Method for recovering carbon-fiber enhanced epoxy resin composite material

Abstract

The invention relates to a method for recovering a carbon-fiber enhanced epoxy resin composite material. In the existing method, the requirement for equipment is high and the recovery cost is large. The method comprises the following steps of: cutting materials needing to be decomposed into blocks with the volume being 5cm<3>, putting the blocks in a backflow device containing acid liquor, heating for 5-20 minutes at the temperature of boiling point, cleaning and carrying out vacuum drying; then putting the obtained mixture into a reaction kettle, adding an organic solvent and an oxidizing agent, firstly heating, then cooling to normal temperature, and obtaining a primary product; and after cleaning, putting a solid product in the primary product into industrial acetone solution for dipping, obtaining recovered carbon fiber and carrying out pressure-reduced distillation on a liquid product to obtain phenol and derivatives thereof. In the method, reaction under low temperature and low pressure is realized and has the advantages of moderate reaction condition, easy control of reaction, fewer side products, no pollution basically and no corrosion to equipment and the like, so that the method is a green recovering method.

Description

technical field

[0001] The invention belongs to the technical field of polymers, and relates to a method for recycling waste thermosetting resin composite materials, in particular to a method for recycling fiber-reinforced epoxy resin composite materials. technical background

[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 in these high-tech fields, the waste of thermosetting res...