Polyamide acid aqueous sizing agent as well as preparation method and application thereof

Abstract

The invention discloses a polyamide acid aqueous sizing agent as well as a preparation method and application thereof, and provides a polyamide acid aqueous sizing agent prepared from polyamide acid, a cationization reagent and deionized water in a self-emulsifying manner. The sizing agent can be used for obviously improving the interface bonding strength between a reinforced fiber and thermoplastic resin, and has the advantages of good film-forming property, high storage stability and the like. The polyamide acid aqueous sizing agent is simple and reliable in preparation process, high in production efficiency, and convenient to achieve industrial preparation and application.

Description

technical field

[0001] The invention belongs to the technical field of synthetic fiber sizing agents, and relates to a polyamic acid water-based sizing agent for synthetic fiber sizing and a preparation and use method thereof. Background technique

[0002] Carbon fiber has a series of excellent properties such as low density, high strength, high modulus, fatigue resistance and creep resistance, and is currently the most widely used advanced composite material reinforcement in high-tech fields. Since the commercialization of carbon fiber, due to the continuous growth of people's demand for higher performance of composite materials, the research on carbon fiber has been concerned by researchers, and carbon fiber sizing agent is a very important part of it. On the one hand, the purpose of carbon fiber sizing is to protect the fibers from mechanical damage during subsequent processing, significantly reduce the generation of wool and broken filaments, and maintain the origi...

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