Method for enhancing capsule wall toughness of self-repairing microcapsules, and self-repairing microcapsules prepared by the same

Abstract

The present invention provides a method for enhancing mechanical toughness of a capsule wall of a self-repairing microcapsule. The method comprises: 1, adopting a plasma surface modification method to carry out modification on a carbon material to obtain a functional filler; 2, preparing a wall material prepolymer solution for forming the capsule wall of the self-repairing microcapsule, and adding the functional filler obtained from the step 1 to the prepolymer solution; 3, preparing an O / W type emulsion for forming a capsule core material of the self-repairing microcapsule; 4, mixing the prepolymer solution from the step 2 and the O / W type emulsion from the step 3, and carrying out condensation polymerization to obtain a microcapsule suspension; 5, carrying out centrifugating, washing, and vacuum drying to obtain the microcapsule. According to the self-repairing microcapsules prepared by the method of the prevent invention, the mechanical toughness of the capsule wall is improved, such that the problem of microcapsule breaking easily caused by the stirring process during the intelligent anticorrosive coating preparation process can be overcome.

Description

technical field [0001] The invention belongs to the technical field of self-repairing microcapsules, in particular to a method for enhancing the wall toughness of self-repairing microcapsules. Background technique [0002] In recent years, the preparation and application of self-healing microcapsule materials in the field of smart materials has attracted more and more attention from researchers. The preparation and application of intelligent anti-corrosion coatings has become a research hotspot in the field of coatings at home and abroad. With the country's ever-expanding demand for marine development, the application prospects of intelligent anti-corrosion coatings in the field of marine development are broader, especially on marine steel structures such as pipelines, hulls, oil storage tanks and oil and gas platforms in the marine environment. application is more urgent. Professor White and related researchers (S.R.White, N.R.Sottos, P.H.Geubelle, J.S.Moore, M.R.Kessler,...

AI Technical Summary

Problems solved by technology

However, the particle size of these microcapsules is mostly between 1 μm and 120 μm. After washing and drying, the capsule wall of the microcapsules is very brittle and easily damaged by mechanical collisions.

In the process of applying the self-healing microcapsules to the coating at the later stage, some microcapsules are easily broken during the process of adding and stirring, resulting in the rupture and failure of the self-healing microcapsules, which reduces the repair ability of the intelligent anti-corrosion coating.

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