The invention provides a method for recycling a carbon
fiber material from a waste
wind power blade main beam carbon plate, hydrophilic
carbon fibers and a wave-absorbing material, and belongs to the technical field of
waste recycling and reusing and electromagnetic wave absorbing materials. The wave-absorbing material is prepared by the following steps: recycling a carbon
fiber material in a waste
wind power blade main beam carbon plate by pyrolyzing the waste
wind power blade main beam carbon plate, crushing the carbon
fiber material into
powder by a
ball mill,
doping recycled
carbon fibers and recycled carbon fiber
powder according to a certain proportion, preparing the recycled
carbon fibers and the recycled carbon fiber
powder into a composite wave-absorbing material sample by using
epoxy resin as a matrix through a template method, and preparing the composite wave-absorbing material sample into a sample. Finally, a composite wave-absorbing material product with excellent wave-absorbing performance is obtained. The recycled carbon fiber material can be subjected to
surface modification in a
pyrolysis oxidation mode, clean hydrophilic carbon fibers are obtained, the treated carbon fiber surface has more
oxygen-containing groups, the interfacial compatibility and
bonding strength of the carbon fiber and a matrix can be improved, and the carbon fiber material can be suitable for compounding of other various materials.