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Preparation method of fiber-reinforced phenolic resin composite material and fiber-reinforced phenolic resin composite material

A phenolic resin and composite material technology, which is applied in the preparation of fiber-reinforced phenolic resin composite materials and the field of fiber-reinforced phenolic resin composite materials, can solve the problems of reducing material density, strong rigidity and poor flexibility, and achieves improved flexibility and low cost. , Improve the effect of strong rigidity

Active Publication Date: 2021-02-05
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The second object of the present invention is to provide the product prepared by the method for preparing the fiber-reinforced phenolic resin composite material, aiming to improve the rigidity and poor flexibility of the traditional fiber-reinforced phenolic resin composite material and reduce the material density

Method used

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  • Preparation method of fiber-reinforced phenolic resin composite material and fiber-reinforced phenolic resin composite material
  • Preparation method of fiber-reinforced phenolic resin composite material and fiber-reinforced phenolic resin composite material
  • Preparation method of fiber-reinforced phenolic resin composite material and fiber-reinforced phenolic resin composite material

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preparation example Construction

[0035] According to the first aspect of the present invention, the present invention provides a kind of preparation method of fiber-reinforced phenolic resin composite material, comprises the following steps:

[0036] Step A: prepare toughening agent solution and phenolic resin solution;

[0037] Step B: pre-impregnating the fiber mat with the toughening agent solution, drying and curing to obtain the toughening agent modified fiber mat;

[0038] Step C: impregnating the toughening agent-modified fiber mat with a phenolic resin solution, and drying to obtain a fiber-reinforced phenolic resin composite material.

[0039] Phenolic resin refers to a high polymer obtained by polycondensation of phenol and aldehyde or its derivatives. The most important feature of phenolic resin is high temperature resistance, even at very high temperatures, it can maintain its structural integrity and dimensional stability. It is for this reason that phenolic resins are used in some high-tempera...

Embodiment 1

[0086] This embodiment provides a carbon fiber reinforced phenolic resin composite material, specifically comprising the following steps:

[0087] (1) Cut a carbon fiber felt with a thickness of 10mm into a size of 150*150mm, place it in an oven at 80°C to dry for a certain period of time, take it out, and place it in a stainless steel mold; weigh a certain amount of natural rubber latex, and prepare a natural rubber latex with a mass concentration of 2%. The rubber solution was poured into a stainless steel mold, and the carbon fiber felt was pre-impregnated under normal pressure; after full impregnation, the mold was placed in an oven at 80°C, and after drying and curing for 12 hours, a natural rubber modified carbon fiber felt was obtained.

[0088] (2) Weigh a certain amount of phenolic resin, hexamethylenetetramine and boric acid respectively, add them into a reaction kettle containing a certain amount of isopropanol solvent, and stir mechanically until completely dissolve...

Embodiment 2

[0090] This embodiment provides a carbon fiber reinforced phenolic resin composite material, specifically comprising the following steps:

[0091] (1) Cut a carbon fiber felt with a thickness of 10mm into a size of 150*150mm, place it in an oven at 80°C to dry for a certain period of time, take it out, and place it in a stainless steel mold; weigh a certain amount of natural rubber latex, and prepare a natural rubber latex with a mass concentration of 4%. The rubber solution was poured into a stainless steel mold, and the carbon fiber felt was pre-impregnated under normal pressure; after full impregnation, the mold was placed in an oven at 80°C, and after drying and curing for 12 hours, a natural rubber modified carbon fiber felt was obtained.

[0092] (2) Weigh a certain amount of phenolic resin, hexamethylenetetramine and boric acid respectively, add them into a reaction kettle containing a certain amount of isopropanol solvent, and stir mechanically until completely dissolve...

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Abstract

The invention relates to the technical field of phenolic resin composite materials, and in particular relates to a preparation method of a fiber-reinforced phenolic resin composite material and the fiber-reinforced phenolic resin composite material. The preparation method of the fiber-reinforced phenolic resin composite material provided by the invention comprises the following steps: firstly, preparing a toughening agent solution and a phenolic resin solution, then carrying out pre-impregnation treatment on fibrofelt by using the toughening agent solution, drying and curing to obtain toughening agent modified fibrofelt, and finally, impregnating the toughening agent modified fibrofelt by using the phenolic resin solution, and drying to obtain the fiber-reinforced phenolic resin compositematerial. The fiber-reinforced phenolic resin composite material overcomes the defects of strong rigidity and poor flexibility of the traditional fiber-reinforced phenolic composite material, the material density is reduced, and the preparation method has the advantages of low equipment complexity requirement, easy operation, stable process and high production efficiency, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of phenolic resin composite materials, in particular to a preparation method of a fiber-reinforced phenolic resin composite material and the fiber-reinforced phenolic resin composite material. Background technique [0002] Fiber-reinforced phenolic resin composites are a class of thermal protection materials with excellent ablation resistance, and are widely used in thermal protection systems for hypersonic vehicles and space probes. However, traditional fiber-reinforced phenolic composites have high density and cannot meet the lightweight requirements of aerospace vehicles. At the same time, traditional fiber-reinforced phenolic composite materials have strong rigidity and poor flexibility. On the one hand, they are not conducive to the design and assembly of large-area thermal protection systems; Therefore, the development of a lightweight and flexible thermal protection material is of great significance ...

Claims

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Application Information

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IPC IPC(8): C08L61/06C08K9/04C08K7/06C08K7/10
CPCC08K9/08C08K7/06C08K7/10C08L61/06
Inventor 贾献峰马成王际童乔文明凌立成
Owner EAST CHINA UNIV OF SCI & TECH
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