High-performance epoxy resin flexibilizer for composite material winding forming and preparation method of high-performance epoxy resin flexibilizer

The invention relates to a high-performance epoxy resin flexibilizer for composite material winding forming and a preparation method thereof.The flexibilizer is composed of hollow or solid polymer nanoparticles and silicon dioxide, the silicon dioxide is deposited on the outer surfaces of the polymer nanoparticles, and the polymer nanoparticles are composed of amphiphilic block polymers. A hydrophilic chain segment of the amphiphilic block polymer faces outwards, and a hydrophobic chain segment of the amphiphilic block polymer faces inwards; the preparation method comprises the following steps: preparing the amphiphilic block polymer into the polymer nanoparticles by using a macromolecular self-assembly technology, depositing a precursor of silicon on the polymer nanoparticles, and carrying out an in-situ reaction to prepare the high-performance epoxy resin toughening agent for winding and forming the composite material. The method disclosed by the invention is simple in preparation, and the obtained hybrid n