Recyclable carbon fiber reinforced epoxy resin composite material, preparation method thereof and application

Abstract

The invention discloses a recyclable carbon fiber reinforced epoxy resin composite material, a preparation method thereof, and an application. The composite material is prepared from the following components in parts by mass: 100 parts of aldehyde-based monofunctional epoxy resin, 5 to 120 parts of curing agent, 0 to 8 parts of curing accelerator, 0 to 40 parts of epoxy reactive diluent, 5 to 300parts of carbon fiber, and 0 to 400 parts of solvent. The carbon fiber is recycled by subjecting the recyclable carbon fiber reinforced epoxy resin composite material to a hydrolysis reaction under acidic conditions. The composite material obtained by the invention has excellent mechanical properties and higher glass transition temperature, and can be degraded under mild conditions to realize carbon fiber recycling.

Description

technical field

[0001] The invention relates to a method for preparing a carbon fiber-reinforced composite material, in particular to a simple method for preparing a recyclable carbon fiber-reinforced epoxy resin composite material and its application, and belongs to the technical field of polymer materials. Background technique

[0002] Carbon fiber reinforced composite materials have the characteristics of light weight, high strength and high heat resistance, and are widely used in aerospace, wind power generation, automobiles, civil engineering, sporting goods and other fields. Despite the many advantages of carbon fiber-reinforced composites, their widespread use creates significant economic and environmental challenges due to large amounts of waste, including unused prepreg, incisions from the manufacturing process, and end-of-life components. Therefore, the recycling of carbon fiber composite materials is very necessary.

[0003] The difficulty in recycling carbon fib...

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