Patent ID: 11873225
Assignee: INSTITUTE OF ROCK AND SOIL MECHANICS, CHINESE ACADEMY OF SCIENCES
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. A preparation method of a modified montmorillonite self-repairing agent, comprising the following steps:
(1) mixing nano-scale montmorillonite powder with deionized water to obtain a mixture, placing the mixture in a beaker to stand for 12-36 h, and removing supernatant from the mixture to thereby obtain a montmorillonite gel;
(2) enabling the montmorillonite gel obtained in step (1) to react with supercritical CO2to obtain a CO2-modified montmorillonite gel;
(3) enabling the gel obtained in step (2) to go through solid-liquid separation and drying to obtain a CO2-modified montmorillonite self-repairing agent.