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Recovery method of fiber reinforced composite material

A composite material, fiber reinforced technology, applied in the field of fiber reinforced composite material degradation and recycling

Inactive Publication Date: 2020-05-19
ADESSO ADVANCED MATERIALS WUXI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at many problems existing in the separation and recovery technology of fiber reinforced materials, the present invention provides a method for recycling fiber reinforced composite materials to solve the above problems

Method used

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  • Recovery method of fiber reinforced composite material
  • Recovery method of fiber reinforced composite material
  • Recovery method of fiber reinforced composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The leftover material of the fiber reinforced composite material is prepared from fiber and epoxy resin, wherein the fiber is carbon fiber; the epoxy resin is glycidyl ether epoxy resin. The leftovers of fiber-reinforced composite materials were crushed into uniform fragments with a particle size of 3 cm using a commercially available crusher before degradation.

[0035] Add 1 gram of carbon fiber composite material fragments, 0.5 gram of formic acid as an organic catalyst and 15 grams of toluene as an organic solvent in a three-necked flask, start the stirrer to stir, heat the water bath to 110 ° C for 1 hour, and then slowly drop 10 grams of 5% Aqueous hydrogen peroxide solution, degradation reaction for 12 hours, cooling after the end of the reaction, filtering solid-liquid separation to obtain solid intermediate product carbon fiber and liquid intermediate product degradation liquid; the solid intermediate product obtained was washed with water, dried and separated t...

Embodiment 2

[0037] The leftover material of the fiber reinforced composite material is prepared from fiber and epoxy resin, wherein the fiber is glass fiber; the epoxy resin is glycidyl ester epoxy resin. The leftovers of fiber-reinforced composite materials were crushed into uniform fragments with a particle size of 5 cm using a commercially available crusher before degradation.

[0038] Add 1 gram of carbon fiber composite material fragments and 15.5 grams of formic acid to the three-necked flask, which has the dual functions of organic catalyst and organic solvent, start the stirrer to stir, heat the water bath to 100 ° C for 1 hour, and then slowly drop 10 grams of 40% formic acid Aqueous hydrogen peroxide solution, degraded reaction for 10 hours, cooled after the reaction, filtered solid-liquid separation, and obtained solid intermediate product carbon fiber and liquid intermediate product degradation liquid; the obtained solid intermediate product was washed with water, dried and sep...

Embodiment 3

[0040] The leftover material of the fiber reinforced composite material is prepared from fiber and epoxy resin, wherein the fiber is aramid fiber, and the epoxy resin is glycidyl amine epoxy resin. The leftovers of fiber-reinforced composite materials were crushed into uniform fragments with a particle size of 4 cm using a commercially available crusher before degradation.

[0041]Add 1 gram of carbon fiber composite material fragments and 15.5 grams of acetic acid to the three-necked flask, which has the dual functions of an organic catalyst and an organic solvent, start the stirrer to stir, heat the water bath to 115 ° C for 1 hour, and then slowly drop 10 grams of 30% acetic acid Aqueous hydrogen peroxide solution, degradation reaction for 6 hours, cooling after the reaction, filtering solid-liquid separation, obtaining solid intermediate product carbon fiber and liquid intermediate product degradation liquid; washing the obtained solid intermediate product with water, separ...

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Abstract

The invention discloses a recovery method of a fiber reinforced composite material. The fiber reinforced composite material is catalytically oxidized through an organic catalyst to depolymerize thermosetting epoxy resin into thermoplastic linear macromolecules and rapidly dissolve the thermoplastic linear macromolecules in an organic solvent, so that the fiber material and the thermoplastic polymer are separated and recovered. The method disclosed by the invention has the advantages of mild degradation conditions, simple process operation, small amount of three wastes, environmental friendliness and the like, and is a green method for recycling the fiber reinforced composite material.

Description

technical field [0001] The invention relates to the technical field of degradation and recovery of fiber-reinforced composite materials, in particular to a method for recycling fiber-reinforced composite materials. Background technique [0002] Carbon fiber is a high-tech, high-value-added product with incomparable excellent performance from other materials. Since its commercialization, its application scope has gradually penetrated from the initial aerospace and military departments to civilian fields, and has now expanded to the entire industrial and civilian fields. kind of field. [0003] Carbon fiber composite waste is a general term for carbon fiber, carbon fiber prepreg and carbon fiber composite waste. As carbon fiber composite materials become more and more popular in people's lives, carbon fiber products gradually increase, and the disposal of carbon fiber composite waste has become an inevitable problem. At present, the processing technology of carbon fiber comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/08C08J11/16C08J11/26C08J11/22C08L63/00C08K7/14C08K7/06
CPCC08J11/08C08J11/16C08J11/26C08J11/22C08J2363/00C08K7/06C08K7/14Y02W30/62
Inventor 黄永升南江琨覃兵孙小涛杨涛
Owner ADESSO ADVANCED MATERIALS WUXI CO LTD
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