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Method for degrading epoxy resin carbon fiber composite material

A technology of epoxy resin and composite materials, applied in the direction of plastic recycling, recycling technology, etc., can solve the problems of high cost pressure, corrosion, harsh conditions, etc., and achieve the effect of less by-products, solving pollution, and easy process

Active Publication Date: 2013-08-07
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods either have harsh conditions and high temperature and pressure, which affects the industrialization of the process technology; or use strong oxidizing substances to decompose the thermosetting resin through oxidative degradation, which not only makes the oxidatively degraded resin monomer unable to be reused and the resin The synthesis of materials, and strong oxidizing substances will corrode and destroy the defect points on the surface of carbon fibers, affecting the strength of carbon fibers; or use a large amount of ionic liquids, and ionic liquids, which are expensive chemicals, will cause greater cost pressure , limiting its use in industrial

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Preparation of epoxy resin carbon fiber composite material: firstly, the epoxy resin AG-80 / DDS curing agent / acetone is uniformly mixed into a matrix solution at a weight ratio of 200:66.6:300; Solution for 10s, made into a unidirectional non-weft cloth and then placed at room temperature for 12h to completely volatilize the acetone in the glue. Cut the non-weft fabric according to the length and width of 60×40mm, and stack the cut non-weft fabric in one direction for 8-12 layers, so that the thickness of the composite material plate is kept at 2mm, then put the sample into the mold, and put the mold Put it in an autoclave; pre-cure at about 147°C for 25 minutes (and slowly inject air at about 90°C to pressurize to 7MPa); perform post-cure at 196°C for 2h, and the pressure in the autoclave is 6-8Mpa. Obtain epoxy resin carbon fiber composite material.

[0017] Degradation of epoxy resin carbon fiber composite material: Add 100 ml of zinc chloride aqueous solution with a...

Embodiment 2

[0019] Preparation of epoxy resin carbon fiber composite material: firstly, the epoxy resin AG-80 / DDS curing agent / acetone is uniformly mixed into a matrix solution with a weight ratio of 200:66.6:300; Solution for 10s, made into a unidirectional non-weft cloth and then placed at room temperature for 12h to completely volatilize the acetone in the glue. Cut the non-weft fabric according to the length and width of 60×40mm, and stack the cut non-weft fabric in one direction for 8-12 layers, so that the thickness of the composite material plate is kept at 2mm, then put the sample into the mold, and put the mold Put it in an autoclave; pre-cure at about 147°C for 25 minutes (and slowly inject air at about 90°C to pressurize to 7MPa); perform post-cure at 196°C for 2h, and the pressure in the autoclave is 6-8Mpa. Obtain epoxy resin carbon fiber composite material.

[0020] Degradation of epoxy resin carbon fiber composite material: 100 milliliters of mass fraction of 20% aluminum ...

Embodiment 3

[0022] Preparation of epoxy resin carbon fiber composite material: firstly, the epoxy resin AG-80 / DDS curing agent / acetone is uniformly mixed into a matrix solution at a weight ratio of 200:66.6:300; Solution for 10s, made into a unidirectional non-weft cloth and then placed at room temperature for 12h to completely volatilize the acetone in the glue. Cut the non-weft fabric according to the length and width of 60×40mm, and stack the cut non-weft fabric in one direction for 8-12 layers, so that the thickness of the composite material plate is kept at 2mm, then put the sample into the mold, and put the mold Put it in an autoclave; pre-cure at about 147°C for 25 minutes (and slowly inject air at about 90°C to pressurize to 7MPa); perform post-cure at 196°C for 2h, and the pressure in the autoclave is 6-8Mpa. Obtain epoxy resin carbon fiber composite material.

[0023] Degradation of epoxy resin carbon fiber composite material: Add 100 ml of zinc chloride aqueous solution with a...

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Abstract

The invention discloses a method for degrading an epoxy resin carbon fiber composite material. The method comprises the following steps of: preparing a reaction solution by adding a metal salt into water, methanol, ethanol or propanol which is taken as the solvent; dipping the epoxy resin carbon fiber composite material in the reaction solution, and carrying out degradation at 160-240 DEG C for 1-20 hours; and separating and recycling the metal salt and obtaining the epoxy resin degraded product and the carbon fiber. The method disclosed by the invention has the advantages of simple process, mild condition, low cost and low damage on carbon fiber strength.

Description

technical field [0001] The invention relates to a method for degrading epoxy resin carbon fiber composite materials. technical background [0002] Due to its stable physical and chemical properties, light weight, high strength and other excellent properties, carbon fiber / epoxy resin composite materials are widely used in many fields such as aerospace, electronic power, transportation, etc., and its demand is rising rapidly. The annual growth rate of global carbon fiber demand More than 12%, the global carbon fiber demand in 2008 was about 35,000 tons, and by 2014, the global carbon fiber demand is expected to reach 70,000 tons. However, with the continuous production and application of carbon fiber / epoxy resin composite materials, waste materials are also increasing, which brings heavy environmental pressure. Degrading carbon fiber / epoxy resin composites under relatively mild conditions, recycling carbon fibers to ensure that their strength is as small as possible, can not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/16C08L63/00C08K7/06
CPCY02W30/62
Inventor 侯相林刘影邓天昇
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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