Preparation method and application of carbon fiber bundle suitable for wet papermaking process

The invention discloses a preparation method and application of a carbon fiber bundle suitable for a wet papermaking process, and belongs to the technical field of short carbon fiber wet papermaking, the preparation method comprises the following steps: S1, chemically modifying epoxy resin, introducing a hydrophilic group to obtain modified resin, and neutralizing and salifying to obtain a water-borne epoxy resin sizing agent; s2, mixing the prepared water-based epoxy resin sizing agent with a water-soluble polymer and a surfactant to obtain a water-based sizing agent; s3, carbon fibers are subjected to sizing treatment through the water-based sizing agent in the S2 and then are dried and chopped, and the chopped carbon fibers with different lengths are obtained. The invention relates to a preparation method and application of a carbon fiber bundle suitable for a wet papermaking process, and provides a sizing agent which is used for sizing the carbon fiber bundle, so that the carbon fiber bundle has good proc