Modified carbon fiber reinforced phenolic resin-based composite material and preparation thereof

A phenolic resin and fiber reinforcement technology is applied in the field of modified carbon fiber reinforced phenolic resin-based composite materials and their preparation, which can solve problems such as mechanical properties decline, and achieve good formability, low cost, good interface bonding performance and anti-oxidative burning. effect of corrosion

Active Publication Date: 2020-03-31
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Srikanth et al. used inorganic zirconium sol to coat the surface of carbon fiber cloth and prepared composite materials. The anti-oxidation and ablation performance of the prepared composite materials was improved, but the mechanical properties decreased.

Method used

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  • Modified carbon fiber reinforced phenolic resin-based composite material and preparation thereof
  • Modified carbon fiber reinforced phenolic resin-based composite material and preparation thereof
  • Modified carbon fiber reinforced phenolic resin-based composite material and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The specific preparation steps of a modified carbon fiber reinforced phenolic resin-based composite material are as follows:

[0033] (1) Add 20mL of 3-aminopropyltriethoxysilane, 33mL of zirconium n-propoxide solution and 10mL of absolute ethanol into the flask, then heat the flask in an oil bath and reflux at 110°C for 20h, After standing and aging for 5 hours, an organic-inorganic hybrid zirconium silicate sol was obtained;

[0034] (2) Place 70g of carbon fiber cloth in an inert atmosphere (argon) at 800°C for desizing treatment, and then oxidize the carbon fiber cloth with nitric acid (60wt%) at 80°C for 2 hours, and then wash it with deionized water To PH=7, then dry to obtain a carbon fiber cloth with -COOH on the surface;

[0035] (3) The organic-inorganic hybrid zirconium silicate sol obtained in step (1) is oxidized in step (2) according to the mass ratio of organic-inorganic hybrid zirconium silicate sol and carbon fiber cloth by air spraying The two surfac...

Embodiment 2

[0042] The specific preparation steps of a modified carbon fiber reinforced phenolic resin-based composite material are as follows:

[0043] (1) Add 30mL of γ-glycidyl etheroxypropyltrimethoxysilane, 51mL of zirconium n-propoxide solution and 10mL of absolute ethanol into the flask, then heat the flask in an oil bath, and reflux at 110°C for 20h , after standing and aging for 5 hours, an organic-inorganic hybrid zirconium silicate sol was obtained;

[0044] (2) Place 70g of carbon fiber cloth in an inert atmosphere (argon) at 800°C for desizing treatment, and then oxidize the carbon fiber cloth with nitric acid (60wt%) at 80°C for 2 hours, and then wash it with deionized water To PH=7, then dry to obtain a carbon fiber cloth with -COOH on the surface;

[0045] (3) The organic-inorganic hybrid zirconium silicate sol obtained in step (1) is oxidized in step (2) according to the mass ratio of organic-inorganic hybrid zirconium silicate sol and carbon fiber cloth by air spraying ...

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Abstract

The invention relates to a modified carbon fiber reinforced phenolic resin-based composite material and preparation thereof, and belongs to the technical field of resin-based composite materials. Thepreparation method comprises the following steps of: coating the surface of carbon fiber cloth with an organic-inorganic hybrid zirconium silicate sol coating, dipping the carbon fiber cloth in phenolic resin, and carrying out curing molding to prepare a composite material, wherein due to the existence of the organic-inorganic hybrid zirconium silicate sol, the compatibility between the carbon fiber and the phenolic resin is effectively improved, the interface problem is optimized, the mechanical property of the composite material is improved, and a ceramic layer formed by decomposing the organic-inorganic hybrid zirconium silicate sol in a high-temperature ablation environment can effectively prevent oxygen and heat flow from entering, so that the oxidation ablation resistance of the composite material is improved. The composite material provided by the invention has good interface bonding performance and oxidation ablation resistance, can meet ablation thermal protection requirementsunder high-temperature and high-speed combustion flow service conditions, and has the advantages of the simple preparation method, the low cost and the good application prospect.

Description

technical field [0001] The invention relates to a modified carbon fiber reinforced phenolic resin-based composite material and its preparation, belonging to the technical field of resin-based composite materials. Background technique [0002] Carbon fiber reinforced phenolic resin composites (C-Ph) are widely used as materials for thermal protection systems (TPSs) in the aerospace field due to their light weight, good thermal stability and high mechanical properties. However, the interfacial bonding between the carbon fiber reinforcement and the phenolic resin matrix, as a key factor determining the overall performance of the composite material, directly affects the mechanical properties and oxidation ablation resistance of the composite material in a high-temperature service environment. At present, for the interface problem of carbon fiber reinforced phenolic resin composites, it is an effective method to use carbon fiber surface modification to realize its interface optim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/06C08K9/02C08K9/06C08K7/06
CPCC08K7/06C08K9/02C08K9/06C08L2201/02C08L2201/08C08L61/06
Inventor 朱时珍柳彦博马壮许峰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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