Modified silicon carbide sizing agent for improving wave-absorbing property of carbon fiber and preparation method of modified silicon carbide sizing agent

A wave-absorbing performance, silicon carbide technology, applied in the direction of carbon fiber, fiber processing, textile/flexible product manufacturing, etc., can solve the problems of reducing the overall mechanical properties of carbon fiber composite materials, unfavorable interface bonding of resin composite materials, and high brittleness of carbon fiber, etc., to achieve Good interfacial compatibility, excellent wave-absorbing performance, and the effect of enhancing the resistance to heat and humidity

Pending Publication Date: 2022-05-27
江苏亨睿航空工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) Poor bonding: Ordinary carbon fiber itself is brittle and has serious static electricity, and is not easy to bundle during production, weaving and transportation, and is prone to hairs or even breakage; in addition, the surface of carbon fiber is smooth and the surface energy is low, which is not conducive to the infiltration of resin Combined with the interface of composite materials;
[0004] (2) Poor wave absorption: For carbon fiber composite materials used in aerospace, military and other fields, there are corresponding requirements on how to improve the electromagnetic shielding ability while ensuring product performance
The above methods will reduce the overall mechanical properties of carbon fiber composite materials to a certain extent.

Method used

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  • Modified silicon carbide sizing agent for improving wave-absorbing property of carbon fiber and preparation method of modified silicon carbide sizing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A modified sizing agent for improving the wave-absorbing properties of carbon fibers, which is composed of the following components:

[0026] Modified silicon carbide, 3.6wt%;

[0027] Emulsifier, 12.05wt%;

[0028] Alcohol, 64.11wt%;

[0029] Thermosetting resin, 20.24 wt%.

[0030] The preparation method of the modified silicon carbide sizing agent comprises the following steps:

[0031] Step 1, preparing an emulsifier: mixing 40 wt% sorbitan monostearate, 40 wt% polyoxyethylene sorbitan monooleate, and 20 wt% sodium dodecylbenzenesulfonate;

[0032] Step 2, preparing silicon carbide modifier: adding 62.5wt% of silane coupling agent into a mixed solution consisting of 28.1wt% absolute ethanol and 9.4wt% hydrolysis agent to obtain silicon carbide modifier; the silane coupling agent The coupling agent is a commercially available product, and the specific model is silane coupling agent M611.

[0033] Step 3: Preparation of modified silicon carbide: The silicon carbi...

Embodiment 2

[0037] A modified sizing agent for improving the wave-absorbing properties of carbon fibers, which is composed of the following components:

[0038] Modified silicon carbide, 10wt%;

[0039] Emulsifier, 11.25wt%;

[0040] Alcohol, 59.85wt%;

[0041] Thermosetting resin, 18.9 wt%.

[0042] The preparation method of the modified silicon carbide sizing agent comprises the following steps:

[0043] Step 1, preparing an emulsifier: mixing 40 wt% sorbitan monostearate, 40 wt% polyoxyethylene sorbitan monooleate, and 20 wt% sodium dodecylbenzenesulfonate;

[0044] Step 2, preparing silicon carbide modifier: adding 62.5wt% of silane coupling agent into a mixed solution consisting of 28.1wt% absolute ethanol and 9.4wt% hydrolysis agent to obtain silicon carbide modifier; the silane coupling agent The coupling agent is a commercially available product, and the specific model is silane coupling agent M611.

[0045] Step 3: Preparation of modified silicon carbide: The silicon carbide...

Embodiment 3

[0049] A modified sizing agent for improving the wave-absorbing properties of carbon fibers, which is composed of the following components:

[0050] Modified silicon carbide, 3.6wt%;

[0051] Emulsifier, 12.05wt%;

[0052] Alcohol, 64.11wt%;

[0053] Thermosetting resin, 20.24 wt%.

[0054] The preparation method of the modified silicon carbide sizing agent comprises the following steps:

[0055] Step 1. Prepare emulsifier: mix 40 wt% sorbitan monostearate, 40 wt% polyoxyethylene sorbitan monooleate, and 20 wt% sodium dodecylbenzenesulfonate;

[0056] Step 2, preparing silicon carbide modifier: adding 20wt% silane coupling agent into a mixed solution consisting of 70wt% absolute ethanol and 10wt% hydrolyzing agent to obtain a silicon carbide modifier; the silane coupling agent It is a commercially available product, and the specific model is silane coupling agent M611.

[0057] Step 3: Preparation of modified silicon carbide: The silicon carbide and the silicon carbide mo...

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Abstract

The invention discloses a modified silicon carbide sizing agent for improving the wave-absorbing performance of carbon fibers and a preparation method thereof.The sizing agent is composed of, by weight, 0.1-10% of modified silicon carbide, 10-20% of an emulsifier, 40-70% of alcohol and 10-40% of thermosetting resin, the sizing agent can be directly used for the carbon fibers, and the sizing agent can be applied to the carbon fibers. On the basis of improving the binding property of the carbon fibers, the carbon fibers have certain wave-absorbing property, so that the carbon fiber composite material product has wave-absorbing property.

Description

technical field [0001] The invention belongs to the production field of carbon fiber composite materials, in particular to a modified silicon carbide sizing agent for improving the wave-absorbing performance of carbon fibers and a preparation method thereof. Background technique [0002] Carbon fiber has the characteristics of high temperature resistance, light weight, high strength and high modulus, and has excellent reinforcement and toughening effect. Therefore, the use of carbon fiber reinforced composite materials can effectively achieve the purpose of reducing weight and improving mechanical properties. Common carbon fiber reinforced resin-based Prepreg has been widely concerned and applied in aerospace and military products. At present, the development trend of composite materials is the integration of structure and function. Carbon fiber reinforced composite materials have excellent mechanical properties, but average functional properties. Specifically reflected in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/77D06M15/55D06M15/41D06M15/423D06M15/19D06M101/40
CPCD06M11/77D06M15/55D06M15/41D06M15/423D06M15/19D06M2101/40Y02P70/62
Inventor 顾勇涛吴昕远张雄李宁岳海亮
Owner 江苏亨睿航空工业有限公司
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