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Reinforcement mode based high-performance fiber reinforced resin based composite material recovery method

A high-performance fiber, reinforced resin-based technology, used in the recycling of composite materials, high-performance fiber-reinforced resin-based composite materials recycling, can solve the problems of high energy consumption, high temperature and pressure, reduce recycling costs, reduce temperature and pressure , the effect of large economic benefits

Active Publication Date: 2015-07-01
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The supercritical CO2 epoxy resin recovery method uses high temperature and pressure, and can only be used for carbon fiber reinforced composite materials, etc., because of its high temperature, only high temperature resistant fibers can be recovered, and the energy consumption of the reaction process is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment takes carbon fiber reinforced bismalay resin-based composite material as an example, and introduces its recycling method. The specific steps are as follows:

[0028] Step 1: Pretreat the carbon fiber reinforced bismalay resin-based composite material, that is, cut it into small pieces of 3mm×3mm×3mm. According to its density, each small piece weighs about 0.05g; ten pieces (0.5g) are pretreated. This composite material after the treatment adds reactor, then in reactor, add 2ml ethanol as entrainer and 0.2gNaOH as catalyst, to the carbon fiber reinforced bismaleic resin-based composite material in reactor, ethanol and NaOH catalyst with rotating speed 10r / min to carry out mechanical stirring for 1min to promote the full mixing and contact of ethanol and the surface of the composite material;

[0029] Step 2: Pressurize the CO to 10MPa 2 The gas is passed into the reactor, and the temperature inside the reactor is heated to 250°C, so that the CO 2 The g...

Embodiment 2

[0034] In this embodiment, the carbon fiber reinforced epoxy resin-based composite material is taken as an example, and its recycling method is introduced. The specific steps are as follows:

[0035] Step 1: Add 1g of carbon fiber reinforced epoxy resin-based composite material to the reactor, and then add 3ml of n-propanol as an entrainer in the reactor, and then add 1g of carbon fiber reinforced epoxy resin-based composite material and n-propanol to the reactor. The entrainer uses ultrasonic waves with a frequency of 25kHz and an effective value of the sound pressure amplitude of 20Mpa to carry out intensive treatment for 3 minutes before the reaction, so as to promote the full mixing and contact of n-propanol and the surface of the carbon fiber reinforced epoxy resin-based composite material;

[0036] Step 2: Pressurize the CO to 13MPa 2 The gas is passed into the reactor, and the temperature inside the reactor is heated to 300°C, so that the CO 2 The gas becomes supercrit...

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Abstract

The invention discloses a reinforcement mode based high-performance fiber reinforced resin based composite material recovery method. The method is characterized in that the reinforcement mode comprises reinforcements before and in a supercritical reaction. The method which adopting the reinforcement mode greatly reduces the energy consumption in the reaction process, improves the recovery efficiency, and reduces the recovery treatment cost of a high-performance fiber reinforced resin based composite material; the decomposition rate of a resin matrix is greater than 95%, and the decomposed resin matrix can be reused as chemical engineering raw material; and the loss of the mechanical performances of high-performance fibers recovered in the invention is less than 5%, there is almost no residual on the surface, the recovered high-performance fibers can be reused for producing the composite material, and the resource properties are high.

Description

technical field [0001] The invention relates to a method for recycling composite materials, in particular to a method for recycling high-performance fiber-reinforced resin-based composite materials using a supercritical method, which can be used in the field of recycling of high-performance fiber-reinforced resin-based composite materials. Background technique [0002] High-performance fiber-reinforced resin-based composites have been widely used in aerospace, automobile, wind power and other fields due to their excellent corrosion resistance, thermal stability, high strength and impact resistance. The recovery and recycling of leftovers, defective products, structural parts damaged during use, and scrap products beyond their service life are becoming a key issue. The annual output of composite materials in the world exceeds 5 million tons, the waste is as high as 1 million tons, and the recycling rate is only 10%. The recycling and reuse of high-performance fiber-reinforce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J11/16C08L63/00C08L61/06C08L67/06C08L77/06C08L23/06C08K7/02C08K3/04
CPCY02W30/705Y02P20/54Y02W30/62
Inventor 黄海鸿孙霄成焕波李振文刘志峰
Owner HEFEI UNIV OF TECH
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