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Carbon fiber modified polysilazane composite material for fire fighting helmet and preparation method thereof

A technology of polysilazane and composite materials, which is applied in the field of carbon fiber modified polysilazane composite materials and its preparation for fire helmets, achieving good application prospects, moderate penetration, and improved mechanical properties

Active Publication Date: 2022-04-05
SHANGHAI ZANRAY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there are very few studies on carbon fiber reinforced modified polysilazane composite materials, especially the mechanical properties of modified composite materials, coating Adhesive properties are crucial to the modification effect and should be paid special attention

Method used

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  • Carbon fiber modified polysilazane composite material for fire fighting helmet and preparation method thereof
  • Carbon fiber modified polysilazane composite material for fire fighting helmet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A carbon fiber modified polysilazane composite material, which includes a matrix and a reinforcement, the matrix is ​​a mixture of silica airgel and polysilazane; the reinforcement is a copolymer of carbon fiber and styrene-vinyl fluoride mixture of things. The styrene-fluoroethylene copolymer is polystyrene-poly 2,3,4,5,6-pentafluorostyrene copolymer. Wherein, the mass ratio of the mixture of silica airgel and polysilazane as the matrix to the mixture of carbon fiber and styrene-fluoroethylene copolymer as the reinforcement is 100:100.

[0026] The mixture of silica airgel and polysilazane is prepared by the following method: adding the mixture of polysilazane, methyltriethoxysilane and ethyl orthosilicate to the ethanol solution, and adjusting the pH The value is 5, and supercritical carbon dioxide is introduced to react, and then supercritical drying is carried out to obtain the matrix.

[0027] The mixture of carbon fiber and styrene-fluoroethylene copolymer is pr...

Embodiment 2

[0030] A carbon fiber modified polysilazane composite material, which includes a matrix and a reinforcement, the matrix is ​​a mixture of silica airgel and polysilazane; the reinforcement is a copolymer of carbon fiber and styrene-vinyl fluoride mixture of things. Styrene-fluoroethylene copolymer is polystyrene-poly-3-fluorostyrene copolymer. Wherein, the mass ratio of the mixture of silica airgel and polysilazane as the matrix to the mixture of carbon fiber and styrene-fluoroethylene copolymer as the reinforcement is 100:50.

[0031] The mixture of silica airgel and polysilazane is prepared by the following method: adding the mixture of polysilazane, methyltriethoxysilane and ethyl orthosilicate to the ethanol solution, and adjusting the pH The value is 4, and supercritical carbon dioxide is introduced to react, and then supercritical drying is carried out to obtain the matrix.

[0032] The mixture of carbon fiber and styrene-fluoroethylene copolymer is prepared by the foll...

Embodiment 3

[0035] A carbon fiber modified polysilazane composite material, which includes a matrix and a reinforcement, the matrix is ​​a mixture of silica airgel and polysilazane; the reinforcement is a copolymer of carbon fiber and styrene-vinyl fluoride mixture of things. The styrene-fluoroethylene copolymer is polystyrene-poly1,2,2-trifluorostyrene. Wherein, the mass ratio of the mixture of silica airgel and polysilazane as the matrix to the mixture of carbon fiber and styrene-fluoroethylene copolymer as the reinforcement is 100:80.

[0036] The mixture of silica airgel and polysilazane is prepared by the following method: adding the mixture of polysilazane, methyltriethoxysilane and ethyl orthosilicate to methanol solution, adjusting the pH The value is 5, and supercritical carbon dioxide is introduced to react, and then supercritical drying is carried out to obtain the matrix.

[0037] The mixture of carbon fiber and styrene-fluoroethylene copolymer is prepared by the following m...

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Abstract

The invention discloses a carbon fiber modified polysilazane composite material for a fire fighting helmet and a preparation method thereof. The composite material comprises a matrix and a reinforcement body, wherein the matrix is a mixture of silicon dioxide aerogel and polysilazane; the reinforcing body is a mixture of carbon fibers and a styrene-vinyl fluoride copolymer. The polysilazane is reinforced and modified by the carbon fibers, so that the high-temperature mechanical property of the material is greatly improved, the high-temperature resistance and the fireproof performance are also greatly improved, and a surface coating does not crack or fall off in air, is high in bonding strength and has a good application prospect.

Description

technical field [0001] The invention relates to the field of composite material preparation, in particular to a carbon fiber modified polysilazane composite material for a fire helmet and a preparation method thereof. Background technique [0002] Silazane polymer, namely polysilazane, is a kind of inorganic polymer with Si-N bond as the main chain. Due to its special chemical structure, it can be transformed into SiCN, SiCNO or silica ceramics under high temperature conditions. Therefore, silazane polymers have important application value in high temperature resistant coatings and fireproof materials. However, polysilazane is an inorganic ceramic polymer. Direct coating on the surface of the fiber substrate will cause the coating to fall off easily, which cannot fully cover and protect the fiber. Once it falls off, it will cause hidden dangers in safety. And because polysilazane has been treated at high temperature, its surface active functional groups are less, and its we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/16C08L25/08C08K7/26C08K7/06
Inventor 俞川华王康张锐张佩林王安平
Owner SHANGHAI ZANRAY IND
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