Microcapsule for self-repairing of set cement and preparation method thereof

The invention relates to a microcapsule for self-repairing of set cement and a preparation method of the microcapsule. According to the preparation method provided by the invention, acrylamide is used as a raw material to prepare a water-swelling self-repairing core material, and the cement of calcium carbonate and epoxy resin is used as a wall material, so that the raw material is cheap and pollution-free, the production safety is effectively improved, the cost is reduced, the preparation process is simple, and batch production can be carried out. The water-swelling volume and mechanical strength of the polyacrylamide core material can be determined according to the addition amount of the initiator and the cross-linking agent, and the water-swelling self-repairing microcapsule suitable for different working environments can be prepared. The cement wall material of calcium carbonate and epoxy resin has certain mechanical strength, and is not easy to break in the preparation process of the cement paste. The mi