Method for quickly and efficiently recycling high-performance resin-based carbon fiber composite material

A composite material and resin-based technology, which is applied in the field of rapid and efficient recycling of high-performance resin-based carbon fiber composite materials, can solve problems such as poor practicability, and achieve the effect of high recycling efficiency and mild conditions.

Active Publication Date: 2019-08-27
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the shortcomings of poor practicability of existing methods for recycling carbon fiber reinforced resin-based composite materials, the present invention provides a method for quickly and efficiently recycling high-performance resin-based carbon fiber composite materials

Method used

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  • Method for quickly and efficiently recycling high-performance resin-based carbon fiber composite material
  • Method for quickly and efficiently recycling high-performance resin-based carbon fiber composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1. Take a cut piece of amine-cured epoxy resin-based carbon fiber composite material, after cleaning and drying, its mass is 2.070g, and its volume is 35×15×3mm 3 .

[0022] Step 2. Put the composite material in step 1 into a CH3COOH solution, react at a constant temperature of 108°C for 40 minutes, wash it with water several times, and dry it in an oven at 95°C until it reaches a constant weight.

[0023] Step 3. Take the composite material pretreated in step 2 and add it to a mixture of 0.02 g / mL DMSO and KOH, and react at 165° C. for 50 minutes.

[0024] Step 4. Separating the obtained solid product (carbon fiber), washing with water for several times, and drying in an oven at 95° C. until constant weight.

[0025] The mass of recycled carbon fiber was weighed to be 1.207g, and the degradation rate was 98.3%. The mechanical properties of the recycled carbon fiber reach 96% of the original fiber.

[0026] From figure 1 It can be seen that there is still a lar...

Embodiment 2

[0028] Step 1. Take a cut piece of amine-cured epoxy resin-based carbon fiber composite material. After cleaning and drying, its mass is 2.002g and its volume is 40×25×3mm 3 .

[0029] Step 2. Put the composite material in step 1 into a CH3COOH solution, react at a constant temperature at 110°C for 35 minutes, wash it with water several times, and dry it in an oven at 93°C until it reaches a constant weight.

[0030] Step 3. Take the composite material pretreated in step 2 and add it to a mixture of 0.10 g / mL DMSO and KOH, and react at 150° C. for 70 minutes.

[0031] Step 4. The obtained solid product (carbon fiber) is separated, washed with water for several times, and dried in an oven at 93° C. to constant weight.

[0032] The mass of recycled carbon fiber was weighed to be 1.182g, and the degradation rate was 96.6%. The mechanical properties of the recycled carbon fiber reach 98% of the original fiber.

Embodiment 3

[0034] Step 1. Take a cut piece of amine-cured epoxy resin-based carbon fiber composite material, after cleaning and drying, its mass is 2.032g, and its volume is 30×15×3mm 3 .

[0035] Step 2. Put the composite material in step 1 into CH 3 In the solution of COOH, react at a constant temperature at 112°C for 30min, wash with water several times, and dry in an oven at 90°C until constant weight.

[0036] Step 3. Take the composite material pretreated in step 2 and add it to a mixture of 0.06 g / mL DMSO and KOH, and react at 180° C. for 40 minutes.

[0037] Step 4. Separating the obtained solid product (carbon fiber), washing with water for several times, and drying in an oven at 90° C. to constant weight.

[0038] The mass of recycled carbon fiber was weighed to be 1.177g, and the degradation rate was 99.2%. The mechanical properties of the recovered carbon fiber can reach 95%.

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Abstract

The invention discloses a method for quickly and efficiently recycling a high-performance resin-based carbon fiber composite material. The method is used for solving the technical problem of poor practicability of an existing method for recycling the carbon fiber reinforcement resin-based composite material. According to the technical scheme, the method comprises the steps that a waste carbon fiber reinforcement resin-based composite material is put into glacial acetic acid and pretreated for 30-40 minutes at 108-112 DEG C. The pretreated waste carbon fiber reinforcement resin-based compositematerial is put into a drying oven of 90-95 DEG C for being dried, then put into a mixed solution degradation system with dimethyl sulfoxide and potassium hydroxide and degraded for 40-70 minutes at 150-180 DEG C, and the solid product after degradation is separated, cleaned through deionized water and dried. The dried solid product is weighed, and the degradation rate is calculated. According tothe method, the recycle efficiency is high, the conditions are mild, the surface appearance of recycled carbon fibers is good, and the retention rate for the mechanical properties is high.

Description

technical field [0001] The invention relates to a method for recycling carbon fiber-reinforced resin-based composite materials, in particular to a method for quickly and efficiently recycling high-performance resin-based carbon fiber composite materials. Background technique [0002] Resin-based carbon fiber composites are widely used in aerospace, medical equipment, and construction because of their excellent thermal stability, high strength, corrosion resistance, and impact resistance. Sporting goods and many other fields have been extensive that. With the increasing amount of resin-based carbon fiber composite materials, a large amount of leftovers and wastes that have reached the end of their life will be generated during use. Since the resin-based carbon fiber composite material forms a three-dimensional cross-linked network structure during the curing process, it has the characteristics of insolubility and infusibility, making its recycling and reuse a common problem ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/00C08K7/06C08L63/00
CPCC08J11/00C08K7/06C08J2363/00
Inventor 张灵静蒋建军赵琪陈星胡毅李传兵杨国宇陈桦
Owner NORTHWESTERN POLYTECHNICAL UNIV
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