Recovery method of fiber reinforced composite material

A technology for reinforcing composite materials and composite materials, applied in the field of recycling fiber-reinforced composite materials, can solve the problems of harsh reaction conditions, low resin degradation rate, complex process, etc., and achieve the effects of simple operation, low reaction temperature and low energy consumption

Active Publication Date: 2020-06-26
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the recycling of existing fiber composite materials has problems such as high energy consumption, low resin degradation rate, harsh reaction conditions, and complicated processes.

Method used

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  • Recovery method of fiber reinforced composite material

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Experimental program
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Effect test

Embodiment 1

[0045] This embodiment provides a method for recycling fiber-reinforced composite materials, said method comprising the steps of:

[0046] (1) Mix and heat the fiber-reinforced composite material and acid, and then separate solid and liquid to obtain modified fibers and filtrate; wherein, the fiber-reinforced composite material includes carbon fiber-reinforced composite material; the acid is sulfuric acid; the acid The mass concentration is 98wt%; the mass ratio of the fiber reinforced composite material to the acid is 1:27.17; the heating method includes microwave heating; the power of the microwave heating is 20W; the heating time is 20min; The heating temperature is 100°C; the matrix resin of the fiber-reinforced composite material includes a thermosetting resin;

[0047] (2) Carbonize the filtrate obtained in step (1) to obtain a carbon material; wherein, the carbonization is to add biomass (rice husk) to the filtrate, and then perform the first temperature rise and the se...

Embodiment 2

[0050] This embodiment provides a method for recycling fiber-reinforced composite materials, said method comprising the steps of:

[0051] (1) Mix and heat the fiber-reinforced composite material and acid, and then separate solid and liquid to obtain modified fibers and filtrate; wherein, the fiber-reinforced composite material includes glass fiber-reinforced composite material; the acid is alkylated waste sulfuric acid The mass concentration of the acid is 88.2wt%; the mass ratio of the fiber reinforced composite material to the acid is 1:24.27; the heating method includes microwave heating; the power of the microwave heating is 100W; The time is 10 minutes; the heating temperature is 200°C; the matrix resin of the fiber-reinforced composite material includes a thermosetting resin;

[0052] (2) Carbonize the filtrate obtained in step (1) to obtain a carbon material; wherein, the carbonization is to add biomass (rice husk) to the filtrate, and then perform the first temperatur...

Embodiment 3

[0055] This embodiment provides a method for recycling fiber-reinforced composite materials, said method comprising the steps of:

[0056] (1) mixing and heating the fiber-reinforced composite material and acid, followed by solid-liquid separation to obtain modified fibers and filtrate; wherein, the fiber-reinforced composite material is included in the basalt fiber-reinforced composite material; the acid is sulfuric acid; the The mass concentration of the acid is 65wt%; the mass ratio of the fiber reinforced composite material to the acid is 1:14.39; the heating method includes microwave heating; the power of the microwave heating is 800W; the heating time is 300min; The heating temperature is 50°C; the matrix resin of the fiber-reinforced composite material includes a thermoplastic resin;

[0057] (2) Carry out carbonization treatment to the filtrate that step (1) obtains, obtain carbon material; Wherein, described carbonization treatment is to add catalyzer in filtrate, car...

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Abstract

The invention relates to a recovery method of a fiber reinforced composite material. The method comprises: (1), mixing a fiber reinforced composite material and acid, performing heating, and carryingout solid-liquid separation to obtain a modified fiber and a filtrate; and (2), carbonizing the filtrate obtained in the step (1) to obtain a carbon material. Resin of the fiber composite material isdissolved through microwave-enhanced acid and the fiber surface is subjected to chemical oxidation treatment, so that the resin material is dissolved in a sulfuric acid solution, and thus the fiber and the resin material are separated to obtain the fiber material. According to the method, full resource recycling of the fibers and the resin material is achieved through microwaves under the action of biomass or the catalyst, and the recycling energy consumption is greatly reduced through the low reaction temperature; and the method is short in route, easy to operate, low in energy consumption and wide in application range and has great economic benefits and environmental benefits.

Description

technical field [0001] The invention relates to the field of resource utilization of waste, in particular to a method for recycling fiber-reinforced composite materials. Background technique [0002] Fiber Reinforced Polymer (hereinafter referred to as FRP) has the advantages of light weight, high strength, high specific modulus, fatigue resistance, corrosion resistance, designability and good molding processability. Wind power blades, building reinforcement, vehicles and other fields have been widely used. [0003] The recovery methods of waste FRP mainly include physical recovery, energy recovery and chemical recovery. CN106750507A discloses a recycling method of carbon fiber reinforced resin matrix composite material, comprising: cutting the discarded carbon fiber reinforced resin matrix composite material into a plate shape to obtain a carbon fiber reinforced resin matrix composite material plate, and then treating the surfaces of both ends of the obtained composite mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/00C08K9/02C08K7/06C08K7/14C08K7/10C01B32/05C01B17/50C01B17/74
CPCC01B17/50C01B17/74C08J11/00C08K7/06C08K7/10C08K7/14C08K9/02C01B32/05Y02P20/584
Inventor 周志茂李世飞张锁江徐菲
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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