Method for modifying carbon fiber composite material by cryogenic treatment

A technology of cryogenic treatment and composite materials, applied in the field of modification of high-performance fiber composite materials, to achieve the effects of enhanced adhesion, convenient operation, and good development prospects

Inactive Publication Date: 2014-12-24
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] So far, there have been few reports on the application of cryogenic treatment to the modification of carbon fiber composites.

Method used

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  • Method for modifying carbon fiber composite material by cryogenic treatment
  • Method for modifying carbon fiber composite material by cryogenic treatment
  • Method for modifying carbon fiber composite material by cryogenic treatment

Examples

Experimental program
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Embodiment 1

[0029] A method for modifying carbon fiber composite material by cryogenic treatment, the carbon fiber composite material is a carbon fiber (T300) non-woven felt reinforced unsaturated polyester resin composite material, which includes a matrix resin and is used as a reinforcement in the matrix resin The carbon fiber of the body, the volume ratio of the matrix resin and carbon fiber is 50:50, the matrix resin is unsaturated polyester, and the carbon fiber is T300, which is set in the matrix resin in the form of a two-dimensional non-woven fabric. The carbon fiber composite material is self-prepared, the carbon fiber is T300 fiber, the length is 3 cm to 6 cm, and the diameter of fiber filament is 6 microns; fabric structure: needle-punched non-woven felt; unsaturated polyester resin grade: 901-VP.

[0030] The preparation method adopts the vacuum-assisted resin transfer molding method. The preparation method adopts the vacuum-assisted resin transfer molding method. The specific ...

Embodiment 2

[0036] A method for modifying carbon fiber composite material by cryogenic treatment, the carbon fiber composite material is a two-dimensional carbon fiber (T300) woven fabric reinforced epoxy resin composite material, which includes a matrix resin and a reinforcement set in the matrix resin as a reinforcement Carbon fiber, the weight ratio of the matrix resin to carbon fiber is 55:45, the matrix resin is epoxy resin, and the carbon fiber is T300, which is arranged in the matrix resin in the form of carbon fiber two-dimensional fabric. The carbon fiber composite material is self-prepared, carbon fiber fabric parameters: T300 fibers with warp and weft yarn specifications of 12K, warp and weft density of 5 threads / cm, fabric structure: two-dimensional plain weave fabric; epoxy resin grade: JL-235. The preparation method adopts the vacuum-assisted resin transfer molding method, and the specific steps are the same as in Example 1. Composite material sample size is: length 30 cm, w...

Embodiment 3

[0042] A method for modifying carbon fiber composite material by cryogenic treatment, the carbon fiber composite material is a two-dimensional carbon fiber (T700) woven fabric reinforced epoxy resin composite material, which includes a matrix resin and a matrix resin used as a reinforcement For carbon fiber, the volume ratio of the matrix resin and carbon fiber is 55:45. The matrix resin is epoxy resin, and the carbon fiber is T700, which is set in the matrix resin in the form of carbon fiber two-dimensional fabric. The carbon fiber composite material is self-prepared, carbon fiber fabric parameters: T700 fiber (model: T700SC-12000-50C) with warp and weft thickness of 12K, warp and weft density of 5 threads / cm, fabric structure: two-dimensional plain weave fabric; epoxy Resin grade: JL-235. The preparation method adopts the vacuum-assisted resin transfer molding method, and the specific steps are as described in Example 1. Composite material sample size is: length 30 cm, wid...

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Abstract

The invention provides a method for modifying a carbon fiber composite material by cryogenic treatment. The method is characterized by comprising the following specific steps: putting a carbon fiber composite material sample into a cryogenic treatment device with a cryogenic medium, closing a container and performing cryogenic treatment, wherein the treatment temperature is constant temperature and at -100 DEG C to -200 DEG C and the treatment time is 1h-15h; and increasing the temperature through a program for temperature returning or taking the sample out of the cryogenic treatment device for natural temperature returning after cryogenic treatment. As resin has a larger shrinkage rate than carbon fiber under cryogenic conditions, the cohesion pressure between the resin and fiber is increased and an interfacial effect is strengthened. Thus, the carbon fiber composite material has high tensile property, bending property, interlaminar shear property, wear resistance property and other comprehensive properties. The process method provided by the invention is simple, convenient to operate and pollution-free and has important practical significance and industrial application prospects.

Description

technical field [0001] The invention relates to a modification method for performing cryogenic treatment on carbon fiber composite materials to improve its comprehensive performance, and belongs to the field of modification of high-performance fiber composite materials. Background technique [0002] Carbon fiber has the characteristics of general carbon materials, such as high temperature resistance, friction resistance, electrical conductivity, heat conduction and corrosion resistance, etc., but different from general carbon materials, its shape has significant anisotropy, softness, and can be processed into various The fabric exhibits high strength along the fiber axis. Carbon fiber has a small specific gravity, so it has a high specific strength. The main purpose of carbon fiber is to compound with resin, metal, ceramics and other substrates to make structural materials. Due to its high strength (5 times that of steel), excellent heat resistance (can withstand high temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/00C08K7/06C08K3/04C08L63/00C08L67/06C08L79/08C08L75/04C08L23/12C08L81/02C08L27/06C08L69/00
Inventor 许福军张荫楠陈枫邱夷平
Owner DONGHUA UNIV
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