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Electrodegradation recovery method of carbon fiber reinforced composite material

A technology of reinforced composite materials and recycling methods, which is applied in the field of electrodegradation and recycling of carbon fiber reinforced composite materials, to achieve the effects of environment optimization, simple process operation, and improved catalytic oxidation efficiency

Inactive Publication Date: 2020-11-27
ADESSO ADVANCED MATERIALS WUXI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Technical problem to be solved by the present invention: The present invention provides an electrolytic recycling method for fiber reinforced composite materials to solve many problems existing in the efficient and environmentally friendly recycling process of existing carbon fiber reinforced composite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The resin raw material in carbon fiber reinforced composite materials is glycidyl ether epoxy resin.

[0033] In this embodiment, salts are used as the ionic compound, specifically sodium chloride, and acetic acid is used as the organic solvent.

[0034] Weigh 10 grams of sodium chloride, 100 grams of deionized water, and 150 grams of acetic acid and mix them into the electrolysis tank; weigh 2 grams of the complete carbon fiber reinforced composite material as the anode, and place the stainless steel iron sheet as the cathode in the electrolysis tank And connect a DC power supply; raise the temperature to 50°C, turn on the power supply, the constant voltage at both ends of the electro-degradation tank is 10V, and the temperature of electro-degradation is a constant temperature of 50°C, so that the resin base in the carbon fiber reinforced composite material used as the anode is electrochemically oxidized. After 40 hours, the electro-degradation solution was filtered, a...

Embodiment 2

[0036] The resin raw material in carbon fiber reinforced composite materials is glycidyl ester epoxy resin.

[0037] The ionic compound used in this embodiment is acid, specifically hydrochloric acid, and organic solvent ethylene glycol.

[0038] Weigh 10 grams of hydrochloric acid with a concentration of 37%, 100 grams of deionized water, and 150 grams of ethylene glycol and mix them into the electrolysis tank; weigh 2 grams of the complete carbon fiber reinforced composite material as the anode, and place the stainless steel sheet as the cathode, respectively. In the electro-degradation tank and connected to a DC power supply; the temperature is raised to 80°C, the power is turned on, the constant voltage at both ends of the electro-degradation tank is 36V, and the temperature of the electro-degradation is a constant temperature of 80°C, so that the resin base in the carbon fiber reinforced composite material used as the anode electrochemically occurs oxidation. After 36 ho...

Embodiment 3

[0040] The resin raw material in carbon fiber reinforced composite materials is glycidyl amine epoxy resin.

[0041] In this embodiment, acids are used as the ionic compound, specifically hydrochloric acid, and formic acid is used as the organic solvent.

[0042]Weigh 10 grams of hydrochloric acid with a concentration of 37%, 50 grams of deionized water, and 200 grams of formic acid and mix them into the electrolysis tank; weigh 2 grams of the complete carbon fiber reinforced composite material as the anode, and place the stainless steel sheet as the cathode in the electrolysis tank respectively. The degradation tank is connected to a DC power supply; the temperature is raised to 80°C, the power is turned on, the constant voltage at both ends of the electro-degradation tank is 23V, and the temperature of the electro-degradation is a constant temperature of 80°C, so that the resin base in the carbon fiber reinforced composite material used as the anode is electrochemically oxidi...

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Abstract

The invention discloses an electrodegradation recovery method of a carbon fiber reinforced composite material. According to the invention, electrocatalytic oxidation is adopted to oxidize thermosetting resin into a low-molecular-weight thermoplastic polymer and quickly dissolve the low-molecular-weight thermoplastic polymer in a mixed solvent, thereby separating and recovering carbon fibers and implementing resource reutilization. The conductivity of the mixed solvent and the solubility of the high-molecular polymer are good, so the catalytic oxidation efficiency of the fiber reinforced material can be obviously improved, a fiber recovery rate can reach 95% or above, and the thermosetting cross-linked epoxy resin is electrocatalytically oxidized and degraded into the low-molecular-weight thermoplastic polymer which is then dissolved in the mixed solvent, so separation and recycling are realized; and after electrocatalytic oxidation, water and the organic solvent can be directly distilled and recovered from electrodegradation liquid, and the electrodegradation liquid recovered through reduced-pressure distillation and washing liquid are mixed to serve as the electrodegradation liquid to be reused. The electrodegradation recovery method has the advantages of mild degradation conditions, simple process operation, no corrosion, a small amount of three wastes, environmental optimization and the like.

Description

technical field [0001] The invention relates to the field of electrolytic recovery of carbon fiber reinforced composite materials, in particular to an electrolytic degradation recovery method of carbon 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 techno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/10C08J11/00C25B3/02C25B15/08C08L63/00C08K7/06
CPCC08J11/10C08J11/00C25B15/08C08J2363/00C08K7/06Y02W30/62
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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