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Ablation-resistant organic silicon modified epoxy resin-based carbon fiber composite material and preparation method thereof

The technology of epoxy resin and composite material is applied in the field of ablation-resistant silicone modified epoxy resin-based carbon fiber composite material and its preparation field, which can solve the problems of reduced mechanical properties, insufficiently dense carbon layer structure, poor effect and the like, Achieve the effect of good ablation resistance, excellent mechanical strength and density

Active Publication Date: 2020-12-11
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the ablation process includes violent melting, sublimation, and cracking, the carbon layer formed by existing partially ablation-resistant materials (such as epoxy resin-based materials) is usually highly uncertain, and the structure of the carbon layer is also uncertain. Not dense enough, leading to a significant reduction in the mechanical properties of the material after carbonization, which will greatly reduce the protection and support of the internal structure of the carbon layer after ablation
[0007] In the current literature reports, the mechanical properties after ablation are improved by adding heat-resistant fillers, such as graphite, silicon dioxide, and zirconium boride, but the effects are not good.

Method used

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  • Ablation-resistant organic silicon modified epoxy resin-based carbon fiber composite material and preparation method thereof
  • Ablation-resistant organic silicon modified epoxy resin-based carbon fiber composite material and preparation method thereof
  • Ablation-resistant organic silicon modified epoxy resin-based carbon fiber composite material and preparation method thereof

Examples

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preparation example Construction

[0066] The preparation methods of Examples 1-5 of the present invention are as follows:

[0067] 1. Preparation of silicone-modified epoxy resin matrix (ie, methoxy-terminated silicone-modified prepolymer):

[0068] (1) Modification of o-allyl phenol to phenyl hydrogen-containing silicone oil

[0069] Add o-allyl phenol (AP) and phenyl hydrogen-containing silicone oil (UC-233) into a three-necked flask according to the proportion, raise the temperature to 55 ° C, pass argon to remove the air in the flask, and stir the pre-reactant. Homogeneous, then add 30 μL of platinic acid catalyst, and react for 1 h to obtain phenolic hydroxyl-containing phenyl silicone oil (UAP).

[0070] (2) Preparation of pre-reacted phenyl hydrogen-containing silicone oil modified epoxy resin (EUAP)

[0071] The reaction phenyl hydrogen silicone oil (UAP) was added to the epoxy resin (E51) in proportion, the temperature was raised to 110 ° C, argon was introduced and the pre-reactant was stirred unif...

Embodiment 1

[0086] In this embodiment, the dosage of epoxy resin (E51) is 100g; the dosage of phenyl hydrogen silicone oil (UC-233) is 6.91g; the dosage of o-allylphenol (AP) is 2.09g; The dosage of -S) is 0g; the dosage of curing agent MOCA is 40g; the dosage of carbon fiber cloth is 8 layers, and the size is 20×20mm. The carbon fiber composite material obtained in this example is referred to as EUPF-0 in the test example.

Embodiment 2

[0088] In this embodiment, the dosage of epoxy resin (E51) is 100g; the dosage of phenyl hydrogen silicone oil (UC-233) is 6.91g; the dosage of o-allylphenol (AP) is 2.09g; The dosage of -S) is 10g; the dosage of curing agent MOCA is 40g; the dosage of carbon fiber cloth is 8 layers, and the size is 20×20mm. The carbon fiber composite material obtained in this example is referred to as EUPF-10 in the test example.

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Abstract

The invention belongs to the field of polymer composite materials, and relates to an ablation-resistant organic silicon modified epoxy resin-based carbon fiber composite material and a preparation method thereof. The methoxy-terminated organic silicon modified epoxy resin is epoxy resin modified by methoxy-terminated organic silicon. The ablation-resistant organic silicon modified epoxy resin-based carbon fiber composite material is a carbon fiber reinforced methoxy-terminated organic silicon modified epoxy resin composite material and is prepared from carbon fiber cloth, methoxy-terminated organic silicon modified epoxy resin and a curing agent. The composite material has the properties of high temperature resistance and ablation resistance, and a carbon layer structure formed after ablation still has good mechanical properties so that the composite material has a very good application prospect in the field of integration of low-cost ablation-resistant composite materials and structure ablation; the material can be applied to the fields of preparation of aerospace craft shell materials, ablation heat-proof structures of aerospace equipment such as high-speed aircrafts, airships and return satellites in near space and atmosphere, and civil use.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, in particular to an ablation-resistant organosilicon modified epoxy resin-based carbon fiber composite material and a preparation method thereof. Background technique [0002] Due to the extremely harsh environment of aerospace equipment such as spacecraft, aircraft, and returnable satellites, there are very high requirements for the ablation resistance, heat-resistant flow erosion and mechanical properties of the heat-resistant layer. The mechanism of the ablation resistance of the heat-resistant layer is that after the ablation-resistant material is heated, it is difficult to conduct heat into the material due to its low thermal conductivity. This causes the surface temperature of the material to rise rapidly. Under the action of high temperature, low molecular weight substances and moisture in the material volatilize, while the polymer melts, sublimates and decomposes. Ul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L83/04C08L83/05C08K7/06C08J5/24
CPCC08J5/24C08J2363/00C08J2483/04C08L63/00C08L2205/025C08L2205/03C08L83/04C08K7/06
Inventor 邹华维另友权陈洋
Owner SICHUAN UNIV
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