Sizing agent composition, water-soluble sizing agent, preparation method and application of water-soluble sizing agent and fiber surface modification method

The invention relates to the technical field of sizing agents for fibers, in particular to a sizing agent composition, a water-soluble sizing agent, a preparation method and application of the water-soluble sizing agent and a fiber surface modification method. The invention provides a novel water-soluble sizing agent, the sizing agent comprises modified polyphenylene sulfide and water, one or more of hydroxymethyl, aminomethyl, carboxymethyl, chloromethyl, protonated amine ion salt and aldehyde group are introduced into the polyphenylene sulfide, and the water solubility of the polyphenylene sulfide can be improved by introducing the groups; therefore, the thermal stability and the water solubility of the sizing agent are improved. By modifying existing polyphenylene sulfide and flexibly adjusting required functional groups, the prepared sizing agent is wider in application range and can be better applied to carbon fiber surface treatment. 本发明涉及纤维用上浆剂技术领域，具体涉及一种上浆剂组合物、水溶性上浆剂及其制备方法和应用与纤维表面改性的方法。本发明提供一种新的水溶性上浆剂