Method for preparing highly stable superhydrophobic composite material with flexible armor structure for metal corrosion prevention

A method for preparing a highly stable superhydrophobic composite material with flexible armor structure for metal corrosion prevention, comprising the following steps:

• S1:
• preparation of superhydrophobic modified nanoparticles:
• ultrasonically dispersing hydrophilic nanoparticles in an organic solvent, and then, adding a low-surface-energy organosilane coupling agent under a stirring condition for superhydrophobic modification to obtain superhydrophobic modified nanoparticles, wherein the volume ratio of the low-surface-energy organosilane coupling agent to the organic solvent is 0.05:3-0.15:3, and the mass concentration of the nanoparticles is 0.10-0.30 g/mL;
• and in S1, the reaction condition for modification is a room temperature, and the reaction time is 6-24 h;
• S2:
• preparation of superhydrophobic suspension by phase separation method:
• completely dissolving polyester in the organic solvent, then adding the superhydrophobic modified nanoparticles under a stirring condition until the superhydrophobic modified nanoparticles are completely dispersed by stirring, adding a non-solvent to induce phase separation after the superhydrophobic nanoparticles are completely dispersed, and preparing a superhydrophobic suspension after the completion of phase separation, wherein the polyester is one or more of polyurethane, thermoplastic polyurethane, and Si-modified polyester;
• the organic solvent is one or more of ethyl acetate, butyl acetate, and acetone;
• the mass concentration of the polyester is 0.01-0.10 g/mL;
• and the non-solvent for inducing phase separation is anhydrous ethanol, and the volume ratio of the non-solvent to the organic solvent is 0.10-0.20 mL/mL;
• S3:
• preparation of flexible armor structure:
• diluting an epoxy resin adhesive in the organic solvent to prepare an epoxy diluent, then spraying the epoxy diluent onto the surface of a pre-treated metal substrate by a spray method to prepare an epoxy adhesive layer, subsequently uniformly bonding flexible armor particles onto the surface of the epoxy adhesive layer, and performing curing to prepare a flexible armor structure, wherein the flexible armor particles are regenerated rubber particles from waste tires, the particle size is 60-65 meshes, and the dosage of the flexible armor particles is 100-300 g/m2;
• and
• S4:
• preparation of highly stable superhydrophobic composite material with flexible armor structure for metal corrosion prevention:
• spraying the superhydrophobic suspension prepared in S2 onto the surface of the flexible armor structure prepared in S3 by a spray gun, and preparing a highly stable superhydrophobic composite material with flexible armor structure for metal corrosion prevention after complete curing.