Emulsion type carbon fiber sizing agent and preparation method and application thereof

Abstract

The invention discloses an emulsion type carbon fiber sizing agent and a preparation method and application thereof. The sizing agent comprises main size, an emulsifier, graphene oxide, a diluent and water, wherein the amount of the emulsifier is 0.5-6 weight percent of that of the main size; and the amount of graphene oxide is 0.1-2 weight percent of that of the main size. The preparation method comprises the following steps: mixing the main size, the diluent and the emulsifier, stirring and premixing; and slowly adding an aqueous solution of graphene oxide for performing phase inversion emulsification to form Pickering emulsion in which graphene oxide and the emulsifier are stable, thereby obtaining the sizing agent. The preparation method disclosed by the invention is easy to operate, the stability of the sizing agent is improved by adopting the synergistic effect of graphene oxide and the emulsifier, the amount of the emulsifier is reduced, the environmental pollution is alleviated, the defects that the sizing agent with a single stable emulsifier is low in stability and the amount of the emulsifier is extremely large are overcome, the selection range of the main size is widened, the performances of carbon fibers can be improved after sizing, an interface bonding effect of a carbon fiber composite material is enhanced, and the mechanical strength of the carbon fiber composite material is improved.

Description

technical field

[0001] The invention relates to an emulsion type carbon fiber sizing agent and its preparation method and application, in particular to a Pickering emulsion type carbon fiber sizing agent with graphene oxide as a stabilizer and its preparation method and application. Background technique

[0002] Carbon fiber and its composite materials have many excellent properties and have been widely used in military and civilian fields. However, carbon fiber has a certain degree of brittleness, and during the production process of carbon fiber, there will be phenomena such as monofilament breakage and wool, so it is necessary to sizing the carbon fiber. There are solvent type and emulsion type of carbon fiber sizing agent, and the emulsion type is more commonly used. Emulsion-type sizing agent is a sizing agent made of resin as the main component and by adding a certain amount of emulsifier and auxiliary agent. It uses water as the dispersant, is cheap and pollution-fre...

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