A kind of high temperature resistant carbon fiber sizing agent containing graphene oxide and preparation method thereof

Abstract

The invention relates to a graphene oxide-containing high temperature resisting carbon fiber sizing agent and a preparation method thereof. The method comprises the following steps: 1) introducing a hydrophilic group into a glycidyl amine type epoxy resin through the reaction of the active hydrogen on hydramine and the epoxy group on the high temperature resisting glycidyl amine type epoxy resin and 2) adopting the modified glycidyl amine type epoxy resin, an emulgator, a diluent, deionized water and a graphene oxide aqueous solution for preparing the high temperature resisting carbon fiber sizing agent in the manner of inversed phase emulsification. The graphene oxide-containing high temperature resisting carbon fiber sizing agent and a preparation method thereof disclosed by the invention have the advantages that the preparation process is simple, the operation is easy, the defects of low stability, high cost, environmental pollution, and the like, of the solvent type sizing agent are overcome, the collection property, splitting property and abrasion resistance of the carbon fiber subjected to the sizing treatment with the prepared sizing agent are improved and the heat resistance and the monofilament breaking strength of the carbon fiber and the overall performance of the compound material thereof are all promoted.

Description

technical field [0001] The invention relates to a high-temperature-resistant sizing agent for carbon fibers and a preparation method thereof, in particular to a preparation method of an emulsion-type carbon fiber sizing agent prepared from graphene oxide and high-temperature-resistant glycidylamine epoxy resin. Background technique [0002] Carbon fiber has the advantages of high specific strength, high specific modulus, light weight, high temperature resistance, corrosion resistance, etc., and is widely used in aerospace, transportation, construction, sporting goods and other fields. However, carbon fiber is brittle, and mechanical friction during the manufacturing process will cause carbon fiber monofilaments to break and fluff. Studies have shown that sizing carbon fibers can effectively protect carbon fibers and reduce the incidence of hair and broken filaments. In addition, after sizing treatment, a layer of resin transition layer is formed on the surface of carbon fib...

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Problems solved by technology

Among them, the type and amount of emulsifier are the most important. The hydrophilic-lipophilic balance value of the emulsifier is not suitable, and the emulsification of the resin cannot be realized; if the amount of emulsifier is too large, the thermal stability of the carbon fiber composite material will be insufficient, which cannot meet the requirements of the application. Require

[0004] At present, epoxy emulsion sizing agents mainly use glycidyl ether epoxy resins such as E51 and E44 as the main resin. However, the cured product of this type of glycidyl ether epoxy resin has a low crosslinking density and a low glass transition temperature. , poor heat resistance, which affects the use of composite materials in some special fields, therefore, it is urgent to develop high temperature resistant carbon fiber sizing agent

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