[0038] (2) Add azobisisobutylcyanide, control the temperature at 80°C, stir at 200rpm, and react for 0.5 hours;

[0039] (3) Stir the solution with a high-speed shear dispersing emulsifier at a stirring speed of 500 rpm, add deionized water dropwise while stirring, continue stirring for 0.5 hours, and then spin evaporate the solution to remove acetone to obtain a polymer emulsion sizing agent.

[0040] Carbon fiber reinforced polypropylene composites were prepared as follows:

[0041] (4) Carbon fiber pretreatment: dip the carbon fiber in the sizing agent for 1 min at room temperature, and then dry it at 20° C. for 0.5 hour.

[0042] (5) Mixing: Add 100 parts of polypropylene, 3 parts of carbon fiber, 1010:0.1 part of antioxidant, and 1 part of chlorinated polyethyl...

Embodiment 2

[0046] Preparation of sizing agent

[0047] (1) Under nitrogen protection, under the condition of 30-70°C, dodecyne and maleic anhydride are dissolved in N, N dimethylformamide according to the ratio of substance amount of 1.0:2.0;

[0048] (2) Add benzoyl peroxide, control the temperature at 90°C, stir at 500rpm, and react for 3 hours;

[0049] (3) Stir the solution with a high-speed shear dispersing emulsifier at a stirring speed of 10,000 rpm, add deionized water dropwise while stirring, and continue stirring for 1.5 hours, then spin the solution to remove the organic solvent to obtain a polymer emulsion sizing agent.

[0050] Carbon fiber reinforced polypropylene composites were prepared as follows:

[0051] (4) Carbon fiber pretreatment: dip the carbon fiber in the sizing agent for 2 minutes at room temperature, and then dry it at 60°C for 40 minutes.

[0052] (5) Mixing: Add 100 parts of polypropylene, 11 parts of carbon fiber, 300:0.1 parts of antioxidant, and 5 parts...

Embodiment 3

[0057] Preparation of sizing agent

[0058] (1) under the condition of nitrogen protection and 50 DEG C, octadecene and maleic anhydride are dissolved in xylene according to the ratio of 1.0:0.8 substance amount;

[0059] (2) Add benzoyl peroxide, control the temperature at 90°C, stir at 600rpm, and react for 4 hours;

[0060] (3) Stir the solution with a high-speed shear dispersing emulsifier at a stirring speed of 3000 rpm, add deionized water dropwise while stirring, and continue stirring for 2 hours, then spin the solution to remove the organic solvent to obtain a polymer emulsion sizing agent.

[0061] Carbon fiber reinforced polypropylene composites were prepared as follows:

[0062] (4) Carbon fiber pretreatment: dip the carbon fiber in the sizing agent for 3 minutes at room temperature, and then dry it at 80°C for 1 hour.

[0063] (5) Mixing: Add 100 parts of polypropylene, 20 parts of carbon fiber, 1010:0.5 parts of antioxidant, and 2 parts of paraffin oil into the ...

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Abstract

The invention provides a carbon fiber sizing agent which is a copolymer emulsion of maleic anhydride and long-chain olefins and / or long-chain alkynes. The carbon fiber sizing agent has good adhesion properties, greatly shortens the impregnation time and plays a good bridging role between a carbon fiber and a polypropylene matrix, so as to further improve the mechanical properties of a composite material. The carbon fiber is pretreated by the carbon fiber sizing agent, and the prepared carbon fiber reinforced polypropylene composite material has excellent mechanical properties.

Description

technical field [0001] The invention relates to the technical field of carbon fiber composite materials, in particular to a carbon fiber sizing agent and a preparation method thereof, and a carbon fiber reinforced polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is a polymer material with low density, abundant raw materials, low price and wide application, which belongs to thermoplastic resin. However, the notched impact toughness of polypropylene is low, and the shrinkage rate is large, which leads to stress whitening of polypropylene under the influence of external force during use, which limits its wide application to a certain extent. Carbon fiber is an excellent material with high specific modulus, high specific strength, low density, high temperature resistance, and small thermal expansion coefficient. It is widely used in high-end fields such as aerospace and automobiles. [0003] By combining the adv...

Claims

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Application Information

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IPC IPC(8): D06M15/263D06M15/227C08F222/06C08F238/00C08F210/14C08L23/12C08L23/28C08L91/06C08L83/04C08K9/04C08K7/06C08K5/098D06M101/40
CPCC08F210/14C08F222/06C08F238/00C08K5/098C08K7/06C08K9/08C08L23/12D06M15/227D06M15/263D06M2101/40C08L23/286C08L91/06C08L83/04
Inventor 罗元聪雷彩红徐睿杰张笑晴
Owner GUANGDONG UNIV OF TECH
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