Method for reclaiming carbon fiber reinforced epoxy resin composite material

A technology for recycling carbon fiber and epoxy resin, which is applied in plastic recycling, recycling technology, and bulk chemical production. The effect of high degradation efficiency

A technology for recycling carbon fiber and epoxy resin, which is applied in plastic recycling, recycling technology, and bulk chemical production. The effect of high degradation efficiency

CN102181071AActive Publication Date: 2011-09-14NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] will be 1.0×10 -4 L (1.7×10 -3 mol) acetic acid and 0.02 g SO4 2- / ZrO 2 Join 1.95×10 -2 Liter (0.25 moles) of N,N-dimethylformamide, stir evenly to prepare supercritical CO 2 Composite solution; put 0.4 g of the carbon fiber reinforced epoxy resin composite material that needs to be decomposed into the reaction kettle, and then add the prepared supercritical CO 2 Composite solution; after evacuating the reactor, react at 120°C and 12MPa for 15 hours, then cool naturally to room temperature to obtain the primary product; wash and dry the solid product in the primary product to obtain carbon fiber; the liquid in the primary product The product is distilled under reduced pressure to obtain phenol and its derivatives.

Embodiment 2

[0024] will be 6.2×10 -4 L (5.9×10 -3 mol) 30% hydrochloric acid was added to 8.1×10 -3 L (8.9×10 -2 mol) in n-butanol, stir evenly to produce supercritical CO 2 Composite solution; put 0.4 g of the carbon fiber reinforced epoxy resin composite material that needs to be decomposed into the reaction kettle, and then add the prepared supercritical CO 2 Composite solution; after vacuuming the reactor, react at 180°C and 8MPa for 5.5 hours, then naturally cool to room temperature to obtain the primary product; wash and dry the solid product in the primary product to obtain carbon fiber; the liquid in the primary product The product is distilled under reduced pressure to obtain phenol and its derivatives.

Embodiment 3

[0026] will be 2.0×10 -4 L (2.3×10 -3 mol) trifluoromethanesulfonic acid added 5.2×10 -3 L (7.1×10 -2 mol) in acetone, stir evenly to obtain supercritical CO 2 Composite solution; put 0.4 g of the carbon fiber reinforced epoxy resin composite material that needs to be decomposed into the reaction kettle, and then add the prepared supercritical CO 2 Composite liquid; after evacuating the reactor, react at 220°C and 7.5MPa for 7 hours, and then naturally cool to room temperature to obtain the primary product; wash and dry the solid product in the primary product to obtain carbon fiber; The liquid product is distilled under reduced pressure to obtain phenol and its derivatives.

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Abstract

The invention relates to a method for reclaiming a carbon fiber reinforced epoxy resin composite material. The conventional method is high in equipment requirement and high in reclamation cost. The method comprises the following steps of: adding a catalyst into an organic reagent to prepare supercritical CO2 composite solution; putting the carbon fiber reinforced epoxy resin composite material tobe decomposed into a reaction kettle, and adding the supercritical CO2 composite solution; and reacting for 1 to 24 hours at the temperature of between 100 and 250 DEG C under the pressure of 7.5 to 25.0MPa, cooling the product to normal temperature, washing and drying the solid product in the product to obtain carbon fibers, and performing reduced pressure distillation on the liquid product in the product to obtain phenol and derivatives thereof. The catalyst is one or two of liquid super acid, solid super acid, phosphotungstic acid, phosphomolybdic acid, acetic acid, formic acid, hydrochloric acid, sulfuric acid and nitric acid. The method has the advantages of high degradation efficiency, environmental friendliness, low cost and the like, and is a green method for reclaiming the waste and old carbon fiber reinforced epoxy resin composite material.

Description

technical field [0001] The invention belongs to the technical field of polymer recycling, and relates to a method for recycling waste thermosetting composite materials, in particular to a method for recycling carbon fiber-reinforced epoxy resin composite materials by utilizing a supercritical composite liquid. Background technique [0002] Carbon fiber (CF)) / epoxy resin (EP) composite material (referred to as CF / EP composite material) has the characteristics of low density, high specific strength and specific modulus, especially carbon fiber / epoxy resin composite material in the aviation field , automobile industry, sporting goods and other high-tech fields have wide application. With the development of low-carbon economy, the use of carbon fiber / epoxy resin composite materials in various fields has grown rapidly, and has continued to expand to emerging fields such as: new energy, high-speed trains, etc. With the application of carbon fiber / epoxy resin composite materials i...

Claims

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Application Information

Patent Timeline
14 Sep 2011
Publication
CN102181071A
IPC
C08J11/16; C08J11/26; C08J11/28; C08J11/00; C08L63/00; C08K7/06
CPC
Y02P20/54; Y02W30/62
Inventors
徐平来; 李娟