Plugging material, preparation method therefor, and use thereof

A preparing method for a plugging material, wherein the plugging material is prepared from the following raw materials in terms of mass fractions, which comprise:

• 1 to 3.6 parts of pentaerythritol tetraacrylate (PETA)-modified bisphenol A epoxy resin, 1.5 to 2.4 parts of an addition product of m-phenylenediamine and methacrylic acid, 0.12 to 0.17 parts of nanosilica dispersion liquid, with the remainder being water, such that the sum of the mass fractions of the aforementioned raw materials totals 100 parts;
• the preparing method comprises the following steps:
• step S1:
• preparation of oil phase and water phase:
• mixing PETA-modified bisphenol A epoxy resin and the addition product of m-phenylenediamine and methacrylic acid to form an oil phase mixture;
• and mixing nanosilica dispersion liquid with water to obtain a water phase mixture;
• step S2:
• emulsification process:
• pouring the water phase mixture into the continuously stirred oil phase mixture and continue stirring to form a gel-forming liquid;
• step S3:
• curing process:
• transferring the gel-forming liquid and mixing the gel-forming liquid with dibenzoyl peroxide;
• stirring and reacting at a temperature of 50° C. to 120° C. to obtain the plugging material.